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.

The resting phase of mitosis is called interphase.

1. True
2. False

Q.

What is the longest phase of a cell cycle?

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.

Somatic and stem cells undergo

Q.

Synapsis of homologous chromosomes takes place during

1. Diplotene

2. Pachytene

3. Leptotene

4. Zygotene

Q. Which of the following options represents the phases of mitosis in the sequence of occurrence?

1. Prophase, anaphase, metaphase, telophase
2. Prophase, metaphase, anaphase, telophase
3. Anaphase, prophase, metaphase, telophase
4. Prophase, anaphase, telophase, metaphase

Q.

Which of the following statements is incorrect about the G₀ phase?

1. Mitosis occurs after the G₀ phase.

2. Biocatalysts can be used to exit the G₀ phase.

3. Cell metabolism occurs continuously in the G₀ phase.

4. Cell volume goes on increasing during the G₀ phase.

Q.

What happens in the G₁ checkpoint?

Q. A few differences between mitosis and meiosis have been given in the table below. Fill in the blanks using the options given.

$\begin{array}{ccc}& \text{Mitosis}& \text{Meiosis}\\ \text{Number of cell divisions}& 1& \text{(i)}\underset{–}{}\\ \text{Recombination of genetic material}& \text{(ii)}\underset{–}{}& \text{(iii)}\underset{–}{}\\ \text{Ploidy of the parent cell}& \text{2n}& \text{2n}\\ \text{Ploidy of the daughter cells}& \text{2n}& \text{(iv)}\underset{–}{}\end{array}$

1. (i) - 2; (ii) - Absent; (iii) - Present; (iv) - n
2. (i) - 1; (i) Absent; (iii) - Present; (iv) - 2n
3. (i) - 2; (ii) - Absent; (iii) - Present; (iv) - 2n
4. (i) - 1; (ii) - Present; (iii) - Present; (iv) - n

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

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

Q.

Which of the following is the correct sequence for a meiotic cell cycle?

1. G₂ → G₁→ S →M →G₂

2. G₁→ G₂→ S →M →G₂

3. G₁→ S →G₂→ M →G₁

4. S→ G₁→ G₂→ M →S

Q.

Which is the best material for the study of mitosis in the laboratory?

Q.

Match the following stages during Mitotic cell division with the key changes:

$$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{i. Prophase}& \text{a. Formation of 2 daughter cells, preparation for next division.}\\ \text{ii. Metaphase}& \text{b. Organelles disappear, formation of chromosomes.}\\ \text{iii. Anaphase}& \text{c. Spindle fibres, chromosomes at equatorial plate.}\\ \text{iv. Telophase}& \text{d. Splitting of chromatids, chromosomes move towards poles.}\\ \text{v. Interphase}& \text{e. Spindle fibres disappear, Cytokinesis follows.}\end{array}$$

1. i).$\to$ b., ii).$\to$ c., iii).$\to$ d., iv). $\to$ e., v). $\to$ a.
2. i).$\to$ d., ii).$\to$ b., iii).$\to$ e., iv). $\to$ a., v). $\to$ c.
3. i).$\to$ c., ii).$\to$ d., iii).$\to$ a., iv). $\to$ b., v).$\to$ e.
4. i).$\to$ a., ii).$\to$ e., iii).$\to$ c., iv). $\to$ d., v). $\to$ b.

Q. In some organisms, karyokinesis is not followed by cytokinesis and it results in the formation of multinucleate cells called

Q.

Which stages of cell division do the figures A and B represent?

1. A: Prophase; B: Anaphase

2. A: Metaphase; B: Telophase

3. A: Telophase; B: Metaphase

4. A: Late anaphase; B: Prophase

Q. A parent cell with 24 chromosomes undergoes mitosis and produces ______ daughter cells, each with ______ chromosomes.

1. 4, 12
2. 2, 24
3. 4, 24
4. 2, 12

Q.

Cytoplasmic division of a cell is called:

1. Cell plate formation

2. Mitosis

3. Cytokinesis

4. Synapsis

Q. Nucleo-cytoplasmic ratio in eukaryotes is restored by

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

Q. Mitosis is called equational division because

1. both the parent cell and daughter cell have same number of chromosomes
2. parent cell forms two daughter cells
3. it occurs in all somatic cells
4. both a and b

Q.

How do prokaryotes grow?

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.

Q. Mitosis phase (M phase) of cell cycle includes

1. G${}_1$, S and G${}_2$ phases
2. prophase, metaphase, anaphase, telophase
3. interphase, prophase, metaphase, anaphase, telophase
4. karyokinesis and cytokinesis

Q.

How is a prokaryotic cell different from a eukaryotic cell?

Q. Identify the parts labelled A-F and select the correct option.

1. A - Seminiferous tubules, B- Rete testis, C- Cauda epididymis, D- Corpus epididymis, E- Caput epididymis, F- Vas deferens
2. A -Vas deferens, B- Caput epididymis, C- Rete testis, D- Corpus epididymis, E- Cauda epididymis, F- Seminiferous tubules
3. A -Vas deferens, B- Cauda epididymis, C- Rete testis, D- Corpus epididymis, E- Caput epididymis, F- Seminiferous tubules
4. A - Seminiferous tubules, B- Vas deferens, C- Cauda epididymis, D- Corpus epididymis, E- Caput epididymis, F- Rete testis

Q. A cell can function properly and divide mitotically even in the absence of

1. plasma membrane
2. cytoskeleton
3. mitochondria
4. plastids

Q.

Chloroplasts are externally covered by

1. Chloroplast envelope

2. Chloroplast lamina

3. Peritoneum

4. Cutaneous membrane

Q. Mitosis in organism helps

1. In reducing chromosome number to half in the gamete
2. In formation of new combination of chromosomes
3. To restore the nucleocytoplasmic ratio
4. In producing haploid gametes for sexual reproduction in diploid ones

Q. More than One Answer Type
एक से अधिक उत्तर प्रकार के प्रश्न

Cytokinesis in plant cell

पादप कोशिका में कोशिकाद्रव्य विभाजन

1. Is achieved by formation of cell plate
   
   कोशिका पट्टी के निर्माण द्वारा होता है
2. Occurs by formation of furrow
   
   खाँच के निर्माण द्वारा होता है
3. Starts at periphery of cell
   
   कोशिका की परिधि पर आरंभ होता है
4. Starts at centre of cell
   
   कोशिका के केंद्र पर आरंभ होता है