Cell Cycle & Interphase — NEET Biology MCQs with Solutions
Free NEET Biology Cell Cycle & Interphase MCQs with step-by-step solutions (6 questions). Part of Cell Cycle and Cell Division. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Cell Cycle & Interphase · easy · theory
DNA replication (synthesis) occurs during which phase of interphase?
A. G2 phase
B. M phase
C. S phase ✓ Correct
D. G1 phase
Solution: In the S (synthesis) phase DNA is replicated, doubling the DNA content (2C → 4C) while chromosome number stays the same.
Q2 — Cell Cycle & Interphase · easy · theory
The longest phase of the cell cycle, during which the cell prepares for division, is:
A. Interphase ✓ Correct
B. Cytokinesis
C. Prophase
D. Metaphase
Solution: Interphase (G1, S, G2) occupies most of the cycle; the actual M phase is comparatively short.
Q3 — Cell Cycle & Interphase · medium · theory
A cell that has exited the cycle and is in a quiescent (non-dividing) state is said to be in:
A. Prophase
B. S phase
C. G0 phase ✓ Correct
D. G2 phase
Solution: G0 (quiescent) cells (e.g. mature neurons) leave the cycle after G1 and may re-enter under signals.
Q4 — Cell Cycle & Interphase · medium · theory
In a human cell, mitosis (M phase) restores the chromosome number to ______ per daughter cell:
A. 23
B. 69
C. 92
D. 46 (diploid, identical to parent) ✓ Correct
Solution: Mitosis is equational: each daughter gets the same 46 chromosomes as the parent.
Q5 — Cell Cycle & Interphase · hard · theory
During G2 phase, the cell:
A. Halves its chromosome number
B. Undergoes cytokinesis
C. Replicates its DNA
D. Synthesises proteins and prepares for mitosis after DNA has replicated ✓ Correct
Solution: In G2 (post-S), the cell grows and makes proteins needed for mitosis; DNA is already doubled.
Q6 — Cell Cycle & Interphase · hard · theory
If a cell has DNA content 2C in G1, its DNA content at the end of S phase and during G2 is:
A. 1C
B. 2C
C. 8C
D. 4C ✓ Correct
Solution: S phase doubles DNA (2C → 4C); it remains 4C through G2 until divided in M phase.