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NEET UG BIOLOGY MCQ: CELL-CYCLE & CELL DIVISION

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Analyzing +4 | -1

Assertion (A): If the chromosome number is

2n

during

G_1,

after

S

phase the chromosome number is the same
Reason (R): After

S

phase there is no increase in DNA per cell
The correct option among the following is

View answer and explanation

Correct option: C

A is true, but R is false

Option C (A is true, but R is false) is correct because the chromosome number remains the same after S phase, but the DNA content doubles.

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At metaphase of mitosis, each chromosome consists of ________ chromatid(s) _________ centromere(s) _________ kinetochore(s) and _________ molecule(s) of DNA. Mitosis occurs in: In which phase, DNA content will be doubled? Assertion : Cell growth is a continuous process
in terms of cytoplasmic increase.

Reason : DNA synthesis occurs only during
two specific stages in the cell cycle. Interkinesis means What is the approximate duration of cell cycle for a mammalian cell?