Mitotic Phase

Q. Which of the following options gives the correct sequence of events during mitosis?

1. Condensation $\to$ Nuclear membrane disassembly $\to$ Arrangement at equator $\to$ Centromere division $\to$ Segregation $\to$ Telophase
2. Condensation $\to$ Crossing over $\to$ Nuclear membrane disassembly $\to$ Segregation $\to$ telophase
3. Condensation $\to$ Arrangement at equator $\to$ Centromere division $\to$ Segregation $\to$ Telophase
4. Condensation $\to$ Nuclear membrane disassembly $\to$ Crossing over $\to$ Segregation $\to$ telophase

Q. What would happen if the nuclear division is not followed by cytokinesis during mitosis?

1. Two cells, each with one nucleus is formed
2. Two cells without nucleus are formed
3. One cell with 2 nuclei is formed
4. One cell without a nucleus is formed

Q. The sex organs of bryophytes produce gametes by

1. meiosis
2. mitosis
3. amitosis
4. multiple fission

Q.

What is the stage between two meiotic divisions called?

Q.

When does Cytokinesis begin and end in mitosis?

1. From Metaphase to Anaphase

2. End of Metaphase to beginning of Anaphase

3. During Anaphase to the end of Telophase

4. Telophase

Q.

What happens to the nuclear envelope in telophase?

Q. Mitosis does not include the division of

1. nucleus
2. cytoplasm
3. centrioles
4. none of these

Q. A cell has a division time of 1 minute. If in 20 minutes it could fill a culture flask by $\frac{1}{8th}$ of its volume, then by what time would the total flask be filled?

1. 160 mins
2. 21 mins
3. 80 mins
4. 23 mins

Q.

The cell prepares for cytokinesis in which of the following phases?

1. $G_1$ phase

2. $G_0$ phase

3. S phase

4. $G_2$ phase

Q. Identify the correct statement with regard to $G_1$ phase (Gap I) of interphase.

1. DNA synthesis or replication takes place
2. Nuclear division takes place
3. Cell is metabolically active, grows but does not replicate its DNA
4. Reorganisation of all cell components takes place

Q. The number of mitotic cell divisions required to produce 256 cells from single cell would be

1. 10
2. 12
3. 6
4. 8

Q. Which of the following does not occur during the M phase of cell cycle?

1. Nuclear division
2. Cytoplasmic division
3. Duplication of centrioles
4. Formation of cell plate

Q.

This graph is a typical cell cycle representing DNA content of various phases (1 to 4). Identify the phases based on changes in the DNA content and select the correct option.

1. M, G${}_1$, S, G${}_2$.

2. G${}_2$, M, G${}_1$, S.

3. S, G${}_2$, M, G${}_1$.

4. G${}_1$, S, G${}_2$, M.

Q. Assertion: M-phase is the most dramatic period of the cell cycle.
Reason: It involves a major reorganisation of virtually all components of the cell.

Select the correct options:

1. Both assertion & reason are true & the reason is a correct explanation of the assertion.
2. Both assertion & reason are true but reason is not a correct explanation of the assertion.
3. Assertion is true but the reason is false.
4. Both assertion & reason are false.

Q. Mitotic stages cannot be studied in

1. Saccharomyces
2. E. coli
3. Chlorella
4. Plasmodium

Q. What would happen if the nuclear division is not followed by cytokinesis during mitosis?

1. Two cells, each with one nucleus is formed
2. Two cells without nucleus are formed
3. One cell with 2 nuclei is formed
4. One cell without a nucleus is formed

Q.

Which two processes together constitute the M phase of the cell cycle?

1. Interphase and mitosis

2. Mitosis and cytokinesis

3. Interphase and metaphase

4. G0, S and G1 phase

Q. How many divisions of mitosis are required for a somatic cell to form 256 cells?

1. 4
2. 8
3. 16
4. 32

Q.

Cytoplasmic division of a cell is called:

1. Cell plate formation

2. Mitosis

3. Cytokinesis

4. Synapsis

Q. Anaphase Promoting Complex (APC) is a protein complex that tags some proteins involved in cell cycle for degradation. If APC is non-functional in a human cell, which of the following is an expected outcome?

1. Chromosomes will be fragmented
2. Chromosomes will not segregate
3. Recombination of chromosomes
4. Absence of chromosome condensation

Q. Nucleo-cytoplasmic ratio in eukaryotes is restored by

1. meiosis
2. mitosis
3. both mitosis and meiosis
4. neither mitosis nor meiosis

Q. Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle:

1. Transcription from chromosomes and reassembly of the nuclear lamina
2. Formation of the contractile ring and formation of the phragmoplast
3. Formation of the contractile ring and transcription from chromosomes
4. Decondensation from chromosomes and reassembly of the nuclear lamina

Q. All the following are the significances of equational division except:

1. Growth of multicellular organisms and cell repair/replacement
2. Maintenance of the constant number of chromosomes generation to generation
3. Maintenance of the same number of chromosomes cell to cell
4. Restoration of nucleo-cytoplasmic ratio of cells