Exam II

All of the following are part of the nucleosome, except...

• H2A

• H3

• H2B

• H1

Euchromatin is...

• Condensed and inaccessible

• Condensed and accessible

• Decondensed and inaccessible

• Decondensed and accessible

Which is the third order of chromatin structure?

(a)  

This type of chromatin can interconvert from euchromatin to heterochromatin and vice versa

• Facultative heterochromatin

• Constant heterochromatin

• Constant euchromatin

• Chromatin fiber

What is absolutely necessary for transcription to occur (without it, transcription would never occur)?

(a)  

Where do we find the TATA box?

• Cis-acting sequence

• Enhancer

• Silencer

• Promoter

• All are correct

What protein binds to the enhancer resulting in an optimal level of transcription?

• Silencer

• Activator

• Repressor

• Importin

Repressors prevent the formation of what?

• Promoter

• Enhanceosome

• Spliceosome

• Ribosome

Gene methylation leads to the activation of a gene.

• True

• False

This enzyme adds acetyl groups to histone tails to make DNA accessible

• HDACs

• Kinase

• HATs

• RATs