NEET MCQ Test 3

Question 1

Which enzyme is responsible for unwinding the DNA double helix during replication?

Accepted Answer

Helicase

Answer

Helicase breaks hydrogen bonds between base pairs to unwind the double helix at the replication fork.

Question 2

The pH of a neutral solution at 25°C is:

Accepted Answer

7

Answer

A neutral solution has equal concentrations of H+ and OH- ions, giving a pH of exactly 7 at 25°C.

Question 3

Newton's second law of motion states that force equals:

Accepted Answer

mass × acceleration

Answer

Newton's second law is expressed as F = ma, where force equals mass multiplied by acceleration.

Question 4

Which part of the human brain controls voluntary muscle movements?

Accepted Answer

Cerebrum

Answer

The cerebral cortex of the cerebrum controls voluntary muscle movements and higher cognitive functions.

Question 5

Ozone (O3) is an allotrope of which element?

Accepted Answer

Oxygen

Answer

Ozone (O3) is an allotropic form of oxygen, differing from the common diatomic O2 molecule.

NEET - National Eligibility cum Entrance Test Practice Test