Cell Cycle and Cell Division Test

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Cell Cycle and Cell Division Test - 13

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Question 1
1 / -0

The synthesis of RNA and protein takes place in which phase of the cell cycle?

A
S phase

B
M phase

C
G$$_1$$ and G$$_2$$ phase

D
None of the above

Solution

1st gap phase, as no DNA synthesis. 1st growth phase as of RNA, proteins, membranes in this phase. This phase generally takes about 30 to 50% part of entire cell division. Chromatin is fully extended, no more distinguishable chromosomes. Transcription of rRNA, tRNA, mRNA and protein synthesis (enzymes, regulatory proteins, tubulin and other mitotic apparatus proteins) occur in this phase. Synthesis of RNA and proteins continues in the second growth phase. This phase can be absent in division giving rise to pollen grains in higher plants. Nuclear envelope remains intact during interphase. Nucleolus greatly increased in size due to of rRNA and ribosomal proteins. So, the correct answer is option C.
Question 2
1 / -0

Meiosis occurs in which of the following?

A
Diploid cells

B
Haploid cells

C
Mostly haploid cells but occasionally diploid cells

D
Mostly diploid cells but occasionally haploid cells

Solution

Meiosis is a type of cell division in which chromosome number is reduced by half to produces gamete cells. It is required to produce egg and sperm cells necessary for sexual reproduction. Thus the correct answer is option A.
Question 3
1 / -0

Interphase is the phase of the cell in which the cell ___________________.

A
Reads DNA

B
Obtains nutrients

C
Grows

D
All of the above

Solution

Interphase is the phase of the cell cycle in which a cell spends most of its life. During this phase, the cell copies its DNA in preparation for mitosis in the S phase of interphase. Interphase is the metabolic phase of the cell where the cell obtains nutrients and metabolizes them, grows, and conducts other "normal" cell functions. Therefore, the correct answer is option D.
Question 4
1 / -0

Which one ensures maintainance of chromosome number from generation to generation?

A
Mitosis

B
Meiosis

C
Splicing

D
Metamorphosis

Solution

Meiosis occurs in the life cycle of all organisms that reproduce sexually. In meiosis, four daughter cells are produced, each with one member of each homologous pair of the chromosomes of the parent cell, known as the haploid (n) state. Meiosis ensures the maintenance of the chromosome number in body cells from generation to generation. It is a source of variation.
So, the correct answer is option B.
Question 5
1 / -0

The stage at which cytokinesis begins in plant cells is

A
G$$_0$$ phase

B
Interphase

C
Anaphase

D
Telophase

Solution

During cell division after karyokinesis, the cytoplasm of the parent cell divides equally into daughter cell by the process of cytokinesis. This occurs in telophase. The process of cytokinesis takes place by formation of a furrow in an animal cell while in plant cell it takes by phragmoplast which further develops into the cell wall.
So, the correct answer is option D
Question 6
1 / -0

During which of the following phases does cytokinesis take place?

A
Interphase

B
Prophase

C
Metaphase

D
Anaphase

E
Telophase
Question 7
1 / -0

The cell gets ready for mitosis in the

A
G$$_1$$ phase

B
G$$_2$$ phase

C
G$$_0$$ phase

D
M phase

Solution

G$$_2$$ phase is the phase of rapid cell growth and protein synthesis for mitosis. Curiously, G$$_2$$ phase is not a necessary part of the cell cycle, as some cell types proceed directly from DNA replication to mitosis.
So, the correct answer is option B.
Question 8
1 / -0

The process by which the cytoplasm of a cell divides to form two daughter cells.

A
Cytokinesis

B
Prophase

C
Metaphase

D
Anaphase

E
Telophase

Solution

The process by which the cytoplasm of a cell divides to form two two daughter cells is known as cytokinesis. Thus option A is the correct answer.
Question 9
1 / -0

The difference between mitosis and meiosis is that in meiosis
I. Two cell divisions take place.
II. DNA replicates during interphase.
III. Haploid cells are produced from diploid cells.

A
I only

B
II only

C
III only

D
I and III only

E
I, II, and III

Solution

Mitosis is an equational type of cell division where only one cell division occurs. Two diploid cells are formed from parent diploid cell. Meiosis is divided into meiosis I and meiosis II. It involves the reductional division in which four haploid cells formed from the diploid parent cell. DNA replication takes place in the interphase in meiosis as well as in mitosis.
Thus, the correct answer is option 'I and III only'.
Question 10
1 / -0

DNA replication takes place in
I. Mitosis
II. G$${_1}$$ phase
III. S phase

A
I only

B
II only

C
III only

D
I and III only

E
I, II and III

Solution

The diagram represents the various stages of cell division. However, during the meiotic division, when the cells pass from the G$$_1$$ phase to the G$$_2$$ phase, it goes through an intermediary phase the S phase or the Synthesis phase. During this phase of the cell cycle, DNA replication takes place so that genetic abnormalities leading to cell death or diseases are prevented.
So, the correct answer is option C.

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Cell Cycle and Cell Division Test - 13

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Cell Cycle and Cell Division Test - 13

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Question 1

S phase

M phase

G$$_1$$ and G$$_2$$ phase

None of the above

Solution

Question 2

Diploid cells

Haploid cells

Mostly haploid cells but occasionally diploid cells

Mostly diploid cells but occasionally haploid cells

Solution

Question 3

Reads DNA

Obtains nutrients

Grows

All of the above

Solution

Question 4

Mitosis

Meiosis

Splicing

Metamorphosis

Solution

Question 5

G$$_0$$ phase

Interphase

Anaphase

Telophase

Solution

Question 6

Interphase

Prophase

Metaphase

Anaphase

Telophase

Question 7

G$$_1$$ phase

G$$_2$$ phase

G$$_0$$ phase

M phase

Solution

Question 8

Cytokinesis

Prophase

Metaphase

Anaphase

Telophase

Solution

Question 9

I only

II only

III only

I and III only

I, II, and III

Solution

Question 10

I only

II only

III only

I and III only

I, II and III

Solution

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