National Testing Agency, NTA will conduct the National Eligibility cum Entrance Test, NEET UG on first Sunday of May

Q1. Which phase of mitosis is characterised by alignment of chromosomes at the equatorial plate?

A. Prophase

B. Metaphase

C. Anaphase

D. Telophase

Q2. Double fertilisation in angiosperms results in the formation of:

A. Zygote and embryo

B. Zygote and endosperm

C. Embryo and seed coat

D. Endosperm and nucellus

Q3. Which enzyme is responsible for carbon fixation in C3 plants?

A. PEP carboxylase

B. RuBisCO

C. Carbonic anhydrase

D. ATP synthase

Q4. Grana are the sites of:

A. Calvin cycle

B. Glycolysis

C. Light reaction of photosynthesis

D. Photorespiration

Q5. Ascent of sap in tall trees is best explained by:

A. Root pressure

B. Diffusion

C. Cohesion–tension theory

D. Active transport

Q6. Interveinal chlorosis in older leaves is mainly due to deficiency of:

A. Nitrogen

B. Iron

C. Magnesium

D. Calcium

Q7. The dominant generation in pteridophytes is:

A. Gametophyte

B. Sporophyte

C. Protonema

D. Embryo

Q8. Marginal placentation is seen in:

A. Tomato

B. Mustard

C. Pea

D. Sunflower

Q9. Microspores in angiosperms develop from:

A. Megaspore mother cell

B. Pollen grain

C. Microspore mother cell

D. Embryo sac

Q10. According to pressure flow hypothesis, translocation of food occurs through:

A. Xylem vessels

B. Tracheids

C. Companion cells

D. Phloem sieve tubes

Q11. The bicuspid valve is present between:

A. Right atrium and right ventricle

B. Left atrium and left ventricle

C. Right ventricle and pulmonary artery

D. Left ventricle and aorta

Q12. Maximum reabsorption of glucose occurs in the:

A. Distal convoluted tubule

B. Loop of Henle

C. Proximal convoluted tubule

D. Collecting duct

Q13. Tidal volume in a normal adult human is approximately:

A. 150 mL

B. 300 mL

C. 500 mL

D. 1000 mL

Q14. Which hormone regulates basal metabolic rate?

A. Insulin

B. Thyroxine

C. Adrenaline

D. Cortisol

Q15. Chemical transmission of nerve impulse occurs at the:

A. Node of Ranvier

B. Axon hillock

C. Synapse

D. Dendrite

Q16. In a dihybrid cross, the phenotypic ratio in F₂generation is:

A. 3:1

B. 1:2:1

C. 9:3:3:1

D. 1:1:1:1

Q17. If allele frequencies remain constant, the population is said to be in:

A. Genetic drift

B. Natural selection

C. Hardy–Weinberg equilibrium

D. Adaptive radiation

Q18. Antibodies are produced by:

A. T-lymphocytes

B. Macrophages

C. Plasma cells

D. NK cells

Q19. Ovulation in the menstrual cycle is triggered by a surge of:

A. FSH

B. Estrogen

C. Progesterone

D. LH

Q20. Wings of birds and wings of insects are examples of:

A. Homologous organs

B. Vestigial organs

C. Analogous organs

D. Atavistic organs

Answer Key

1. B

2. B

3. B

4. C

5. C

6. C

7. B

8. C

9. C

10. D

11. B

12. C

13. C

14. B

15. C

16. C

17. C

18. C

19. D

20. C

Stay tuned for more PYQs.