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Which RNA polymerase is primarily responsible for transcribing protein-coding genes in eukaryotes?

• RNA polymerase I

• RNA polymerase II

• RNA polymerase III

• RNA polymerase IV

What is the function of histone acetyltransferase (HAT) during transcription regulation?

• It adds a methyl group to DNA, silencing the gene.

• It acetylates histones, loosening the nucleosome structure.

• It removes acetyl groups, tightening the nucleosome structure

• It recruits RNA polymerase to the promoter region

What is the sequence recognized by CPSF during transcription termination in eukaryotes?

• AAUAAA

• CG-rich sequence

• GU-rich sequence

• AUG

What is the primary function of the 5' cap added during RNA processing?

• To initiate translation directly

• To protect RNA from degradation by exonucleases

• To facilitate splicing of introns

• To signal the end of transcription

What is the role of the spliceosome in RNA processing?

• Adding a poly(A) tail to the mRNA

• Removing introns from pre-mRNA

• Editing the base sequence of RNA

• Degrading mRNA after translation

What is the consequence of RNA editing in mammalian apolipoprotein B mRNA?

• The gene is silenced by methylation

• A codon is changed to produce a different protein in the intestine

• Introns are removed to form mature mRNA

• The 5' cap is removed, leading to degradation

In eukaryotes, which factor assists in the translocation of tRNA & mRNA during translation?

• EF-G

• EF-Ts

• EF-Tu

• eIF2

Name a protein that assists in translation termination in both prokaryotes and eukaryotes

(a)