Exam 16: Transcription, RNA Processing, and Translation

There are 61 codons that each specify the addition of a specific amino acid,and three stop codons for which there is no corresponding amino acid.However,there are only about 40 tRNA molecules,representing 40 anticodons.How is that possible?

The start codon is the same for prokaryotes and eukaryotes.What is the start codon?

Figure 16.3 -Refer to Figure 16.3.What is the function of the AGU on the loop of the tRNA?

How are RNA hairpin turns related to termination?

How does termination of translation take place?

What is inosine,and what role does it play in translation?

Eukaryotes have three nuclear RNA polymerases.The primary function of RNA polymerase II is

α-amanitin is a toxin produced by the death cap mushroom.It blocks the synthesis of mRNA.What effect would it have on health of the organism that ate death cap mushrooms?

During elongation,RNA polymerase has three prominent channels,or grooves.These channels provide sites for all of the following,EXCEPT

What is the function of the 3′ end of the tRNA?

The TATA box of the eukaryotic promoter is analogous to which structure of the prokaryotic promoter?

A primary transcript in the nucleus of a eukaryotic cell is ________ the functional mRNA,while a primary transcript in a prokaryotic cell is ________ the functional mRNA.

The ribosome-binding site of prokaryotes is also known as

A mutation that results in premature termination of translation

Which of the following is NOT one of the steps in initiation of translation?

Which molecule or reaction supplies the energy for polymerization of nucleotides in the process of transcription?

Figure 16.2 -Refer to Figure 16.2.The mRNA is smaller than the length of the DNA that codes for it because

What molecule/feature ensures that the correct amino acid is added with reading of a specific codon during translation?

Ribosomes can attach to prokaryotic messenger RNA

Post-translational modifications include all of the following EXCEPT