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 |
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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 |
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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 |
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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. |
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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 |
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I: | A is H1 histone. |
II: | B is a tetramer made of histone proteins. |
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Nucleosomes constitute the repeating subunits of a structure in the nucleus called:
1. | Nucleoid | 2. | Chromatid |
3. | Solenoid | 4. | Chromatin |
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1. | Nucleosome | 2. | Solenoid |
3. | Filament | 4. | Metaphase chromosome |
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Transcriptionally, active chromatin is termed as:
1. | Heterochromatin | 2. | Euchromatin |
3. | Prechromatin | 4. | Prochromatin |
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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 |
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