Cell Cycle and Cell Division Test

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Cell Cycle and Cell Division Test - 30

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Question 1
1 / -0

The reappearance of nuclear membrane & nucleolus along with thining & elongation in chromosomes, are diagnostic characters for the phase

A
Anaphase

B
Metaphase

C
Interphase

D
Telophase

Solution

The reappearance of nuclear membrane & nucleolus along with thinning and elongation in chromosomes are diagnostic characters for the telophase. At telophase, the polar microtubules continue to lengthen, elongates the cell even more. A new nuclear envelope, using the membrane vesicles of the parent cell's old nuclear envelope, forms around each set of separated daughter chromosomes and the nucleolus reappears.
So, the correct answer is option D.
Question 2
1 / -0

In which of the following division of centromere occurs?

A
Late prophase or early metaphase

B
Late metaphase or early anaphase

C
Late anaphase or early telophase

D
Late telophase

Solution

Division of centromere occurs in late metaphase or early anaphase. During late metaphase, a chromosome consists of two chromatids, joined together by the centromere, which is further separated during the anaphase due to contraction and relaxation of spindle fibers.
So, the correct answer is option B.
Question 3
1 / -0

Genetic information is transferred from zygote to all body cell by

A
Meiosis

B
Amitosis

C
Endomitosis

D
Mitosis

Solution

Genetic information is transferred from zygote to all body cell by mitosis. The process of mitosis is fast and highly complex. The sequence of events is divided into stages corresponding to the completion of one set of activities and the start of the next. These stages are prophase, prometaphase, 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 D.
Question 4
1 / -0

Meiosis can take place in a

A
Prokaryotic cell

B
Haploid cell

C
Dikaryotic cell

D
Diploid cell

Solution

Meiosis can take place in a diploid cell. In meiosis, division of nucleus twice but replication of DNA only once. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells with half the number of chromosomes as the original parent cell. The two meiotic divisions are known as meiosis I and meiosis II. Before meiosis begins, during S phase of the cell cycle, the DNA of each chromosome is replicated so that it consists of two identical sister chromatids attached at a centromere.
Question 5
1 / -0

What happens in synthesis phase during cell cycle?

A
DNA synthesis

B
Chromosome number becomes double

C
Formation of two nuclei

D
Synthesis of proteins & RNA

Solution

Cell duplicates its contents before the division. The s phase is characterized by synthesis of DNA where the DNA undergoes replication. It occurs between G$$_1$$ phase and G$$_2$$ phase. DNA replication is necessary to prevent genetic abnormalities which often lead to cell death or disease. It also helps in production of similar daughter cells.
So, the correct answer is option A.
Question 6
1 / -0

In animals, cytokinesis is

A
Centrifugal

B
Centripetal

C
Random

D
Collateral

Solution

In animals, cytokinesis is centripetal. In animal cells, cytokinesis is accomplished by furrow formation which starts from the cell membrane. In this process cleavage of cytoplasm takes place. Thus, in animal cells, cytokinesis starts from the periphery and moves towards the centre, i.e., centripetal.
So, the correct answer is 'Centripetal'
Question 7
1 / -0

Which of the following statement is correct regarding meiosis?

A
Division of nucleus twice but replication of DNA only once

B
Division of nucleus is twice and replication of DNA twice

C
Division of nucleus once and replication of DNA is also once

D
Division of nucleus once and DNA replication is twice

Solution

In meiosis, division of nucleus twice but replication of DNA only once. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells with half the number of chromosomes as the original parent cell. The two meiotic divisions are known as meiosis I and meiosis II. Before meiosis begins, during S phase of the cell cycle, the DNA of each chromosome is replicated so that it consists of two identical sister chromatids attached at a centromere.
So, the correct answer is option A.
Question 8
1 / -0

.......... reorganizes the nucleolus during the telophase.

A
Secondary constriction I

B
Secondary constriction II

C
Primary constriction

D
Pore complex

Solution

Secondary constriction I reorganize the nucleolus during telophase. During telophase, the effects of prophase and prometaphase are reversed. Two daughter nuclei form the nuclear lamina at the ends of the cell, forming nuclear envelopes around each nucleus. As the nuclear membranes reform around each set of chromatids, the nucleoli also reappear. The chromosomes also unwind back into the expanded chromatin that is present during interphase.
So, the correct answer is option A.
Question 9
1 / -0

............... is associated with cell division.

A
Microsome

B
Microbody

C
Microtubule

D
Microfibril

Solution

Microsomes are vesicle which is reformed from pieces of the endoplasmic reticulum (ER) when eukaryotic cells are broken up in the laboratory.
A microbody is a type of organelle that is found in the cells of plants, protozoa, and animals. Organelles in the microbody family include peroxisomes, glyoxysomes, glycosomes, and hydrogenosomes. In vertebrates, microbodies are especially prevalent in the liver and kidney organs.
A microfibril is a very fine fibril, or fiber-like strand, consisting of glycoproteins and cellulose. It is usually, but not always, used as a general term for describing the structure of protein fiber, e.g. hair and sperm tail. Microtubules are a filamentous intracellular structure that is responsible for various kinds of movements in all eukaryotic cells. Microtubules are involved in cell division, an organization of intracellular structure, and intracellular transport, as well as ciliary and flagellar motility.
So, the correct answer is option C.
Question 10
1 / -0

In mitosis, the spindle is

A
Bipolar

B
Multipolar

C
Apolar

D
Random

Solution

In mitosis, the spindle is bipolar. It is a spindle-shaped structure that develops outside the nucleus during mitosis. The fibers that constitute the mitotic spindle pull the chromatids apart towards the opposite poles. Thus, forming two poles in a single spindle. Therefore we say that the mitotic spindle is bipolar.
So, the correct answer is option A.

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Cell Cycle and Cell Division Test - 30

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Cell Cycle and Cell Division Test - 30

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Question 1

Anaphase

Metaphase

Interphase

Telophase

Solution

Question 2

Late prophase or early metaphase

Late metaphase or early anaphase

Late anaphase or early telophase

Late telophase

Solution

Question 3

Meiosis

Amitosis

Endomitosis

Mitosis

Solution

Question 4

Prokaryotic cell

Haploid cell

Dikaryotic cell

Diploid cell

Solution

Question 5

DNA synthesis

Chromosome number becomes double

Formation of two nuclei

Synthesis of proteins & RNA

Solution

Question 6

Centrifugal

Centripetal

Random

Collateral

Solution

Question 7

Division of nucleus twice but replication of DNA only once

Division of nucleus is twice and replication of DNA twice

Division of nucleus once and replication of DNA is also once

Division of nucleus once and DNA replication is twice

Solution

Question 8

Secondary constriction I

Secondary constriction II

Primary constriction

Pore complex

Solution

Question 9

Microsome

Microbody

Microtubule

Microfibril

Solution

Question 10

Bipolar

Multipolar

Apolar

Random

Solution

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