Which one of the following statements about the particular entity is true:
 

What process causes shortening of telomeres during cell division?
1. DNA synthesis.
2. Exonuclease removal of primers.
3. Ligation of DNA fragments.
4. Telomerase activity.

Select the correct ascending order of the levels of packaging of DNA?
1. Nucleosomes, 30 nm fibers, radial loop domains.
2. 30 nm fibers, nucleosomes, radial loop domains.
3. Nucleosomes, radial loop domains, 30 nm fibers.
4. Radial loop domains, nucleosomes, 30 nm fibers.

All the following statements regarding a nucleosome are incorrect except:
1. It contains a single large protein which is connected to DNA by smaller linker proteins.
2. It contains approximately 200 base pairs of DNA.
3. It includes histone and nonhistone proteins.
4. It is a 30 nm diameter structure.

Which one of the following statements about Histones is wrong?

The association of histone H1 with a nucleosome indicates:

1. DNA replication is occurring

2. The DNA is condensed into a chromatin fibre

3. The DNA double helix is exposed

4. Transcription is occurring