The length of DNA in a typical mammalian cell is approximately:

1.1.1 meter2.1.5 meter
3.2.2 meter4.3.3 meter

Subtopic:  DNA Packaging |
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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 |
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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 |
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
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.
In the light of the above statements, choose the most appropriate answer from the options given below :
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 |
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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 |
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The structure of nucleosome is shown below:
 
I: A is H1 histone.
II: B is a tetramer made of histone proteins.

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.
Subtopic:  DNA Packaging |
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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 |
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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 |
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Transcriptionally, active chromatin is termed as:

1. Heterochromatin 2. Euchromatin
3. Prechromatin 4. Prochromatin

Subtopic:  DNA Packaging |
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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 |
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