Exam 8: Gene Expression: The Flow of Information From DNA to RNA to Protein

A typical example of a genetic system that employs RNA splicing is

In the digestive system, some protease enzymes must be secreted as an inactive form and then activated later by proteolytic cleavage once outside of the secreting cell.This is to prevent active proteases from damaging the secreting cells.What is the category of precursor proteins of this type?

Aminoacyl-tRNA synthetase is the enzyme that

A mutation that is characterized by a change in the DNA sequence, but no change in the resulting protein sequence, is called a

A mutation that changes a codon sequence, and subsequently changes the amino acid that should have been placed at that point in the polypeptide chain, is called a

Which of these terms is NOT used as a nickname for a stop codon?

Drugs like AZT, ddC, or ddI work against the AIDS virus because they

A tRNA molecule looks like a compact ____ when it is folded into its functional configuration.

Nonsense codons are

In the usual flow of genetic information (often called the Central Dogma), which of the following best represents the expression of genes?

The retroviruses, including HIV, are unique because they do reverse

Experiments that are done outside a living cell are describe by the Latin term

Experiments that are done inside a living cell are describe by the Latin term

The cellular organelle responsible for protein synthesis is the

In the modification of eukaryotic mRNA, a "cap" consisting of a/an _________ and a tail consisting of _______ are usually added to the transcript.

Ribosomes are composed of

Which of the following is required for initiation of eukaryotic translation?

A neomorphic mutation results in an allele that

RNA polymerase binds to a sequence called a/an ______________ before beginning transcription.

A codon is a three-base sequence of