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NEET Biology RE-NEET 2026 PYQs
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90 questions in RE-NEET 2026
Given below are two statements:Statement I: Chromosomes are fully condensed at the end of prophase I.Statement II: Meiosis I resembles mitosis.
A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is correct, but Statement II is false
D
Statement I is incorrect, but Statement II is true
Show explanation
Chromosomes become fully condensed during diakinesis. Meiosis I is reductional, whereas meiosis II resembles mitosis.
Which of the following is not a characteristic of chordates?
A
Presence of notochord
B
Central nervous system is dorsal
C
Absence of gills
D
Presence of post anal part (tail)
Show explanation
Chordates possess pharyngeal gill slits during some stage of life.
Length of the stem at time 0 is 20 cm. The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the 7th day?
A
50 cm
B
170 cm
C
230 cm
D
460 cm
Show explanation
Length = 20 + (30 × 7) = 230 cm.
Arrange the following elements in descending order of their contribution to percentage weight of the human body.
A
(a), (b), (c), (d)
B
(c), (a), (b), (d)
C
(b), (c), (d), (a)
D
(b), (a), (c), (d)
Show explanation
Oxygen contributes the highest percentage by weight, followed by carbon, hydrogen and nitrogen.
In frogs, the number of pairs of cranial nerves arising from the brain are _______.
A
6
B
9
C
10
D
12
Show explanation
Frogs possess ten pairs of cranial nerves.
Which of the following is used as a clot buster?
A
Streptokinase
B
Penicillin
C
Cyclosporin A
D
Statins
Show explanation
Streptokinase is used as a clot buster to remove blood clots from the blood vessels of patients who have suffered myocardial infarction.
The inactive form of Bt toxin is converted to the active form in the insect gut _______.
A
Due to alkaline pH
B
Due to acidic pH
C
By proteases
D
By nucleases
Show explanation
The Bt toxin exists as an inactive protoxin. The alkaline pH of the insect gut solubilises the crystals and converts the protoxin into its active form.
Given below are two statements:Statement I: Down's syndrome is caused by the absence of one of the X-chromosomes.Statement II: Turner's syndrome is caused by the presence of an additional copy of the chromosomes.
A
Both Statement I and Statement II are correct
B
Both Statement I and Statement II are incorrect
C
Statement I is correct but Statement II is incorrect
D
Statement I is incorrect but Statement II is correct
Show explanation
Down's syndrome is caused by trisomy of chromosome 21. Turner's syndrome is caused by the absence of one X chromosome, resulting in the chromosome complement 45, XO.
Which of the following diseases is not sexually transmitted?
A
Syphilis
B
Tuberculosis
C
Gonorrhoea
D
Genital warts
Show explanation
Tuberculosis is primarily transmitted through airborne droplets. Syphilis, gonorrhoea and genital warts are sexually transmitted infections.
Sperm motility is due to _______.
A
Flagellar movement
B
Ciliary movement
C
Amoeboid movement
D
Muscular movement
Show explanation
The tail of a sperm acts as a flagellum. Its rhythmic movements propel the sperm through the reproductive tract.
