NEET TEST SERIES 160 BIOLOGY

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1. Select the incorrect statement regarding DNA replication

(a) Leading strand is formed 5’⟶ 3’ direction
(b) Okazaki fragments are formed in 5’⟶ 3’ direction
(c) DNA polymerase catalyses polymerisation in 5’⟶ 3’ direction
(d) DNA polymerase catalyses polymerisation in 3’⟶ 5’ direction

Deselect Answer

a)

b)

c)

d)

None

2. The C₄ plants arc photosynthetically more efficient than C₃ plants because:

(a) the CO₂ compensation point is more
(b) CO₂ generated during photorespiration is trapped and recycled through PEP carboxylase
(c) the CO₂ efflux is not prevented
(d) they have more chloroplasts

Deselect Answer

a)

b)

c)

d)

None

3. Food chain in which micro-organisms breakdown the food formed by primary producers is

(a) parasitic food chain
(b) detritus food chain
(c) consumer food chain
(d) predator food chain

Deselect Answer

a)

b)

c)

d)

None

4. Independent assortment of genes does not lake place when

(a) genes are located on homologous chromosomes
(b) genes are linked and located on same chromosomes
(c) genes are located on non-homologous chromosomes
(d) All the above

Deselect Answer

a)

b)

c)

d)

None

5. If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected, because

(a) energy flow will be blocked
(b) herbivores will not receive solar energy
(c) mineral movement will be blocked
(d) rate of decomposition will be very high

Deselect Answer

a)

b)

c)

d)

None

Deselect Answer

a)

b)

c)

d)

None

7. A small segment of DNA contains the base sequence CGT. If an mRNA transcript is made that includes this DNA sequence, what will be the anticodon on the tRNA that will bind to the corresponding mRNA codon for this DNA triplet?

(a) CGT
(b) GCA
(c) CGU
(d) GCT

Deselect Answer

a)

b)

c)

d)

None

8. Phosphofructokinase is inhibited by H⁺ ions and hence the rate of glycolysis:

(a) increases when pH falls
(b) decreases when pH falls significantly
(c) neither increase or decrease
(d) either increase or decrease

Deselect Answer

a)

b)

c)

d)

None

9. Which one of the following is incorrect about the activities associated with PS-I and PS-II in non-cyclic photophosphorylation?

a) Water is oxidised in PS -II, but not in PS -I.
b) Photons (light) are needed to activate both PS -I and PS-II
c) Photolysis of water, formation of ATP + NADPH + H occur.
d) Production of NADPH + H⁺is associated with PS – II, but not with PS -I. 5’⟶ 3’

Deselect Answer

a)

b)

c)

d)

None

10. The C₄ plants arc photosynthetically more efficient than C₃ plants because:

(a) the CO₂ compensation point is more
(b) CO₂ generated during photorespiration is trapped and recycled through PEP carboxylase
(c) the CO₂ efflux is not prevented
(d) they have more chloroplasts

Deselect Answer

a)

b)

c)

d)

None

11. Which is the correct combination?

Deselect Answer

a)

b)

c)

d)

None

12. Match the following and choose the correct combination from the options given below.

Deselect Answer

a)

b)

c)

d)

None

13. Which of the following is not currently a major cause of the global reduction in biodiversity?

(a) Overexploitation
(b) Global warming
(c) Habitat destruction
(d) Introduction of foreign predators and disease

Deselect Answer

a)

b)

c)

d)

None

14. ABO blood group system is due to

(a) multifactor inheritance
(b) incomplete dominance
(c) multiple allelism
(d) epistasis

Deselect Answer

a)

b)

c)

d)

None

15. Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

(a) Yeast – statins
(b) Acetobacter aceti – acetic acid
(c) Clostridium butylicum – lactic acid
(d) Aspergillus niger – citric acid

Deselect Answer

a)

b)

c)

d)

None

Deselect Answer

a)

b)

c)

d)

None

17. Assertion: In a food chain, members of successive higher levels are fewer in number.

Reason: Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the higher level.

(a) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(b) (A) is correct but (R) is not correct
(c) (A) is not correct but (R) is correct
(d) Both (A) and (R) are correct and (R) is the correct explanation of (A)

Deselect Answer

a)

b)

c)

d)

None

Deselect Answer

a)

b)

c)

d)

None

Deselect Answer

a)

b)

c)

d)

None

20. Which of the following statement(s) is/are incorrect?

(i) Endosperm formation starts prior to first division of zygote.
(ii) Angiospermic endosperm is mostly 3N while gymnospermic one is N.
(iii) Coconut has both liquid nuclear (multinucleate) and cellular endosperm.
(iv) Milky water of green tender coconut is liquid female gametophyte.
(v) Endosperm develop at the chalazal end.

(a) (i) and (ii)
(b) only(iii)
(c) (iv) and (v)
(d) only (ii)

Deselect Answer

a)

b)

c)

d)

None

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