NEET General 3

Question 1

Which law states that the pressure of a gas is inversely proportional to its volume at constant temperature?

Accepted Answer

Boyle's Law

Answer

Boyle's Law states P₁V₁ = P₂V₂ at constant temperature, showing an inverse relationship between pressure and volume.

Question 2

During which phase of meiosis does crossing over (recombination) typically occur?

Accepted Answer

Prophase I

Answer

Crossing over occurs during Prophase I when homologous chromosomes pair up as bivalents and exchange genetic segments at chiasmata.

Question 3

What is the hybridization of carbon in ethylene (C₂H₄)?

Accepted Answer

sp²

Answer

Each carbon in ethylene forms a double bond using sp² hybrid orbitals, leaving one unhybridized p orbital for the π bond.

Question 4

A car moving at 20 m/s brakes and stops in 4 seconds. What is the magnitude of its deceleration?

Accepted Answer

5 m/s²

Answer

Using a = (v - u)/t = (0 - 20)/4 = -5 m/s², so the magnitude of deceleration is 5 m/s².

Question 5

Which enzyme unwinds the DNA double helix during replication?

Accepted Answer

Helicase

Answer

Helicase breaks hydrogen bonds between base pairs, unwinding and separating the two DNA strands at the replication fork.

NEET - National Eligibility cum Entrance Test Practice Test