Gene Expression Quick Review

RNA is synthesized on a DNA template in a process called _____, which utilizes the enzyme _____

• translation; RNA polymerase

• transcription; DNA polymerase

• transcription; RNA polymerase

• replication; DNA polymerase

Which of the following is NOT a necessary component of translation?

• codon

• mRNA

• ligase

• polymerase

Given the following DNA strand, which of the following is its complementary mRNA?

G G A C T G A T T

• C C T G A C T A A

• C C U G A C U A A

• G G A C T G A T T

• T T A G T C A G G

Amino acids are joined together into a protein chain by which of the following?

• transfer RNA

• DNA polymerase

• hydrogen bonds

• messenger RNA

Proteins contain _____ different amino acids, whereas DNA and RNA are composed of _____ different nucleotides

• 20, 64

• 3, 20

• 4, 20

• 20, 4

The base pair rules states that:

• Replication is semiconservative

• DNA is a double helix held together by hydrogen bonds

• A pairs with G, T pairs with C

• A pairs with T, G pairs with C

Once transcription has been completed, which of the following is NOT necessary for protein synthesis to occur?

• tRNA

• ribosomes

• mRNA

• DNA

Which part of the tRNA molecule binds to the mRNA molecule?

• anticodon loop

• acceptor stem

• amino acid

• 5 prime end

Okazaki fragments occur on the _____ and are bonded together by _____

• leading strand, polymerase

• mRNA, anticodons

• lagging strand, ligase

• tRNA, polymerase

How many different codons are possible?

• 3

• 20

• 64

• infinite