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NEET UG BIOLOGY MCQ: CELL-CYCLE & CELL DIVISION
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Assertion: Meiosis-I is reductional divison while meiosis-II is equational division.
Reason: In meiosis-I chromosome numbers become half in compare to parental cell while in meiosis-II no change in chromosome number.
Reason: In meiosis-I chromosome numbers become half in compare to parental cell while in meiosis-II no change in chromosome number.
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Correct option: A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Option A (Both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because Meiosis I is a reductional division where the chromosome number is halved, and Meiosis II is equational, maintaining the chromosome number.
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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?