Free Cell Cycle And Cell Division (Weekly Quiz: 1) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Assertion:
The complex formed by a pair of synapsed homologous chromosome is called as tetrad.
Reason:
Each of the homologous chromosomes in meiotic prophase I consists a two closely apposed sister chromatids

(a) If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

(b) If both the assertion and the reason are true and the reason is a correct explanation of the assertion.

(c) If the assertion is true but the reason is false.

(d) If both the assertion and reason are false.

Question-2

S-phase is not characterized by

(a) No increase in chromosome number

(b) DNA duplication

(c) DNA replication

(d) Duplication of centriole in nucleus of eukaryotic animal cell

Question-3

Synaptonemal complex has a role in

(a) Chromosome movement

(b) Chromosome pairing

(c) Chromosome segregation

(d) Chromosome organization

Question-4

Which of the following statements related to $G_{0}$ stage of the cell cycle are correct?

1. It is a quiescent stage.
2. In this phase, cell cycle is stopped.
3. $G_{0}$ cells do not grow or proliferate but metabolically active.
4. $G_{0}$ cells can divide in response to some stimulus.

(a) (i), (ii) and (iii)

(b) (i), and (ii)

(c) Only (i) and (iv)

(d) All of the above

Question-5

Lampbrush chromosomes occur during

(a) diplotene of meiosis

(b) prophase of mitosis

(c) metaphase of meiosis

(d) interphase

Question-6

Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle?

(a) Transcription from chromosomes and reassembly of the nuclear lamina

(b) Formation of the contractile ring and formation of the phragmoplast

(c) Decondensation from chromosomes and reassembly of the nuclear lamina

(d) Formation of the contractile ring and transcription from chromosomes

Question-7

Which typical stage is known for DNA replication?

(a) $G_2$-phase

(b) metaphase

(c) S-phase

(d) $G_1$-phase

Question-8

In meiosis, division is

(a) Ist equational and IInd reductional.

(b) Ist reductional and IInd equational.

(c) both reductional.

(d) both equational.

Question-9

All cells of a multicellular body have same karyotype because the body has developed from a zygote by –

(a) only mitotic divisions

(b) meiotic and mitotic divisions

(c) only meiotic divisions

(d) mitotic and amitotic divisions

Question-10

During mitosis ER and nucleolus begin to disappear at:

(a) early metaphase

(b) late prophase

(c) late metaphase

(d) early prophase