Chapter 5
Biology
+2 college entrance (after SEE) past exam questions
Past questions and answers
73 questions set from this chapter, 15 of them more than once; 12 are most repeated (set, or a close variant set, in 3 or more exams). Most repeated first.
- Most repeated · 4 of 18 exams
- Asked 4 times
- 2083 · Science Model Set D · 1 mark
- 2083 · Science Model Set E · 1 mark
- 2080 · Science Model · 1 mark
- 2079 · Science Model · 1 mark
Pneumatic bones are found in
(a) reptiles
(b) aves
(c) mammals
(d) insects
Answer
(b) aves
Birds have hollow, air-filled (pneumatic) bones, which reduce body weight and help flight.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- Asked 3 times
- 2083 · Science Model Set D · 1 mark
- 2083 · Science Model Set E · 1 mark
- 2080 · Science Model · 1 mark
Rhizobium, (a bacterium) takes part in
(a) assimilation
(b) nitrification
(c) denitrification
(d) fixation
Answer
(d) fixation
Rhizobium lives in root nodules of leguminous plants and converts atmospheric nitrogen into ammonia, which the plant can use.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- Asked 3 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
- 2079 · Science Model · 1 mark
Ozone layer is present in ……………
(a) troposphere
(b) stratosphere
(c) mesosphere
(d) thermosphere
Answer
(b) stratosphere
The ozone layer lies in the stratosphere (about 15-35 km above the Earth) and absorbs harmful ultraviolet radiation.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- Asked 3 times
- 2083 · Science Model Set D · 1 mark
- 2083 · Science Model Set E · 1 mark
- 2080 · Science Model · 1 mark
Growth movement in plants in response to external stimulus is known as
(a) taxis
(b) tropism
(c) stimulation
(d) reaction
Answer
(b) tropism
Tropism is a directional growth movement of a plant in response to an external stimulus such as light (phototropism) or gravity (geotropism). Taxis is movement of a whole organism.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- Asked 3 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
- 2079 · Science Model · 1 mark
Which gland is heterocrine in nature?
(a) Thyroid
(b) Pancreas
(c) Adrenal
(d) Pituitary
Answer
(b) Pancreas
The pancreas is a mixed (heterocrine) gland: it has an exocrine part secreting digestive enzymes and an endocrine part secreting insulin and glucagon.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- Asked 3 times
- 2083 · Science Model Set D · 1 mark
- 2083 · Science Model Set E · 1 mark
- 2080 · Science Model · 1 mark
Chromosome divides into two daughter chromosomes in ……… of mitosis.
(a) prophase
(b) metaphase
(c) anaphase
(d) telophase
Answer
(c) anaphase
In anaphase the centromeres split and the sister chromatids separate, becoming daughter chromosomes that move to opposite poles.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- Asked 2 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
Phenotypic ratio of Mendel’s monohybrid cross is
(a) 9:3:3:1
(b) 1:2:1
(c) 3:1
(d) 3:2
Similar questions: Phenotypic ratio of Mendel’s monohybrid cross was (2083 · Science Model Set E)
Answer
(c) 3:1
In a monohybrid cross () the F generation shows 3 dominant : 1 recessive phenotypes (the genotypic ratio is 1:2:1).
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- Asked 2 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
Female reproductive part of angiospermic flower is
(a) corolla
(b) androecium
(c) calyx
(d) gynoecium
Similar questions: Male reproductive part of a flower is ___ (2083 · Science Model Set E)
Answer
(d) gynoecium
The gynoecium (pistil), made of stigma, style and ovary, is the female reproductive part of a flower. The androecium is the male part.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- Asked 2 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
Pairing of homologous chromosomes is known as
(a) synapsis
(b) tetrads
(c) dyads
(d) crossing over
Similar questions: Pairing of homologous chromosomes is known as (2083 · Science Model Set E)
Answer
(a) synapsis
Synapsis is the pairing of homologous chromosomes during zygotene of prophase I of meiosis.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- 2083 · Science Model Set E · 1 mark
Phenotypic ratio of Mendel’s monohybrid cross was
(a) 9:3:3:1
(b) 1:2:1
(c) 3:1
(d) 3:2
Similar questions: Phenotypic ratio of Mendel’s monohybrid cross is (2083 · Science Model Set D)
Answer
(c) 3:1
In a monohybrid cross the F2 generation shows 3 dominant : 1 recessive phenotypes (the genotypic ratio is 1:2:1).
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- 2083 · Science Model Set E · 1 mark
Male reproductive part of a flower is ……………
(a) gynoecium
(b) androecium
(c) calyx
(d) corolla
Similar questions: Female reproductive part of angiospermic flower is (2083 · Science Model Set D)
Answer
(b) androecium
The androecium is the whorl of stamens (anther and filament), the male part of a flower. The gynoecium is the female part.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Most repeated · 3 of 18 exams
- 2083 · Science Model Set E · 1 mark
Pairing of homologous chromosomes is known as
(a) crossing over
(b) tetrads
(c) dyads
(d) synapsis
Similar questions: Pairing of homologous chromosomes is known as (2083 · Science Model Set D)
Answer
(d) synapsis
Synapsis is the pairing of homologous chromosomes during zygotene of prophase I of meiosis.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Asked 2 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
Gametophyte of fern is
(a) spore
(b) gamete
(c) plant body
(d) prothallus
Answer
(d) prothallus
In ferns the dominant plant body is the sporophyte, while the gametophyte is the small, free-living, heart-shaped prothallus.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Asked 2 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
Which group of plants have naked seeds?
(a) Bryophytes
(b) Pteridophytes
(c) Gymnosperms
(d) Angiosperms
Answer
(c) Gymnosperms
Gymnosperms (e.g. pine, cycas) bear seeds that are not enclosed in an ovary or fruit, so the seeds are naked.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Asked 2 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
Which doesn't belong to primary consumer of pond ecosystem?
(a) Phytoplanktons
(b) Zooplanktons
(c) Crustaceans
(d) Mosquito
Answer
(a) Phytoplanktons
Phytoplanktons are photosynthetic producers. Zooplanktons, crustaceans and mosquito larvae feed on them, so they are primary consumers.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Asked 2 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
The non-living component of blood is
(a) plasma
(b) corpuscles
(c) stroma
(d) matrix
Answer
(a) plasma
Plasma is the non-living fluid matrix of blood. Corpuscles (red cells, white cells, platelets) are the living cellular components.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Asked 2 times
- 2083 · Science Model Set D · 1 mark
- 2080 · Science Model · 1 mark
transportation from lungs to the body tissues is the function of ………
(a) erythrocytes
(b) leucocytes
(c) thrombocytes
(d) platelets
Answer
(a) erythrocytes
Red blood cells (erythrocytes) contain haemoglobin, which binds oxygen in the lungs and releases it to the tissues.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- Asked 2 times
- 2083 · Science Model Set E · 1 mark
- 2079 · Science Model · 1 mark
Which statement of the following is not true about fern?
(a) Fern belongs to division Tracheophyta
(b) Underground stem of the fern is called rhizoid.
(c) Leaf of fern is feather-shaped and pinnately compound.
(d) Leaves, bearing sori, are called sporophylls.
Answer
(b) Underground stem of the fern is called rhizoid.
The underground stem of a fern is called a rhizome; rhizoids are the root-like hairs of simpler plants such as mosses. The other statements are true.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Which of the following organisms belong to Annelida
(a) Earthworm and flatworm
(b) Leech and Flatworm
(c) Flatworm and Starfish
(d) Earthworm and Leech
Answer
(d) Earthworm and Leech
Both are segmented worms of phylum Annelida. Flatworms belong to Platyhelminthes and starfish to Echinodermata.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Growing foetus derive nutrition from mother's blood through.
(a) Uterus
(b) Fallopian tube
(c) Placenta
(d) Cervix
Answer
(c) Placenta
The placenta connects the foetus to the uterine wall and transfers nutrients and oxygen from the mother's blood.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Which characteristics are not common in insects?
(a) Hard exoskeleton made up of chitin.
(b) Jointed appendages
(c) Mouth parts adapted for different modes of feeding.
(d) Presence of mantle
Answer
(d) Presence of mantle
A mantle is a feature of molluscs. Insects have a chitinous exoskeleton, jointed appendages and mouthparts adapted for different feeding.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Genotype ration in Mendel's monohybrid cross is
(a) 3:1
(b) 9:3:3:1
(c) 1:2:1
(d) 1:2:1:2:4:2:1:2:1
Answer
(c) 1:2:1
In the monohybrid cross Tt × Tt, the F2 genotypes are 1 TT : 2 Tt : 1 tt. (3:1 is the phenotypic ratio.)
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Plants having vascular tissue without seeds are
(a) Angiosperm
(b) Pteridophytes
(c) Bryophytes
(d) Gymnosperms
Answer
(b) Pteridophytes
Pteridophytes (ferns) have xylem and phloem but reproduce by spores, not seeds. Bryophytes lack vascular tissue; gymnosperms and angiosperms bear seeds.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Carbohydrates in the plants are stored in the form of
(a) Glycogen
(b) Starch
(c) Glucose
(d) Maltose
Answer
(b) Starch
Plants store the glucose they make in photosynthesis as starch, while animals store it as glycogen.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
The normal blood pressure of an adult is.
(a) 150/90 mm of Hg
(b) 120/80 mm of Hg
(c) 80/120 mm of Hg
(d) 90/60 mm of Hg
Answer
(b) 120/80 mm of Hg
The normal adult reading is 120 mm Hg systolic (heart contracting) over 80 mm Hg diastolic (heart relaxing).
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Pollination by air is called as
(a) Hydrophily
(b) Anemophily
(c) Ornithophily
(d) Chiropterophily
Answer
(b) Anemophily
Wind pollination is anemophily. Hydrophily is by water, ornithophily by birds and chiropterophily by bats.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
When an organism is cut into pieces and each piece grows into a complex organism. What is the process?
(a) budding
(b) Fragmentation
(c) Spore formation
(d) Regeneration
Answer
(b) Fragmentation
In fragmentation the body breaks or is cut into pieces and each piece grows into a complete new individual, as in Spirogyra and planaria.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Moss belongs to
(a) Algae
(b) Bryophyta
(c) Pteridophytes
(d) Gymnosperm
Answer
(b) Bryophyta
Mosses are small, non-vascular land plants of division Bryophyta, which need moisture for fertilisation.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
A component of prokaryotic cells:
(a) Plasma membrane
(b) DNA
(c) Cytoplasm
(d) All of these
Answer
(d) All of these
A prokaryotic cell has a plasma membrane, cytoplasm and DNA (as a nucleoid). It has no membrane-bound nucleus.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
Mitosis can be observed in ____
(a) Polyploid cell
(b) Diploid cell
(c) Haploid cell
(d) All of these
Answer
(d) All of these
Mitosis divides the nucleus into two identical daughter nuclei, whatever the ploidy. It occurs in haploid, diploid and polyploid cells.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set A · 1 mark
_______ is not a biodegradable pollutant.
(a) Paper
(b) Cotton cloth
(c) Cotton
(d) DDT
Answer
(d) DDT
Paper, cotton cloth and cotton are broken down by microorganisms. DDT is a persistent pesticide that is not easily degraded.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Insects are called arthropods, where arthro refers to.
(a) Jointed
(b) False
(c) Compound
(d) Spiny
Answer
(a) Jointed
The Greek "arthron" means joint and "podos" means foot, so arthropods are animals with jointed legs.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Pisces are generally.
(a) Poikilothermic and oviparous
(b) Poikilithermic and viviparous
(c) Homoiothermic and oviparous
(d) Homoeothermic and viviparous
Answer
(a) Poikilothermic and oviparous
Fishes are cold-blooded (their body temperature varies with the surroundings) and most lay eggs outside the body.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Temporary finger like extensions on amoeba are called.
(a) Cell membrane
(b) Cell wall
(c) Pseudopodia
(d) Cilia
Answer
(c) Pseudopodia
Amoeba moves and captures food using temporary finger-like projections of the cytoplasm called pseudopodia (false feet).
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Starfish belongs to
(a) Annelia
(b) Protista
(c) Echinodermata
(d) Coelenterate
Answer
(c) Echinodermata
Starfish are spiny-skinned marine animals with radial symmetry and a water vascular system, which are characters of phylum Echinodermata.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Plants having vascular tissue and seeds but not fruit.
(a) Angiosperm
(b) Pteridophytes
(c) Bryophytes
(d) Gymnosperms
Answer
(d) Gymnosperms
Gymnosperms have vascular tissue and produce naked seeds that are not enclosed in a fruit. Angiosperms produce fruits, while pteridophytes and bryophytes do not form seeds.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Chlorophyll in photosynthesis is used for.
(a) Absorbing light
(b) Breaking down water molecule
(c) No function
(d) Reduction of
Answer
(a) Absorbing light
Chlorophyll is the pigment that absorbs light energy (mainly red and blue light) and passes it on to drive the light reactions of photosynthesis.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Phenotype ratio in Mendel's dihybrid cross is
(a) 1:2:1
(b) 9:3:3:1
(c) 3:1
(d) 1:2:1:2:4:2:1:2:1
Answer
(b) 9:3:3:1
In Mendel's dihybrid cross, the generation shows four phenotypes in the ratio 9:3:3:1. The ratio 1:2:1:2:4:2:1:2:1 is the genotypic ratio.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
In comparison to red blood cells, white blood cells do not possess.
(a) Nucleus
(b) Protein
(c) Hemoglobin
(d) None of the above
Answer
(c) Hemoglobin
White blood cells have a nucleus and no hemoglobin, since they are colourless. Mature human red blood cells have lost their nucleus but contain hemoglobin, which carries oxygen. WBCs therefore lack hemoglobin, not a nucleus.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
If a number of chromosome in a somatic cell is 24 then the number of chromosome in pollen grain is
(a) 12
(b) 24
(c) 36
(d) 48
Answer
(a) 12
A pollen grain is a haploid () male gametophyte formed by meiosis. With , we get .
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Storage food material found in algae is
(a) Glucose
(b) Sucrose
(c) Cellulose
(d) Starch
Answer
(d) Starch
Algae store food mainly as starch. Green algae store ordinary starch and red algae store floridean starch. Glucose and sucrose are soluble sugars, and cellulose is a structural cell-wall material.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Which of the following fruits is produced by parthenocarpy?
(a) Brinjal
(b) Apple
(c) Banana
(d) Jackfruit
Answer
(c) Banana
Parthenocarpy is the formation of fruit without fertilisation, so the fruit is seedless. Banana is the standard example. Brinjal, apple and jackfruit develop from fertilised flowers.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set B · 1 mark
Pneumatic bones are present in
(a) Fish
(b) Reptile
(c) Bird
(d) Mammal
Answer
(c) Bird
Pneumatic bones are hollow and air-filled and are connected to the air sacs of the lungs. They make the bird light for flight.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Conversion of ammonia to nitrite and then to nitates is called………………….
(a) Ammonification
(b) Dentrification
(c) Assimilation
(d) Nitrification
Answer
(d) Nitrification
Nitrifying bacteria (Nitrosomonas, then Nitrobacter) convert ammonia to nitrite and then to nitrate in the soil.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Humans use hemoglobin to carry oxygen in their blood. Similarly, mollusks and crustaceans use _____________ to carry oxygen in their blood.
(a) Hemovanadin
(b) Hemerythrin
(c) Hemoglobin
(d) Hemocyanin
Answer
(d) Hemocyanin
Hemocyanin is a copper-containing respiratory pigment found in the blood of mollusks and crustaceans, giving it a bluish colour when oxygenated.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Arteries divide to form these blood vessels.
(a) Arterioles
(b) Capillaries
(c) Venules
(d) Veins
Answer
(a) Arterioles
Arteries branch into smaller arterioles, which then divide into capillaries.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Main site of photosynthesis
(a) Leaf
(b) Stem
(c) Chloroplast
(d) Guard cells
Answer
(c) Chloroplast
Photosynthesis takes place in chloroplasts, which contain chlorophyll. The leaf is the main organ, but the cell organelle where it occurs is the chloroplast.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Abnormal and uncontrolled mitosis in an organ will result in:
(a) new organ
(b) Cancer
(c) Zygote
(d) gamete
Answer
(b) Cancer
Mitosis is normally regulated by the cell cycle checkpoints. When control is lost, cells divide endlessly and form a mass of abnormal cells (a tumour), which is cancer.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Transpiration take place through
(a) Ostiole
(b) Stomata
(c) Hydathode
(d) Wound
Answer
(b) Stomata
Most transpiration (about 90 %) occurs through stomata in the leaves. Hydathodes release liquid water (guttation), not water vapour in transpiration.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
In Rhizopus, thread-like structures bearing sporangia at their tips are called.
(a) Filaments
(b) Hyphae
(c) Rhizoids
(d) Roots
Answer
(b) Hyphae
The body of Rhizopus is a mycelium of thread-like hyphae. The erect hyphae bearing sporangia at their tips are the sporangiophores, while rhizoids are the root-like hyphae that anchor it.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
RNA contains repeating units of
(a) deoxyribonucleotides
(b) ribonucleotides
(c) deoxyribonucleosides
(d) ribonucleosides
Answer
(b) ribonucleotides
RNA is a polymer of ribonucleotides, each made of a ribose sugar, a phosphate group and a nitrogenous base (A, U, G or C). DNA is made of deoxyribonucleotides.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
The natural place of an organism or community is known as …………….
(a) Niche
(b) Biome
(c) Habitat
(d) Habit
Answer
(c) Habitat
The habitat is the natural place where an organism or community lives. The niche is its functional role in the ecosystem, and a biome is a large regional ecological community.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
The group of molluscs, which possess eyes like vertebrates.
(a) Bivalvia
(b) Gastropoda
(c) Cephalopoda
(d) pelecypoda
Answer
(c) Cephalopoda
Cephalopods such as octopus and squid have well-developed camera-type eyes similar to those of vertebrates.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Earthworms belongs to
(a) coelenterate
(b) Porifera
(c) Annelida
(d) Platyhelminthes
Answer
(c) Annelida
The earthworm has a body divided into ring-like segments (metameric segmentation), the defining character of phylum Annelida.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Genotype ratio in Mendel's Dihybrid cross is
(a) 1:2:1
(b) 3:1
(c) 9:3:3:1
(d) 1:2:2:1
Answer
(c) 9:3:3:1
This is the option intended for Mendel's dihybrid cross ( of ), where the 9:3:3:1 ratio is the phenotypic ratio (round yellow : round green : wrinkled yellow : wrinkled green). Strictly, the genotypic ratio is , which is not among the options.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Double fertilization is the characteristic of
(a) Algae
(b) Gymnosperms
(c) Bryophyta
(d) Angiosperms
Answer
(d) Angiosperms
Double fertilization is unique to flowering plants: one male gamete fuses with the egg to form the zygote (), and the other fuses with the two polar nuclei to form the primary endosperm nucleus ().
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set C · 1 mark
Which of the following is meristematic tissue
(a) Cambium
(b) Parenchyma
(c) Collenchyma
(d) Angiosperms d) Sclerenchyma
Answer
(a) Cambium
Cambium is a meristematic tissue made of actively dividing cells that cause growth in girth. Parenchyma, collenchyma and sclerenchyma are permanent tissues.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set E · 1 mark
Antibody producing blood cells are
(a) erythrocytes
(b) monocytes
(c) neutrophils
(d) lymphocytes
Answer
(d) lymphocytes
B-lymphocytes differentiate into plasma cells, which secrete antibodies.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set E · 1 mark
A group of individuals with similar morphological and reproductive characters, capable of inbreeding freely and produce fertile off springs refers to …………………….
(a) genus
(b) species
(c) family
(d) class
Answer
(b) species
A species is a group of individuals with similar morphological and reproductive characters that interbreed freely and produce fertile offspring.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set E · 1 mark
Sea-horse belongs to class ………………….
(a) Pisces
(b) Amphibia
(c) Reptilia
(d) Mammalia
Answer
(a) Pisces
The sea-horse is a bony fish, gill-breathing and fin-bearing, so it belongs to class Pisces.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set E · 1 mark
Head of the virus is enclosed by protein coat known as
(a) sheath
(b) viroid
(c) capsid
(d) nucleoid
Answer
(c) capsid
The protein coat enclosing the viral nucleic acid is the capsid, made of subunits called capsomeres.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2083 · Science Model Set E · 1 mark
Where are RBCs destroyed?
(a) bone marrow
(b) liver
(c) heart
(d) kidney
Answer
(b) liver
Worn-out RBCs (lifespan about 120 days) are destroyed mainly in the liver and spleen; among the options, the liver is correct.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
In which of following process, gas is used?
(a) Respiration
(b) metabolism
(c) photosynthesis
(d) nitration
Answer
(c) photosynthesis
Green plants use and water in the presence of sunlight and chlorophyll to make glucose: . Respiration releases rather than using it.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
Which one of the following is not a mammal?
(a) Platypus
(b) Whale
(c) Sea-horse
(d) Dolphin
Answer
(c) Sea-horse
A sea-horse is a bony fish. Platypus, whale and dolphin are mammals (the platypus is an egg-laying mammal).
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
Hyposecretion of pituitary gland causes
(a) dwarfism
(b) gigantism
(c) goiter
(d) cretinism
Answer
(a) dwarfism
Deficiency of growth hormone in childhood causes pituitary dwarfism. Gigantism is due to hypersecretion, while goiter and cretinism are linked to the thyroid gland.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
Zygotene sub stage of prophase-I is characterized by …………………
(a) crossing over
(b) chiasma formation
(c) terminalization of chiasmata
(d) synapsis
Answer
(d) synapsis
In zygotene of prophase-I, homologous chromosomes pair up along their length (synapsis) to form bivalents. Crossing over occurs in pachytene, chiasmata form in diplotene and terminalize in diakinesis.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
If diploid nucleus fuses with a haploid nucleus, the resultant nucleus will be
(a) haploid
(b) diploid
(c) triploid
(d) tetraploid
Answer
(c) triploid
Diploid () + haploid () = , which is triploid. This happens, for example, in the endosperm of flowering plants.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
Which one is complex permanent tissue?
(a) Parenchyma
(b) Collenchyma
(c) Schrenchyma
(d) Xylem
Answer
(d) Xylem
Xylem is made of several cell types (tracheids, vessels, fibres, parenchyma), so it is a complex permanent tissue. Parenchyma, collenchyma and sclerenchyma are simple tissues.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
Venacavae are joined with
(a) Right auricle
(b) Right ventride
(c) Left auricle
(d) Left ventride
Answer
(a) Right auricle
The superior and inferior vena cavae bring deoxygenated blood from the body into the right auricle (atrium).
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
Which part of the heart contains oxygenated blood?
(a) Left part
(b) Right part
(c) Auricles
(d) ventricles
Answer
(a) Left part
The left auricle and left ventricle contain oxygenated blood from the lungs. The right part holds deoxygenated blood.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
Who is known as “Father of Genetics”?
(a) Aristotle
(b) Sir Issac Newton
(c) Gregor John Mendel
(d) Charles Robert Darwin
Answer
(c) Gregor John Mendel
Mendel worked out the laws of inheritance from his pea plant experiments, and is called the Father of Genetics.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
In carbon cycle, carbon enters into the living world through
(a) photosynthesis
(b) respiration
(c) sedimentation
(d) absorption by roots
Answer
(a) photosynthesis
Plants take in atmospheric and fix it into organic compounds by photosynthesis, bringing carbon into the living world.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
- 2079 · Science Model · 1 mark
From living organisms, carbon is released to atmosphere through
(a) photosynthesis
(b) respiration
(c) transpiration
(d) fossilization
Answer
(b) respiration
Living organisms oxidise food in respiration and release to the atmosphere.
Answer checked by Claude Sonnet · Oct 21, 2026
Test yourself · 2 MCQs
Loading…
Questions from Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set A (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set A (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set B (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set B (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set C (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set C (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set D (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set D (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set E (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set E (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Model Question 2080, Science (College model paper (Set B) for the Class 11 Science entrance (100 MCQs: Science 40, English 20, Mathematics 40), 2080 BS; also posted as page images on bishalkafle.com.np (2023)), Kathmandu Model Secondary School (KMC) Model Questions 2022 (2079 BS), Science (College model paper for the Class 11 Science entrance (100 MCQs: English 20, Science 40, Mathematics 40), July 2022), Kathmandu Model Secondary School (KMC) Model Questions 2022 (2079 BS), Management (College model paper for the Class 11 Management entrance (English, Mathematics, GK), July 2022), Kathmandu Model Secondary School (KMC) Model Question 2080 Management and Law, Set I (College model paper for the Class 11 Management and Law entrance (English, Mathematics, GK), 2080 BS; same questions as Set B of the later 2083 release) and KMC Entrance Model Questions, Science (first release, May 2026) (Earlier posting of the 2083 science sets; a few physics questions were later replaced). Answers are written for this site; check them against your class notes.