Cell Cycle and Cell Division Test

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Cell Cycle and Cell Division Test - 27

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Question 1
1 / -0

Most inactive stage of cell cycle also referred as resting phase of cell division is:

A
Prophase

B
Metaphase

C
Telophase

D
Interphase

Solution

Interphase is the phase of the cell cycle in which the cell spends and performs the majority of its time. Then, in preparation for cellular division, it increases in size. Interphase is also considered to be the living phase of the cell, in which the cell obtains nutrients, grows, reads its DNA, and conducts other "normal" cell functions. The majority of eukaryotic cells spend most of their time in interphase. This phase was formerly called as the resting phase. However, interphase does not describe a cell that is merely resting but is rather an active preparation for cell division.
Question 2
1 / -0

How many chromosomes will be in cells of human, produced by meiosis?

A
46

B
69

C
23

D
100

Solution

23 chromosomes are present in the human cell during meiosis. A typical diploid human cell contains 23 pairs of chromosomes; 46 total, half of maternal origin and half of paternal origin. Meiosis produces haploid gametes with one set of 23 chromosomes. When two gametes fuse, the resulting zygote is once again diploid, with the mother and father each contributing 23 chromosomes.
Question 3
1 / -0

During G$$_1$$ phase, a diploid cell contains the amount of DNA equal to a

A
Diploid cell

B
Tetraploid cell

C
Haploid cell

D
None of the above

Solution

During G$$_1$$ phase, a diploid cell contains the amount of DNA equal to a diploid cell. During G$$_1$$ phase, the cell grows in size and synthesizes mRNA and proteins that are required for DNA synthesis. Once the required proteins and growth are complete, the cell enters the next phase of the cell cycle, S phase. G$$_1$$ phase is particularly important in the cell cycle because it determines whether a cell commits to the division or to leaving the cell cycle. If a cell is signaled to remain undivided, instead of moving onto the S phase, it will leave the G$$_1$$ phase and move into a state of dormancy called the G$$_0$$ phase.
So, the correct answer is option B.
Question 4
1 / -0

DNA synthesis takes place in which of the following phase?

A
S phase

B
G$$_1$$ phase

C
G$$_2$$ phase

D
None of the above

Solution

DNA synthesis takes place in S phase. S phase or the synthesis phase is the part of the cell cycle in which DNA is replicated. It occurs between G$$_{1}$$ phase and G$$_{2}$$ phase of the cell cycle.
So, the correct answer is option A.
Question 5
1 / -0

Amitosis was coined by

A
Farmer

B
Remac

C
Strassburger

D
A. Flemming

Solution

Amitosis is a term describing cell division without nuclear envelope breakdown and formation of the well-visible mitotic spindle and condensed chromosomes. It is the direct cell division. It is also called as closed mitosis. The term amitosis was coined by Remac.
So, the correct answer is option B.
Question 6
1 / -0

Nucleus becomes bigger in ............ phase.

A
G$$_1$$

B
G$$_2$$

C
S

D
M

Solution

DNA synthesis takes place in S phase. S phase or the synthesis phase is the part of the cell cycle in which DNA is replicated and thus the nucleus grows in size due to the content being doubled. It occurs between G$$_1$$ phase and G$$_2$$ phase of the cell cycle.
Thus, the correct answer is option A.
Question 7
1 / -0

A contractile mid-body forms during cytokinesis in

A
Animal

B
Higher plants

C
Fungi

D
Algae

Solution

A contractile midbody forms during cytokinesis in animals. A contractile ring, made of non-muscle myosin II and actin filaments, assembles equatorially at the cell cortex. Myosin II uses the free energy released when ATP is hydrolyzed to move along these actin filaments, constricting the cell membrane to form a cleavage furrow. Continued hydrolysis causes this cleavage furrow to ingress.
So, the correct answer is option A.
Question 8
1 / -0

Division of nucleus is indirect in

A
Mitosis

B
Binary fission

C
Budding

D
Fragmentation

Solution

Mitosis is known as equational division. it mainly occurs in somatic cells. The stages of mitosis are prophase, metaphase, anaphase, and telophase. During mitosis, the chromosomes, which have already duplicated, condense and attach to fibers that pull one copy of each chromosome to opposite sides of the cell. The cell, then, divides by cytokinesis to produce two genetically identical daughter cells.
So, the correct answer is option A.
Question 9
1 / -0

Cell cycle was divided into four stages i.e. G$$_1$$, S, G$$_2$$, M by

A
W. Flemming

B
Strass burger

C
Howard and Pelc

D
Farmer

Solution

Howard and Pelc divided cell cycle in four stage. The cell cycle is an ordered set of events, culminating in cell growth and division into two daughter cells. Non-dividing cells not considered to be in the cell cycle. The stages are G$$_1$$-S-G$$_2$$-M. The G$$_1$$ stage stands for "GAP 1". The S stage stands for "Synthesis". This is the stage when DNA replication occurs. The G$$_2$$ stage stands for "GAP 2". The M stage stands for "mitosis", and is when and cytoplasmic division occur.
Question 10
1 / -0

In which stage of cell division, division of matrix of chromosome occurs?

A
Late prophase

B
Early metaphase

C
Late metaphase

D
Anaphase

Solution

During late metaphase, a chromosome consists of two chromatids joined together by the centromere, and get arranged at the equatorial plate. The spindle fibres contract, separating each chromosome into its two chromatids, or "single" chromosomes. One of each pair of chromatids goes to each of the two new cells that form. So, if the cell had four double chromosomes before metaphase, the new cells will each have four single chromosomes. The number of chromosomes remains unchanged, the double chromosomes have simply become single chromosomes.
So, the correct answer is option C.

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Cell Cycle and Cell Division Test - 27

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Cell Cycle and Cell Division Test - 27

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Question 1

Prophase

Metaphase

Telophase

Interphase

Solution

Question 2

46

69

23

100

Solution

Question 3

Diploid cell

Tetraploid cell

Haploid cell

None of the above

Solution

Question 4

S phase

G$$_1$$ phase

G$$_2$$ phase

None of the above

Solution

Question 5

Farmer

Remac

Strassburger

A. Flemming

Solution

Question 6

G$$_1$$

G$$_2$$

S

M

Solution

Question 7

Animal

Higher plants

Fungi

Algae

Solution

Question 8

Mitosis

Binary fission

Budding

Fragmentation

Solution

Question 9

W. Flemming

Strass burger

Howard and Pelc

Farmer

Solution

Question 10

Late prophase

Early metaphase

Late metaphase

Anaphase

Solution

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