Which structure is formed by DNA wrapping around histone proteins?

• Chromosome

• Nucleosome

• Ribosome

• Polymerase

How many times does DNA wrap around a histone octamer?

• Once

• Twice

• Three times

• Four times

Which histones are part of the core histone octamer?

• H1, H3, H4, H5

• H2B, H3, H4, H5

• H2A, H2B, H3, H4

• H1, H2B, H3, H4

What charge do histone proteins have?

• Neutral

• Negative

• Positive

• Variable

What type of charge does DNA carry?

• Positive

• Neutral

• Negative

• Mixed

What is the 30 nm fiber an example of?

• RNA structure

• Protein folding

• Chromatin condensation

• Cell wall development

What term describes DNA regions that are loosely packed and accessible for transcription?

• Euchromatin

• Heterochromatin

• Nucleosome

• Centromere

What type of chromatin is highly condensed and transcriptionally inactive?

• Euchromatin

• Heterochromatin

• Telomeres

• Exons

What does “epi-” in epigenetics mean?

• Within

• Above

• Beneath

• Inside

Which enzyme is involved in transcription and must access promoter regions?

• DNA ligase

• Helicase

• RNA polymerase II

• DNA polymerase