MCQ Test Flashcards

7 cards from real NEET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 MCQ Test flashcards as text

Which enzyme is responsible for unwinding the DNA double helix during replication?
Answer: Helicase
Helicase breaks hydrogen bonds between base pairs to unwind the double helix at the replication fork.
The pH of a neutral solution at 25°C is:
Answer: 7
A neutral solution has equal concentrations of H+ and OH- ions, giving a pH of exactly 7 at 25°C.
Newton's second law of motion states that force equals:
Answer: mass × acceleration
Newton's second law is expressed as F = ma, where force equals mass multiplied by acceleration.
Which part of the human brain controls voluntary muscle movements?
Answer: Cerebrum
The cerebral cortex of the cerebrum controls voluntary muscle movements and higher cognitive functions.
Ozone (O3) is an allotrope of which element?
Answer: Oxygen
Ozone (O3) is an allotropic form of oxygen, differing from the common diatomic O2 molecule.
Which vitamin is synthesized by the human body upon exposure to sunlight?
Answer: Vitamin D
UV-B radiation converts 7-dehydrocholesterol in skin to Vitamin D3 (cholecalciferol) upon sun exposure.
The phenomenon of light bending around obstacles is called:
Answer: Diffraction
Diffraction is the bending of waves, including light, around the edges of obstacles or through slits.

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