Cell Cycle and Cell Division Test

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Cell Cycle and Cell Division Test - 3

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Question 1
1 / -0

The resting phase is otherwise called as

A
Interphase

B
Metaphase

C
Prophase

D
Telophase

Solution

The interphase, though called the resting phase, is the time during which the cell is preparing for division by undergoing cell growth in an orderly manner. No divisional activities occur during this phase. Hence the name.
Question 2
1 / -0

Which one proceeds reformation of nuclear envelope during M-phase of cell cycle?

A
Formation of contractile ring and phragmoplast

B
Decondenstion of chromosomes with appearance of nuclear lamina.

C
Transcription from chromosomes and reassemble of nuclear lamina

D
Formation of contractile ring and transcription

Solution

Before the completion of Mitosis reapperance of nuclear membrane takes place along with formation of nucleolus so that the cells bocemo separate enetities after cytokinesis but having same chromosome number as parent cells.
Question 3
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In case of mitosis in 'Gnetum', which of the following is the correct explanation for the term 'karyochoresis'?

A
During cell division, the karyotheca disappears completely.

B
During cell division, the karyotheca and the nucleolus disappear completely.

C
During cell division, the karyotheca does not disappear.

D
During cell division, the mitotic spindle is not formed.
Question 4
1 / -0

In which stage, the cells remain metabolically active but do not proliferate?

A
G1-phase

B
S-phase

C
Go-phase

D
G2-phase

Solution

In Go stage the cells are in a metabolically active state but do not divide unless there are some abnormal genes which reverses the same. This stage is also called quiscent stage. Examples human nerve cells.
Question 5
1 / -0

Which of the following processes takes place during the G₂ phase of cell division?

A
Synthesis of RNA, proteins, nucleotides and amino acids

B
Synthesis of factors required for initiation and completion of mitosis and checks for any abberrations resulting from DNA synthesis

C
Synthesis of RNA and proteins leading to the growth of cell to normal size

D
Synthesis of DNA leading to chromosomal replication
Question 6
1 / -0

DNA molecules of each chromosome become double in

A
G₂phase

B
pachytene

C
S phase

D
G₁phase
Question 7
1 / -0

S phase marks

A
Cytoplasmic growth

B
DNA replication and chromosome duplication.

C
It carries out normal metabolism

D
Chromosome condensation

Solution

S phase marks the phase of DNA replication and chromosome duplication. In this phase increase in the amount of DNA takes place. No synthesis of proteins or RNA takes place.
Question 8
1 / -0

Which statement is not true for karyotype?

A
It provides information about chromosome number, relative size, position of centromere, etc.

B
It is described in the form of idiogram.

C
C-banding brings about AT rich region.

D
Cells are treated with colchicine at metaphase.
Question 9
1 / -0

The number of chromosome and the amount of DNA are changed in

A
Interphase and S phase

B
Anaphase and S phase

C
Metaphase and M phase

D
None of these

Solution

S phase marks the period during which DNA synthesis or replication takes place. During this time the amount of DNA per cell doubles. If the initial amount of DNA is denoted as 2C then it increases to 4C.and even in anaphase the chromosome numbers are changed.
Question 10
1 / -0

Karyokinesis is the

A
Division of cytoplasm

B
Equational division

C
Mitosis division

D
Division of chromosome

Solution

Cell division consists of karyokinesis and cytokinesis. During karyokinesis division of chromosomes takes place and during cytokinesis division of cytoplasm takes place. Ultimately the cell divides into two halves.

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Cell Cycle and Cell Division Test - 3

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Cell Cycle and Cell Division Test - 3

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Question 1

Interphase

Metaphase

Prophase

Telophase

Solution

Question 2

Formation of contractile ring and phragmoplast

Decondenstion of chromosomes with appearance of nuclear lamina.

Transcription from chromosomes and reassemble of nuclear lamina

Formation of contractile ring and transcription

Solution

Question 3

During cell division, the karyotheca disappears completely.

During cell division, the karyotheca and the nucleolus disappear completely.

During cell division, the karyotheca does not disappear.

During cell division, the mitotic spindle is not formed.

Question 4

G1-phase

S-phase

Go-phase

G2-phase

Solution

Question 5

Synthesis of RNA, proteins, nucleotides and amino acids

Synthesis of factors required for initiation and completion of mitosis and checks for any abberrations resulting from DNA synthesis

Synthesis of RNA and proteins leading to the growth of cell to normal size

Synthesis of DNA leading to chromosomal replication

Question 6

G2 phase

pachytene

S phase

G1 phase

Question 7

Cytoplasmic growth

DNA replication and chromosome duplication.

It carries out normal metabolism

Chromosome condensation

Solution

Question 8

It provides information about chromosome number, relative size, position of centromere, etc.

It is described in the form of idiogram.

C-banding brings about AT rich region.

Cells are treated with colchicine at metaphase.

Question 9

Interphase and S phase

Anaphase and S phase

Metaphase and M phase

None of these

Solution

Question 10

Division of cytoplasm

Equational division

Mitosis division

Division of chromosome

Solution

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G₂phase

G₁phase