Gene Regulation and Chromatin Structure Quiz

How do eukaryotes primarily regulate gene expression?

• Through repressors

• Through activators

• Through silencers

• Through enhancers

What is the primary role of histones in chromatin?

• To degrade proteins

• To package and protect DNA

• To transcribe RNA

• To replicate DNA

What is the term used to describe the pattern of nucleosome and linker DNA?

• Beads on a string

• Solenoid model

• Chromatin loop

• Zigzag model

Which model is NOT associated with chromatin fiber packing?

• Zigzag model

• Solenoid model

• Beads on a string

• Helix model

What is the role of ATP-dependent chromatin remodeling complexes?

• To degrade RNA

• To slide histone cores and loosen DNA

• To modify histone tails

• To synthesize DNA

What is the function of histone chaperones?

• To bind RNA polymerase

• To assist in DNA replication

• To remove or exchange histones

• To degrade nucleotides

Which modification decreases the electrostatic attraction between DNA and histones?

• Phosphorylation

• Ubiquitination

• Methylation

• Acetylation

What is the role of a code reader complex in the histone code?

• To bind to specific histone modifications

• To synthesize proteins

• To replicate DNA

• To degrade histones

What is the primary function of writer proteins in the histone code?

• To read histone modifications

• To remove histones

• To degrade DNA

• To add covalent modifications to histones

Which of the following is NOT a covalent modification of histone tails?

• Acetylation

• Methylation

• Glycosylation

• Phosphorylation