Chapter 4
Study of Selected Animals
MBBS and BDS entrance past exam questions
Past questions and answers
3 questions set from this chapter. Most repeated first.
- 2020 · NEET-UG (India) · 4 marks
The infectious stage of Plasmodium that enters the human body is :
(a) Trophozoites
(b) Sporozoites
(c) Female gametocytes
(d) Male gametocytes
Answer
(b) Sporozoites
The infective stage that the female Anopheles injects into human blood with its saliva is the sporozoite. Trophozoites are feeding stages inside red cells. Gametocytes are the stages that infect the mosquito when it takes a blood meal, so they are not the stage entering humans.
Answer checked by Claude Sonnet · Oct 21, 2026
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- 2025 · NEET-UG (India) · 4 marks
In frog, the Renal portal system is a special venous connection that acts to link :
(a) Liver and intestine
(b) Liver and kidney
(c) Kidney and intestine
(d) Kidney and lower part of body
Answer
(d) Kidney and lower part of body
In frogs, the renal portal system carries blood from the hind limbs and lower body to the kidney via renal portal veins before it reaches the heart. The link between liver and intestine is the hepatic portal system.
Answer checked by Claude Sonnet · Oct 21, 2026
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- 2025 · NEET-UG (India) · 4 marks
Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs.
Choose the correct answer from the following :
(a) The statement is true for water but false for land
(b) The statement is true for both the environment
(c) The statement is false for water but true for land
(d) The statement is false for both the environment
Answer
(b) The statement is true for both the environment
In water, frogs respire through the skin (cutaneous respiration) and the buccal cavity. On land they use the lungs as well as skin and buccal cavity. So the statement holds in both environments.
Answer checked by Claude Sonnet · Oct 21, 2026
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Questions from NEET-UG 2013 (India), question paper (NTA NEET-UG 2013 question paper; only questions on topics in Nepal's MBBS entrance syllabus), AIPMT 2014 (NEET-UG, India), Code R (NTA NEET-UG 2014 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2015 (India), Re-exam Code B (NTA NEET-UG 2015 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2016 (India), Phase 1 Code B (NTA NEET-UG 2016 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2016 (India), Phase 2 Code BB (NTA NEET-UG 2016 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2017 (India), Code A (NTA NEET-UG 2017 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2018 (India), Code AA (NTA NEET-UG 2018 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2019 (India), Code P1 (NTA NEET-UG 2019 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2020 (India), Code E1 (NTA NEET-UG 2020 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2021 (India), Paper code M4 (NTA NEET-UG 2021 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2022 (India), Paper code S3 (NTA NEET-UG 2022 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2023 (India), Paper code E1 (NTA NEET-UG 2023 question paper; only questions on topics in Nepal's MBBS entrance syllabus), NEET-UG 2024 (India), Paper code S3 (NTA NEET-UG 2024 question paper; only questions on topics in Nepal's MBBS entrance syllabus) and NEET-UG 2025 (India), Paper code 45 (NTA NEET-UG 2025 question paper; only questions on topics in Nepal's MBBS entrance syllabus). Answers are written for this site; check them against your class notes.