Class 11 | Biology | chapter 10 | Cell Cycle and Cell Division

During mitosis ER and nucleolus begin to disappear at: (a) late prophase (b) early metaphase (c) late metaphase (d) early prophase

Ruhul Amin Alig

NEET 2021

Which of the following stages of meiosis involves division of centromere ? (1) Metaphase I (2) Metaphase II (3) Anaphase II (4) Telophase II [ NEET 2021 ]

Ruhul Amin Alig

NEET 2021

Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature? (1) Leptotene (2) Zygotene (3) Diakinesis (4) Pachytene [NEET 2021]

Ruhul Amin Alig

NEET 2021

The centriole undergoes duplication during : (1) S-phase (2) Prophase (3) Metaphase (4) G2 phase [NEET 2021 ]

Ruhul Amin Alig

Class 11 | Biology | chapter 10 | Cell Cycle and Cell Division

In meiosis, division is (a) Ist reductional and IInd equational. (b) Ist equational and IInd reductional. (c) both reductional. (d) both equational.

Ruhul Amin Alig

Class 11 | Biology | chapter 10 | Cell Cycle and Cell Division

The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase ? (A) 8 (B) 16 (C) 4 (D) 32 [NEET 2021 ]

Ruhul Amin Alig

NEET 2021

A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is : (1) Degenerate primer sequence (2) Okazaki sequences (3) Palindromic Nucleotide sequences (4) Poly(A) tail sequences [NEET 2021]

Ruhul Amin Alig

Class 11 | Biology | chapter 10 | Cell Cycle and Cell Division

Cell growth , normal metabolism and duplication of organelles occur in which of the following phase 1. S 2. M 3. G1 4. G2

Ruhul Amin Alig

Class 11 | Biology | chapter 10 | Cell Cycle and Cell Division

The given diagram represents which phase of cell-division? 1. Anaphase I 2. Anaphase II 3. Telophase I 4. Telophase II

Ruhul Amin Alig

Meiosis

The following events occur during the process of meiosis. Arrange the following events of meiosis in the correct sequence. I. Terminalization II. Crossing over III. Synapsis IV. Disjunction of genomes (a) I, II, III, IV (b) II, III, IV, I (c) III, II, I, IV (d) IV, I, II, III

Ruhul Amin Alig

Meiosis

Which of the following does not lead to genetic variability? (a) Random fertilization. (b) Crossing over during meiosis. (c) Division of chromosomes during anaphase of mitosis. (d) Orientation of chromosomes during metaphase I of meiosis.

Ruhul Amin Alig

Meiosis

In meiosis, the daughter cells differ from parent cell as well as amongst themselves due to (a) segregation, independent assortment and crossing over. (b) segregation and crossing over. (c) independent assortment and crossing over.

Ruhul Amin Alig

Meiosis

Four daughter cells formed after meiosis are (a) genetically similar (b) genetically different (c) anucleate (d) multinucleate

Ruhul Amin Alig

Meiosis

In Meiosis, (a) division of nucleus twice but DNA replicates only once. (b) division of nucleus twice and DNA replicates twice. (c) division of nucleus once and replication of DNA is also once. (d) division of nucleus once and DNA - replication is twice.

Ruhul Amin Alig

Meiosis

Significance of meiosis lies in (a) reduction of chromosome number to one half. (b) maintaining consistancy of chromosome number during sexual reproduction. (c) production of genetic variability. (d) all of the above.

Ruhul Amin Alig

Meiosis

The diagram shows a cell whose diploid chromosome number is four. Which one of the following option shows correct stage of cell ?

Ruhul Amin Alig

Meiosis

Given below is the representation of a certain event at a particular stage of a type of cell division. Which stage is shown by the given figure?

Ruhul Amin Alig

Meiosis

Mark the incorrect pair. (a) Interphase – S-phase (b) M phase – Metaphase (c) Meiosis I – Diplotene (d) Meiosis II – Diakinesis

Ruhul Amin Alig

Meiosis

A. S phase – DNA replication B. Zygotene – Synapsis C. Diplotene – Crossing over D. Meiosis – Both haploid and diploid cells (a) A and B (b) C and D (c) B and D (d) A and C

Ruhul Amin Alig

Meiosis

Which one is correct about crossing over/genetic recombination? (i) It occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I. (ii) It occurs between non-sister chromatids of homologous chromosomes. (iii) It is recombinase enzyme mediated process. (iv) It is also the reciprocal transfer of genes between the non-homologous chromosomes (a) All of the above (b) All except (iv) (c) (ii), (iii) and (iv) (d) (iii) and (iv)

Ruhul Amin Alig