Cell Cycle and Cell Division Test

Result

Cell Cycle and Cell Division Test - 82

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

Radioactive thymidine is fed to the cells about to enter S phase. It will make radioactive

A
Euchromatin

B
Heterochromatin

C
Neither euchromatin nor heterochromatin

D
Both euchromatin and heterochromatin

Solution

Euchromatin is loosely packed DNA with higher gene concentration as compared to heterochromatin which is tightly packed and have less gene concentration, thus less DNA content. S phase includes replication of both euchromatin and heterochromatin DNA, the radioactive thymidine will be incorporated in both types of DNA. So, the correct answer is option D.
Question 2
1 / -0

During mitosis, metaphase differs from anaphase in having

A
Same number of chromosomes and half number of chromatids

B
Half number of chromosomes and half number of chromatids

C
Half number of chromosomes and same number of chromatids

D
Same number of chromosomes and same number of chromatids

Solution

Metaphase is the second phase of mitosis. In this phase alignment of chromosomes at the metaphase plate is seen in which the chromosomes are aligned in the center of the cell between each of the mitotic spindle poles.
In anaphase, the third phase of mitosis, there is a shortening of the spindle microtubules. Each chromosome is pulled along by its centromere the two sister chromatids of each chromosome are pulled apart by the spindle and dragged by their kinetochores toward opposite poles of the cell.
Hence the number of chromosomes is half in metaphase as compared to anaphase but the number of chromatids is the same.
Thus the correct answer is option C.
Question 3
1 / -0

A cell in G$$_1$$ of interphase has 12 chromosomes. How many chromosomes and chromatids will be found per cell when this original cell progresses to G$$_2$$ of interphase?

A
$$12$$ chromosomes, $$24$$ Chromatids

B
$$24$$ chromosomes, $$12$$ Chromatids

C
$$30$$ chromosomes, $$25$$ Chromatids

D
$$40$$ chromosomes, $$35$$ Chromatids

Solution

In the G$$_1$$ phase, there are 12 chromosomes. In the S-phase of the cell cycle, the amount of DNA gets doubled. There is doubling of the chromatids but the chromosomes number remains same. The number of chromosomes in the G$$_2$$ phase will be same as 12 chromosomes and the number of chromatids will be 24. Thus, the correct answer is option A.
Question 4
1 / -0

The distribution of genetic material occurs from generation to generation and permits great genetic diversity by frequent re-organisation of genetic complement. This occurs during

A
Mitosis

B
Meiosis

C
Organogenesis

D
Metamorphosis

Solution

Meiosis is a type of cell division that occurs mostly in reproductive cell. It transfers the genetic material from one generation to the other. The crossing over takes place in meiosis which leads to an exchange of genetic material between homologous chromosomes.
So, the correct answer is option B.
Question 5
1 / -0

Which cell is normally produced as a direct result of meiosis?

A
A uterine cell having half the normal species number of chromosomes.

B
An egg having the full species number of chromosomes.

C
A zygote having the full species number of chromosomes.

D
A sperm having half the normal species number of chromosomes.

Solution

The gametes are produced by the meiotic division. Meiosis results in the formation of four haploid cells which can act as gametes. The male gamete is the sperm and the female gamete is the ovum. These gametes possess only half the set of the chromosomes. The fusion of these gametes during fertilisation allows restoring the diploid number of the chromosome in a species.
Thus, the correct answer is option D.
Question 6
1 / -0

The major importance of meiosis lies in

A
The transfer of chromosomes through mitosis

B
Sexual reproduction

C
The maintenance of chromosome number generation after generation

D
The development of mutations

Solution

Meiosis is the cell division which results in the formation of four haploid cells from the diploid parent cell. This is the process involved in sexual reproduction for the formation of gametes. The main importance of this cell division is the restore the chromosome number in every generation. The gametes which are produced are haploid which fuses to form the diploid zygote and helps in the maintenance of the constant chromosome number.
Thus, the correct answer is option C.
Question 7
1 / -0

The four daughter cells that are produced at the end of meiosis are

A
Genetically similar

B
Genetically dissimilar

C
Polynucleate

D
Anucleate

Solution

Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. Meiosis involves the crossing over of chromosomes in prophase 1. This process results in genetic variation and the 4 daughter cells formed at the end of meiosis are genetically dissimilar. Thus the correct answer is option B.
Question 8
1 / -0

In a plant cell, cytokinesis occurs by

A
Separation of the cytoplasm from the periphery to central region

B
Separation of the cytoplasm from cell centre to its periphery

C
Separation of the cytoplasm throughout the equatorial plane simultaneously

D
Furrowing of cytoplasm from two sides at right angles to the plane of spindle pole
Solution
- In plant cells, a new cell wall must form between the daughter cells.
- During telophase, Golgi vesicles are transported on microtubules to form a phragmoplast (a vesicular structure) at the metaphase plate.
- There, the vesicles fuses to form cell plate from the center toward the periphery.
- Thus, separation of cytoplasm i.e. cytokinesis starts from center in a plant cell.
So, the correct answer is option B.
Question 9
1 / -0

There is continuous multiplication in cell nuclei and all nuclei have same genetic information. The cell is undergoing

A
Multiple rounds of karyokinesis, but no cytokinesis

B
Multiple rounds of the M phase, but no rounds of the S phase

C
Multiple rounds of cytokinesis, but no rounds of karyokinesis

D
Multiple rounds of the cell cycle, but no rounds of mitosis

E
multiple rounds of the S phase, but no other phases of the cell cycle

Solution

S phase of cell cycle, is marked by DNA replication and hence, doubles the DNA content of the cell. Since the cell maintains, same DNA content in all nuclei, each S phase is followed by karyokinesis (nuclear division) which in turn increases the number of nuclei but maintains same DNA content in all the formed nuclei.
Cytokinesis is the process of division of cytoplasm, if the cell undergoes cytokinesis, the number of cells would have been increased. Since, there is no increase in cell number, cytokinesis is absent.
Multiple rounds of M phase without any S phase would reduce the DNA content with each division.
Mitosis is the part of the cell cycle, that includes karyokinesis. Multiple rounds of S phase, without any other phase would, increase the DNA content of the cell.
Therefore, the correct answer is option A.
Question 10
1 / -0

The sister chromatids of each chromosome are similar during
I. Beginning of prophase I
II. Beginning of metaphase I
III. End of telophase I

A
I only

B
II only

C
III only

D
I and II

E
II and III

Solution

Crossing over is the process of exchange of genetic material between non-sister chromatids of homologous chromosomes to produce new genetics combinations or variations. It occurs in pachytene of prophase I after which sister chromatids of chromosomes have different genetic combinations. This makes I correct. II and III are incorrect as by the end of prophase I crossing over has been taken place and metaphase I and telophase I are the follow up stages.
Therefore, the correct answer is option A.

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 - 82

Result

Cell Cycle and Cell Division Test - 82

Score

-

Rank

-

SHARING IS CARING

Question 1

Euchromatin

Heterochromatin

Neither euchromatin nor heterochromatin

Both euchromatin and heterochromatin

Solution

Question 2

Same number of chromosomes and half number of chromatids

Half number of chromosomes and half number of chromatids

Half number of chromosomes and same number of chromatids

Same number of chromosomes and same number of chromatids

Solution

Question 3

$$12$$ chromosomes, $$24$$ Chromatids

$$24$$ chromosomes, $$12$$ Chromatids

$$30$$ chromosomes, $$25$$ Chromatids

$$40$$ chromosomes, $$35$$ Chromatids

Solution

Question 4

Mitosis

Meiosis

Organogenesis

Metamorphosis

Solution

Question 5

A uterine cell having half the normal species number of chromosomes.

An egg having the full species number of chromosomes.

A zygote having the full species number of chromosomes.

A sperm having half the normal species number of chromosomes.

Solution

Question 6

The transfer of chromosomes through mitosis

Sexual reproduction

The maintenance of chromosome number generation after generation

The development of mutations

Solution

Question 7

Genetically similar

Genetically dissimilar

Polynucleate

Anucleate

Solution

Question 8

Separation of the cytoplasm from the periphery to central region

Separation of the cytoplasm from cell centre to its periphery

Separation of the cytoplasm throughout the equatorial plane simultaneously

Furrowing of cytoplasm from two sides at right angles to the plane of spindle pole

Solution

Question 9

Multiple rounds of karyokinesis, but no cytokinesis

Multiple rounds of the M phase, but no rounds of the S phase

Multiple rounds of cytokinesis, but no rounds of karyokinesis

Multiple rounds of the cell cycle, but no rounds of mitosis

multiple rounds of the S phase, but no other phases of the cell cycle

Solution

Question 10

I only

II only

III only

I and II

II and III

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.