Exam 12: Genes Structure, Replication, and Expression

Hershey and Chase demonstrated that when the bacteriophage T2 infected its host cell, the __________ is injected into the host but the __________ remained outside.

The expressed regions of split genes are called

Prokaryotic DNA replication occurs at a rate of

The portion of the tRNA molecule that binds to the codon on the mRNA is called the

The stop codons are translated codons; that is, they specify amino acids to be inserted into the last position of a growing polypeptide chain.

The process by which the base sequence of an RNA molecule is used to direct the synthesis of a protein is called

In eukaryotes a series of __________ residues are added to the 3' end of an RNA molecule as part of the posttranscriptional processing used to produce functional mRNA.

Over twisting or under twisting of helical DNA generates

The Y-shaped part of the DNA molecule where the actual replication process occurs is called the replication __________.

Aminoacyl-tRNA synthetases catalyze covalent addition of __________ __________ to tRNAs.

The chromosomes of most bacteria are comprised of

Which of the following is the initiator codon?

Which of the following is not a termination codon?

Bacterial chromosomes, unlike eukaryotic chromosomes, often consist of a single replicon.

Which of the following nitrogenous bases is usually found in RNA but not in DNA?

A consensus sequence in the untranslated leader sequence of a prokaryotic mRNA which serves as a ribosome binding site is called the _____ - _____ sequence.

As prokaryotes normally only have one set of genes, they are called __________.

________ molecules deliver amino acids to ribosomes during translation.

The region at which the RNA polymerase binds is the __________ region.

Which of the following is not considered the final product of the expression of a gene?