Cell Cycle and Cell Division Test

Result

Cell Cycle and Cell Division Test - 74

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Meiosis occurs in _________.

A
Haploid cells

B
Mostly haploid cells but occasionally in diploid cells

C
Diploid cells

D
Mostly diploid cells but occasionally in haploid cells

Solution

Meiosis is a special type of cell division, a process where a single cell divides two times to produce four haploid cells, each not only containing half the original amount of genetic information but also genetically distinct from the parent cell that gave rise to them. This process occurs in all sexually reproducing single-celled and multicellular eukaryotes including animals, plants and fungi. Meiosis produces our sex cells or gametes (eggs in females and sperm in males, both haploid cells). When a sperm and an egg join in fertilization, the two haploid sets of chromosomes form a complete diploid set which gives rise to a new genome. Therefore, in meiosis, a diploid cell (2n; one that has two sets of chromosomes), becomes a haploid cell (n; one that has one set of chromosomes). Therefore, it is a very important process because errors in this result in aneuploidy, developmental abnormalities etc.
The correct answer is option C.
Question 2
1 / -0

During $$ G_1$$ phase of cell cycle, the cell increases its supply of ________ .

A
oxygen

B
$$CO_2$$

C
water

D
proteins
Solution
- The G₁ phase, gap 1 phase, or growth 1 phase, is the first of four phases of the cell cycle that takes place in eukaryotic cell division.
- In this phase, the cell increases its supply of proteins, increases the number of organelles (such as mitochondria, ribosomes), and grows in size.
So, the correct answer is option D.
Question 3
1 / -0

Which of the following statements is TRUE?

A
In telophase, the endoplasmic reticulum reform.

B
In prophase, the sister chromatids separate

C
In metaphase, the sister chromatids begin condensation

D
All of the above
Solution
- In telophase, the two chromosomes elongate and overlap one another to form chromatin. A nuclear envelope appears on its outside from pieces of the older nuclear envelope and annulated endoplasmic reticulum. The golgi complex and endoplasmic reticulum are reformed.
- In prophase, the condensation of chromosomal material. The chromosomal material becomes untangled during the process of chromatin condensation. Chromosomes are seen to be composed of two chromatids attached together at the centromere.
- In metaphase, the spindle fibres are attached to the kinetochores of chromosomes. Chromosomes are moved to the spindle equator and get aligned along with the metaphase plate through spindle fibres to both poles.
- So, the correct answer is option A.
Question 4
1 / -0

During which phase(s) of cell cycle, amount of DNA in a cell remains at $$4$$C level if the initial amount is denoted as $$2$$C?

A
$$G_2$$ and M

B
$$G_0$$ and $$G_1$$

C
$$G_1$$ and S

D
Only $$G_2$$

Solution

In M-phase, both 4C and 2C of DNA are present in different stages. S phase marks the period during which the amount of DNA in the cell doubles. Thus, at $$G_2$$ phase the amount of DNA is 4C. These doubled cellular contents prepare the cell to sustain in the further mitotic division.
Thus A is the correct option.
Question 5
1 / -0

During meiosis-I, homologous chromosomes of one pair switch their position without affecting the position of another pair. This is known as?

A
Segregation

B
Separation

C
Co-dominance

D
Independent assortment

Solution

A. Segregation
EXPLANATION: The homologous chromosomes, with their different versions of each gene, are randomly segregated into daughter nuclei, resulting in a variety of possible genetic arrangements during meiosis-I. Genes that are on different chromosomes assort independently.
Question 6
1 / -0

Which of the following statements is correct?

A
Animals can show mitotic divisions in both haploid and diploid cells

B
After S phase the number of chromosomes becomes double i.e., $$2n$$ to $$4n$$

C
During the $$G_2$$ phase, proteins are synthesised in preparation for mitosis while cell growth continues.

D
S or synthesis phase marks the period during which RNA synthesis takes place

Solution

G2 phase is a period of rapid cell growth and protein synthesis during which the cell prepares itself for mitosis. It is the third subphase of interphase in the cell cycle directly preceding mitosis.
Thus, the correct answer is option C.
Question 7
1 / -0

Cell would normally proceed to mitosis without interrupt.

A
Once it has entered the S phase

B
Once it has entered the $$G_2$$ phase

C
At any time during cell division activity

D
None of these

Solution

A. Once it has entered the S phase
EXPLANATION: Cell would normally proceed to mitosis without interruption, once it has entered the S phase, where DNA doubling or replication takes place.
Question 8
1 / -0

DNA polymerase in most active in which phase of the cell cycle?

A
$$G_2$$ phase

B
$$G_1$$ phase

C
S phase

D
M phase

Solution

C. S phase
EXPLANATION: DNA polymerase is most active in S phase. The most important event occurring in S phase is the replication of DNA and DNA polymerase is responsible for DNA replication. Thus its activity is maximum during S phase.
Question 9
1 / -0

The number of meiosis required to produce $$10$$ seeds of Cyperus is?

A
$$20$$

B
$$13$$

C
$$1.25$$

D
$$2.5$$

Solution

For the formation of 10 seeds, 10 egg cells and 10 pollen grains are required.
The pollen mother cell produces 4 pollen grains, but 3 of them degenerate.
Hence for 10 pollen grains to be formed, 10 divisions are required in Cyperus.
Total number of meiotic divisions required to produce 10 seeds in Cyperus = No. of divisions required for egg cells + No. of divisions required for pollen grains
=10+10
=20
So the correct answer is option A.
Question 10
1 / -0

The DNA content of individual cells and the number of cells in each phase of a "cell cycle" can be determined using flow cytometry. Which of the following combinations of "phase of a cell cycle and its corresponding DNA content" can be considered normal?
(i) Diploid cells found in the $$G_0$$ or $$G_1$$ phase.
(ii) Cells with twice the normal DNA content in the early M phase.
(iii) Cells with intermediate amounts of DNA in the S phase.
(iv) Cells with twice the normal DNA content in the $$G_2$$ phase.

A
(i) and (ii)

B
(ii) and (iii)

C
(iii) and (iv)

D
(i), (ii), (iii) and (iv)

Solution

D. (i), (ii), (iii) and (iv)
Solution : The diploid cells found in the G0 and G1 phase before starting the G2 or M phase but before anaphase. Cells with twice the normal DNA is in G2 or M phase that is mitosis phase. The S phase is characterized by intermediate DNA when the DNA starts replicating itself, till the entire replication process is complete.
So the correct answer is " (i), (ii), (iii) and (iv)".

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Cell Cycle and Cell Division Test - 74

Result

Cell Cycle and Cell Division Test - 74

Score

-

Rank

-

SHARING IS CARING

Question 1

Haploid cells

Mostly haploid cells but occasionally in diploid cells

Diploid cells

Mostly diploid cells but occasionally in haploid cells

Solution

Question 2

oxygen

$$CO_2$$

water

proteins

Solution

Question 3

In telophase, the endoplasmic reticulum reform.

In prophase, the sister chromatids separate

In metaphase, the sister chromatids begin condensation

All of the above

Solution

Question 4

$$G_2$$ and M

$$G_0$$ and $$G_1$$

$$G_1$$ and S

Only $$G_2$$

Solution

Question 5

Segregation

Separation

Co-dominance

Independent assortment

Solution

Question 6

Animals can show mitotic divisions in both haploid and diploid cells

After S phase the number of chromosomes becomes double i.e., $$2n$$ to $$4n$$

During the $$G_2$$ phase, proteins are synthesised in preparation for mitosis while cell growth continues.

S or synthesis phase marks the period during which RNA synthesis takes place

Solution

Question 7

Once it has entered the S phase

Once it has entered the $$G_2$$ phase

At any time during cell division activity

None of these

Solution

Question 8

$$G_2$$ phase

$$G_1$$ phase

S phase

M phase

Solution

Question 9

$$20$$

$$13$$

$$1.25$$

$$2.5$$

Solution

Question 10

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

(i), (ii), (iii) and (iv)

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.