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NEET UG BIOLOGY MCQ: CELL-CYCLE & CELL DIVISION
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During which phase(s) of cell cycle, amount of DNA and number of chromosomes respectively in a cell remain at 8C level & 4n if the initial amount of DNA and number of chromosomes are denoted as 4C & 4n, respectively?
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Correct option: D
only
Option D ( only) is correct because after S phase, DNA content doubles (8C) and remains so until mitosis, while chromosome number (4n) remains constant until anaphase.
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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?
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?