Q. No.The length of DNA in a typical mammalian cell is approximately:
| 1. | 1.1 meter | 2. | 1.5 meter |
| 3. | 2.2 meter | 4. | 3.3 meter |
Subtopic: DNA Packaging |
91%
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Histones are:
| 1. | Positively charged and basic amino acids |
| 2. | Negatively charged and basic proteins |
| 3. | Positively charged and acidic proteins |
| 4. | Not found in bacteria |
Subtopic: DNA Packaging |
From NCERT
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Histones are rich in amino acids:
| 1. | Arginine and Lysine |
| 2. | Arginine and Leucine |
| 3. | Arginine and Isoleucine |
| 4. | Aspartate and Glutamate |
Subtopic: DNA Packaging | Solved Problems |
95%
From NCERT
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | A set of positively charged and basic proteins are used in the packaging of Eukaryotic DNA. |
| Reason (R): | DNA molecule is acid and carries a negative charge. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: DNA Packaging |
78%
From NCERT
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A typical nucleosome unit consists of about:
| 1. | 60 base pairs | 2. | 140 base pairs |
| 3. | 200 base pairs | 4. | 400 base pairs |
Subtopic: DNA Packaging |
94%
From NCERT
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The structure of nucleosome is shown below:
1. Statement I is correct, Statement II is incorrect.
2. Statement I is incorrect, Statement II is correct.
3. Statement I is incorrect, Statement II is incorrect.
4. Statement I is correct, Statement II is correct.
| I: | A is H1 histone. |
| II: | B is a tetramer made of histone proteins. |
2. Statement I is incorrect, Statement II is correct.
3. Statement I is incorrect, Statement II is incorrect.
4. Statement I is correct, Statement II is correct.
Subtopic: DNA Packaging |
83%
From NCERT
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Nucleosomes constitute the repeating subunits of a structure in the nucleus called:
| 1. | Nucleoid | 2. | Chromatid |
| 3. | Solenoid | 4. | Chromatin |
Subtopic: DNA Packaging |
73%
From NCERT
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The given figure shows the Electron Microscope ‘beads-on-string’ structure of:
| 1. | Nucleosome | 2. | Solenoid |
| 3. | Filament | 4. | Metaphase chromosome |
Subtopic: DNA Packaging |
93%
From NCERT
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Transcriptionally, active chromatin is termed as:
| 1. | Heterochromatin | 2. | Euchromatin |
| 3. | Prechromatin | 4. | Prochromatin |
Subtopic: DNA Packaging |
91%
From NCERT
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During DNA packaging in eukaryotic cells, Non-Histone Chromosomal proteins:
| 1. | Are not required |
| 2. | Are required from the beginning to the end of the packaging |
| 3. | Are required only for earlier stages of packaging |
| 4. | Are required for a higher level of packaging |
Subtopic: DNA Packaging |
81%
From NCERT
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