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Q. No.If a cell had 2N chromosomes and 2C DNA content in G1 phase, what would be the corresponding values at the end of the S phase?
1. 2N, 2C
2. 4N, 2C
3. 2N, 4C
4. 4N, 4C
Subtopic: Intro to Cell Cycle & Interphase |
89%
From NCERT
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Consider the two statements:
| Statement I: | The interphase represents the phase between two successive M phases and DNA replication takes place in the interphase. |
| Statement II: | The stage between the two meiotic divisions is called interkinesis and there is no replication of DNA during interkinesis. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Intro to Cell Cycle & Interphase |
78%
From NCERT
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Match the stage of Prophase I given in Column I with the corresponding event in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A | Zygotene | P | Terminalisation of chiasmata |
| B | Pachytene | Q | Appearance of chiasmata |
| C | Diplotene | R | Crossing over |
| D | Diakinesis | S | Pairing of homologues |
| A | B | C | D | |
| 1. | Q | R | P | S |
| 2. | S | R | Q | P |
| 3. | Q | S | R | P |
| 4. | R | S | P | Q |
Subtopic: Cell Cycle: Meiosis I |
89%
From NCERT
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In the 24 hour average duration of cell cycle of a human cell, cell division properly lasts for:
1. only about 1 hour
2. approximately 90 minutes
3. between 4 and 5 hours
4. 95% time of the cell cycle
1. only about 1 hour
2. approximately 90 minutes
3. between 4 and 5 hours
4. 95% time of the cell cycle
Subtopic: Intro to Cell Cycle & Interphase |
84%
From NCERT
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In animal cells, during the S phase:
| I: | DNA replication begins in the cytoplasm |
| II: | The centriole duplicates in the nucleus |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) |
64%
From NCERT
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Consider the two statements:
| Statement I: | Mitosis helps in restoration of nuclear cytoplasmic ratio for effective working of a cell. |
| Statement II: | Mitosis leads to formation of genetically diverse cells leading to generation of variations. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement II is incorrect; Statement I is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
85%
From NCERT
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A cell has 2 pg DNA at G1 phase. What would be the amount of DNA in this cell at the end of anaphase I of meiosis I?
1. 2 pg
2. 4 pg
3. 6 pg
4. 8 pg
1. 2 pg
2. 4 pg
3. 6 pg
4. 8 pg
Subtopic: Intro to Cell Cycle & Interphase |
64%
From NCERT
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During diakinesis of prophase I:
The correct statements are:
1. I, II and III
2. I and II only
3. I and III only
4. II and III only
| I: | Terminalisation of chiasmata takes place. |
| II: | Meiotic spindle is assembled. |
| III: | Nucleolus disappears and the nuclear membrane breaks down. |
1. I, II and III
2. I and II only
3. I and III only
4. II and III only
Subtopic: Cell Cycle: Meiosis I |
68%
From NCERT
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The onion root tip cell has 16 chromosomes (2n). What would be the number of chromosomes in this cell after the S phase and at the end of mitotic anaphase, respectively?
1. 16 and 16
2. 16 and 32
3. 8 and 16
4. 16 and 8
1. 16 and 16
2. 16 and 32
3. 8 and 16
4. 16 and 8
Subtopic: Intro to Cell Cycle & Interphase |
53%
From NCERT
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Among eukaryotes, replication of DNA takes place in:
| 1. | G2 Phase | 2. | M phase |
| 3. | S phase | 4. | G1 phase |
Subtopic: Intro to Cell Cycle & Interphase |
90%
From NCERT
NEET - 2023
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