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Standard XII

Chemistry

Enzymes

Ribonuclease ...

Question

Ribonuclease a mitotic poison inhibits the cell cycle in

a) Interphase

b) Prophase

c) Metaphase

d) Anaphase

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Solution

Answer is
option (a) interphase

Ribonuclease, a mitotic poison, inhibits cell cycle in interphase. Ribonuclease commonly called RNase is a type of nuclease that catalyzes the degradation of RNA into smaller components. Ribonucleases can be divided into endoribonucleases and exoribonucleases.

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Similar questions

Q. Ribonuclease, a mitotic poison, inhibits cell cycle in which phase?

Q. Which of the following is the shortest of all stages in mitosis?
(a) prophase. (b) metaphase
(c) anaphase. (d) interphase

Q. Select the incorrect match regarding mitotic cell division.
(i) Prophase - Chromosomes to begin to uncoil
(ii) Metaphase - Chromatids move apart
(iii) Telophase - The nuclear membrane reappears
(iv) Late anaphase- Each chromosome consists of two anaphase chromatids
(v) Interphase - Chromosomes are not distinct

Q. A biologist examines a series of cells and counts

160

cells in interphase,

20

cells in prophase,

6

cells in prometaphase,

2

cells in metaphase,

7

cells in anaphase, and

5

cells in telophase. If the complete cell cycle requires

24

hours, what is the average duration of M phase in these cells ?
Stage

160 0.80 9.2

Prophase

20 0.10 2.4

Prometaphase

6 0.03 0.72

Metaphase

2 0.01 0.24

Anaphase

7 0.035 0.84

Telophase

5 0.025 0.6

Totals

200 1.0 24

In which one of the following options the stages of mitosis have been given in correct sequence ?
(a) Prophase, metaphase, telophase, anaphase
(b) Prophase, metaphase, anaphase, telophase
(c) Anaphase, telophase, prophase, metaphase
(d) Telophase, anaphase, prophase, metaphase

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Ribonuclease a mitotic poison inhibits the cell cycle in a) Interphase b) Prophase c) Metaphase d) Anaphase

Answer is option (a) interphase Ribonuclease, a mitotic poison, inhibits cell cycle in interphase. Ribonuclease commonly called RNase is a type of nuclease that catalyzes the degradation of RNA into smaller components. Ribonucleases can be divided into endoribonucleases and exoribonucleases.

Ribonuclease a mitotic poison inhibits the cell cycle in

a) Interphase

b) Prophase

c) Metaphase

d) Anaphase

Answer is
option (a) interphase

Ribonuclease, a mitotic poison, inhibits cell cycle in interphase. Ribonuclease commonly called RNase is a type of nuclease that catalyzes the degradation of RNA into smaller components. Ribonucleases can be divided into endoribonucleases and exoribonucleases.