Cell Cycle and Cell Division Test

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Cell Cycle and Cell Division Test - 71

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Question 1
1 / -0

Number of chromatids at metaphase is?

A
One in mitosis and two in meiosis

B
Two in mitosis and one in meiosis

C
Two in mitosis and four in meiosis

D
Two each in mitosis and meiosis

Solution

Meiosis II follows the same division of mitosis, except that there are only half as many chromosomes.so, the 23 chromatid pairs from the previous cells split equally, so each daughter gets 23 chromatids exactly, which correspond to 23 chromosomes.
So, the correct option is 'Two in mitosis and one in meiosis'.
Question 2
1 / -0

Cytokinesis is a division of:

A
Cytoplasm

B
Nucleus

C
chromosomes

D
Nucleolus

Solution

Cytokinesis is the process of division of Cytoplasm. "Kinesis" means division and "cyto" refers to cytoplasm. it occurs during cell division. It is variable from plant cells to animal cells.
So, the correct option is 'Cytoplasm'.
Question 3
1 / -0

Spindle fibres are organised with the help of calcium bound protein called?

A
Casein

B
Calmodulin

C
Calcium pectate

D
All of these
Solution
- Spindle fibers form a protein structure that divides the genetic mateial in a cell.
- The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis.
So, the correct option is 'Casein'.
Question 4
1 / -0

A cell divides in order to?

A
Maintain size of nucleus

B
Maintain bulk of cytoplasm

C
Maintain balance between bulk of cytoplasm and nucleus

D
Maintain size of chromosomes

Solution

Early in the history of biology, scientists believed cells arose spontaneously. With the development of cell theory, people finally realized that only cells can beget other cells. In fact, two categories that define something as living or not are growth and reproduction, both of which cell division accomplishes. Cell division, also called mitosis, occurs in all living things. As living things grow, some cells die or become damaged and need replacements. Some single-celled organisms use a type of mitosis as their only form of reproduction. In multicellular organisms, cell division allows individuals to grow and change by expanding the number of total cells. The division of the nucleus is equal during cell division. This ensures the characteristic of both parent cell in daughter cells and restores the size of the nucleus.

So, the correct option is 'maintain size of nucleus'
Question 5
1 / -0

Regarding Meiosis

A
Occurs in reproductive cells

B
Maintain haploid number of chromosomes

C
Variation occurs

D
Occurs in all sexual reproduction

Solution

Meiosis is a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
So the correct option is 'Occurs in reproductive cells'.
Question 6
1 / -0

The DNA content of a gametic cell in a sexually reproducing plant is 1 C. What will be the DNA content of a sporogenous cells in the anther after $$G_2$$ phase ?

A
C

B
2C

C
4C

D
$$\dfrac{1}{2} C$$

Solution

In G$$_1$$ phase the DNA is C, in S phase it will replicate and form 2C, it will remain same till G$$_2$$ phase. After G$$_2$$ phase the cells will divide into two and divide the DNA into two equal halves.

So, the correct answer is ' A'.
Question 7
1 / -0

When a cell stops growing say due to shortage of nutrients, this will occur in which phase of the cell cycle?

A
$$G_1$$ phase

B
S phase

C
$$G_2$$ phase

D
M phase

Solution

At the G1 phase of the cell cycle, the cell decides whether the cell will continue to divide or will enter a dormant stage called the G0 stage. If sufficient nutrients are not present the cell will enter this dormant stage of the cell cycle. If however, sufficient growth hormones and proteins are present the cell will continue through the cycle and enter the S phase.
So, the correct answer is option A.
Question 8
1 / -0

Which statement is incorrect about $$G_0$$ phase?

A
Mitosis occur after $$G_0$$ phase X

B
Bio catalysts can be used to speed up $$G_0$$ phase

C
Cell volume keeps on increasing

D
Cell metabolism occurs continuous

Solution

G$$_0$$ is the resting phase of the cell cycle and is sometimes also referred to as a "post-mitotic" state since cells in this phase have left the cycle and stopped dividing. Cells remain in this phase until there is a reason for them to divide. On being stimulated to divide again, the cells enter the G1 phase of the cell cycle.
So, the correct option is 'Mitosis occurs after G0 phase'.
Question 9
1 / -0

The number of daughter cells formed at the end of meiosis from a cell are:

A
2 Haploid cells

B
2 Diploid cells

C
4 Haploid cells

D
4 Diploid cells
Solution
- Meiosis is a type of cell division that reduces the number of chromosomes present in the parent cell by half and produces four gamete cells.
- This process is required to produce egg and sperm cells for sexual reproduction.
- Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome. The parent cell undergoes one round of DNA replication followed by two separate cycles of nuclear and cytoplasmic division.
- The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.
So, the correct option is '4 Haploid cells'.
Question 10
1 / -0

One meiosis produces how many male gametes

A
$$4$$

B
$$2$$

C
$$1$$

D
$$8$$

Solution

Meiosis a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores. So it will result in the 4 haploid gametes. So the correct option is '4’.

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Re-Attempt Weekly Quiz Competition

Cell Cycle and Cell Division Test - 71

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Cell Cycle and Cell Division Test - 71

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Question 1

One in mitosis and two in meiosis

Two in mitosis and one in meiosis

Two in mitosis and four in meiosis

Two each in mitosis and meiosis

Solution

Question 2

Cytoplasm

Nucleus

chromosomes

Nucleolus

Solution

Question 3

Casein

Calmodulin

Calcium pectate

All of these

Solution

Question 4

Maintain size of nucleus

Maintain bulk of cytoplasm

Maintain balance between bulk of cytoplasm and nucleus

Maintain size of chromosomes

Solution

Question 5

Occurs in reproductive cells

Maintain haploid number of chromosomes

Variation occurs

Occurs in all sexual reproduction

Solution

Question 6

C

2C

4C

$$\dfrac{1}{2} C$$

Solution

Question 7

$$G_1$$ phase

S phase

$$G_2$$ phase

M phase

Solution

Question 8

Mitosis occur after $$G_0$$ phase X

Bio catalysts can be used to speed up $$G_0$$ phase

Cell volume keeps on increasing

Cell metabolism occurs continuous

Solution

Question 9

2 Haploid cells

2 Diploid cells

4 Haploid cells

4 Diploid cells

Solution

Question 10

$$4$$

$$2$$

$$1$$

$$8$$

Solution

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