The correct chronology of stages of karyokinesis in mitosis is:
1. | Prophase – Anaphase – Metaphase – Telophase |
2. | Prophase – Metaphase – Anaphase – Telophase |
3. | Prophase – Metaphase – Telophase – Anaphase |
4. | Telophase – Anaphase – Metaphase – Prophase |
Mitosis is also called ‘equational division’ because:
1. | the number of chromosomes in both daughter cells are the same |
2. | the sum of the number of chromosomes in two daughter cells is equal to the number of chromosomes in the parent cell |
3. | each progeny cell receives only one set of chromosomes from the parent cell |
4. | the number of chromosomes in the parent and the progeny cells is the same |
Prophase of mitosis is not characterized by:
1. | condensation of chromatin |
2. | migration of centrosomes to opposite poles |
3. | formation of mitotic apparatus |
4. | pairing of homologous chromosomes |
The start of the second phase of mitosis, metaphase, is marked by:
1. | complete disintegration of the nuclear envelope |
2. | alignment of chromosomes at the equatorial plate |
3. | de-condensation of chromatin |
4. | reappearance of the nucleolus |
Consider the given two statements:
I: | Morphology of chromosomes is best studied at metaphase |
II: | At this stage, a chromosome is made up of two sister chromatids, held together at the centromere |
1. Both I and II are True and II explains I
2. Both I and II are True but II does not explain I
3. I is True but II is False
4. I is False but II is True
All the following key events take place during telophase of mitosis except:
1. | Chromosomes cluster at the opposite spindle poles |
2. | Chromosomes become discrete |
3. | Nuclear envelope reforms |
4. | Nucleolus, ER and Golgi complex reform |
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 |
Identify the correct statement amongst the following:
1. | Crossing over occurs in prophase I of meiosis and metaphase of mitosis. |
2. | DNA replication occurs once prior to mitosis and twice prior to meiosis. |
3. | Both mitosis and meiosis result in daughter cells identical to the parent cells. |
4. | Karyokinesis occurs once in mitosis and twice in meiosis. |
The components of nuclear envelope are dismantled during:
1. | prophase and reconstructed during telophase |
2. | prophase and reconstructed during anaphase |
3. | metaphase and reconstructed during telophase |
4. | metaphase and reconstructed during anaphase |
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 |