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NEET Biology RE-NEET 2026 PYQs
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90 questions in RE-NEET 2026
Mad cow disease is caused by
A
Prions
B
Viroids
C
Aspergillus sp.
D
Mycoplasma sp.
Show explanation
Mad cow disease (Bovine Spongiform Encephalopathy) is caused by infectious protein particles called prions. They do not contain nucleic acids and induce abnormal folding of normal proteins.
Which pigment has absorption peak at 700 nm in the photosynthetic reaction centre PS I (P700)?
A
Chlorophyll b
B
Chlorophyll a
C
Xanthophylls
D
Carotenoids
Show explanation
The reaction centre of Photosystem I is P700, a special form of chlorophyll a that absorbs light maximally at 700 nm.
In water, frogs respire using ________.
A
skin
B
buccal cavity
C
lungs
D
trachea
Show explanation
During aquatic life frogs mainly perform cutaneous respiration through their moist skin.
Which of the following represents the correct sequence of arrangement of bones in the lower limb of humans?
A
Femur-tibia-patella-tarsal
B
Patella-femur-tibia-tarsal
C
Femur-patella-tibia-tarsal
D
Femur-tarsal-patella-tibia
Show explanation
The lower limb consists of femur, patella, tibia-fibula and then the tarsal bones of the foot.
Phyllotaxy is the pattern of arrangement of _________.
A
leaves
B
flowers
C
fruits
D
sepals
Show explanation
Phyllotaxy refers to the arrangement of leaves on the stem or branch of a plant.
Match List-I with List-II.
List-I
List-II
A. Starch
I. Fights infection
B. Antibody
II. Energy storage
C. Concanavalin A
IV. Lectin
D. Glut-4
III. Glucose transport
Choose the correct answer from the options given below:
A
A-I, B-II, C-III, D-IV
B
A-II, B-I, C-IV, D-III
C
A-II, B-I, C-III, D-IV
D
A-I, B-II, C-IV, D-III
Show explanation
Starch is an energy storage polysaccharide, antibodies fight infection, Concanavalin A is a lectin, and GLUT-4 transports glucose.
Given below are two statements:
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
Adult echinoderms are radially symmetrical, whereas larvae are bilaterally symmetrical.
Endomembrane system includes _______.
A
endoplasmic reticulum, Golgi complex, lysosomes and vacuole
B
endoplasmic reticulum, chloroplast, peroxisomes and vacuole
C
mitochondria, chloroplast, peroxisomes and vacuole
D
Golgi complex, chloroplast, peroxisomes and vacuole
Show explanation
The endomembrane system comprises the endoplasmic reticulum, Golgi apparatus, lysosomes and vacuoles.
How many molecules of pyruvic acid are produced at the end of glycolysis from 206 molecules of glucose?
A
206
B
309
C
103
D
412
Show explanation
Each molecule of glucose produces two molecules of pyruvic acid during glycolysis. Therefore, 206 glucose molecules produce 412 pyruvic acid molecules.
Which of the following plant growth regulators is used as herbicide?
A
2,4-D
B
Kinetin
C
Abscisic acid
D
Gibberellin
Show explanation
2,4-D is a synthetic auxin widely used as a selective herbicide for controlling broad-leaved weeds.
