Question

1. The ribosome is important for catalyzing the formation of peptide bonds. Which of the following statements is true?

(a) The number of rRNA molecules that make up a ribosome greatly exceeds the number of protein molecules found in the ribosome.

(b) The large subunit of the ribosome is important for binding to the mRNA.

(c) The catalytic site for peptide bond formation is formed primarily from an rRNA.

(d) Once the large and small subunits of the ribosome assemble, they will not separate from each other until degraded by the proteasome.

2.How are most eukaryotic transcription regulators able to affect transcription when their binding sites are far from the promoter?

(a) by binding to their binding site and sliding to the site of RNA polymerase assembly

(b) by looping out the intervening DNA between their binding site and the promoter

(c) by unwinding the DNA between their binding site and the promoter

(d) by attracting RNA polymerase and modifying it before it can bind to the promoter

Answer 1

1. For this question, the correct option will be option C, i.e., The catalytic site for peptide bond formation is formed primarily from an rRNA.

2. The right answer is option B, i.e., by looping out the intervening DNA between their binding site and the promoter. It is through this mechanism most eukaryotic transcription regulators able to affect transcription when their binding sites are far from the promoter