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NEET Biology RE-NEET 2026 PYQs
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90 questions in RE-NEET 2026
Colostrum, secreted by the mother during the initial days of lactation, is abundant in
A
IgG
B
IgM
C
IgA
D
IgD
Show explanation
Colostrum is rich in IgA antibodies that provide passive immunity to the newborn.
Given below are two statements:Assertion (A): Abingdon tortoise in Galapagos Islands became extinct within a decade after goats were introduced.Reason (R): Goats were more efficient at browsing than Abingdon tortoise.
A
Both A and R are correct and R is the correct explanation of A
B
Both A and R are correct but R is not the correct explanation of A
C
A is correct but R is not correct
D
A is not correct but R is correct
Show explanation
Introduced goats overgrazed vegetation, outcompeting the Abingdon tortoise for food and contributing to its extinction.
The covering of ovum at ovulation is
A
Endometrium
B
Zona radiata
C
Zona pellucida
D
Chorion
Show explanation
At ovulation, the secondary oocyte is surrounded by the zona pellucida and corona radiata. The principal covering is the zona pellucida.
Match List-I with List-II:
List-I List-II A. Both species are harmed I. Predation B. One species is harmed and the other is benefited II. Mutualism C. Both species are benefited III. Competition D. One is benefited while the other has no effect IV. Commensalism
A
A-III, B-IV, C-II, D-I
B
A-I, B-II, C-III, D-IV
C
A-II, B-I, C-IV, D-III
D
A-III, B-I, C-II, D-IV
Show explanation
Competition harms both species. Predation benefits one and harms the other. Mutualism benefits both species. Commensalism benefits one species while the other is unaffected.
Given below are two statements:Assertion (A): In an experiment, Mendel observed that the F1 progeny plants are all tall and none are dwarf.Reason (R): Stem height is a contrasting trait, with tall being dominant and dwarf being recessive.
A
Both A and R are correct and R is the correct explanation of A
B
Both A and R are correct but R is not the correct explanation of A
C
A is correct but R is not correct
D
A is not correct but R is correct
Show explanation
In Mendel's monohybrid cross, the dominant allele for tallness masks the recessive dwarf allele, so all F1 plants are tall.
Which of the following is used as an effective sedative and painkiller for treating post-surgery patients?
A
Interferon
B
Antibiotics
C
Morphine
D
Anti-retroviral drugs
Show explanation
Morphine, obtained from the opium poppy (Papaver somniferum), is an effective analgesic and sedative used for relieving severe pain after surgery.
Which of the following statements are correct?
A
(a), (b) and (c)
B
(a) and (b) only
C
(a) and (c) only
D
(b) and (c) only
Show explanation
Energy flow is unidirectional, the pyramid of energy is always upright, and only about 10% of energy is transferred from one trophic level to the next.
Which of the following statements is correct about Plasmodium?
A
Reproduces sexually in liver cells
B
Reproduces sexually in RBCs
C
Gametocytes develop in mosquito gut
D
Fertilization takes place in mosquito gut
Show explanation
The asexual life cycle occurs in humans, whereas fertilization and sexual reproduction occur inside the gut of the female Anopheles mosquito.
Match List-I with List-II:
List-I List-II A. Transformation I. Restriction enzyme B. Cloning site II. Transfer DNA to host bacteria C. Selection III. Replication D. Ori IV. Antibiotic
A
A-II, B-I, C-IV, D-III
B
A-I, B-II, C-IV, D-III
C
A-III, B-IV, C-II, D-I
D
A-IV, B-I, C-III, D-II
Show explanation
Transformation transfers recombinant DNA into host bacteria. A cloning site contains restriction enzyme recognition sites. Antibiotic resistance genes are selectable markers, and ori is the origin of replication.
The number of vertebrae in a human is _____.
A
7
B
12
C
26
D
206
Show explanation
The adult human vertebral column consists of 26 vertebrae: 7 cervical, 12 thoracic, 5 lumbar, 1 sacrum and 1 coccyx.
