Q. No.The Mitotic [M] phase of a typical eukaryotic cell is divided into:
1.
Two stages
2.
Three stages
3.
Four stages
4.
Five stages
During which stage of mitosis do the following events occur?
I. Centromeres split and chromatids separate
II. Chromatids move to opposite poles
| 1. | Prophase | 2. | Metaphase |
| 3. | Anaphase | 4. | Telophase |
Which of the following is not a continuous process during cell cycle?
1. Synthesis of DNA
2. Cell growth
3. Metabolism
4. Both cell growth and metabolism
Match each item in Column I with one in Column II and select the correct answer from the codes given below:
|
Column I |
|
Column II |
|
|
A |
Zygotene |
a |
Pairing of homologous chromosomes |
|
B |
Pachytene |
b |
Appearance of chiasma |
|
C |
Diplotene |
c |
Terminalization of chiasma |
|
D |
Diakinesis |
d |
Crossing over |
Codes:
| A | B | C | D | |
| 1. | a | c | b | d |
| 2. | a | d | b | c |
| 3. | a | b | c | d |
| 4. | b | c | d | a |
The cell shown in the given diagram is in:
 |
|
Identify the incorrect statement:
| 1. | The nuclear membrane and nucleolus reappear during Telophase I |
| 2. | The nuclear membrane disappears by the end of Prophase II |
| 3. | DNA replicates during interkinesis between meiosis I and meiosis II |
| 4. | Chromosomes do not reach the extremely extended state of interphase nucleus |
All the following are significances of mitosis except:
1. Restoration of nuclear/cytoplasmic ratio
2. Growth of living organisms
3. Replacement of lost cells
4. Generation of genetic variation
The key features of meiosis include all the following except:
| 1. | Pairing of heterologous chromosomes |
| 2. | Crossing over between non sister chromatids of homologous chromosomes |
| 3. | Four haploid cells produced at the end of the second division |
| 4. | Initiated after DNA replication in S phase |
The correct chronology of stages of Prophase I is:
1. Leptotene – Zygotene – Pachytene – Diplotene – Diakinesis
2. Leptotene – Pachytene – Zygotene – Diplotene – Diakinesis
3. Leptotene – Zygotene – Pachytene – Diakinesis – Diplotene
4. Zygotene – Leptotene – Pachytene – Diakinesis – Diplotene
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