Ligase plays a major role in ____________ .


a. replication of lagging strands
b. mRNA processing in eukaryotes
c. polypeptide synthesis by ribosomes
d. RNA transcription

Select the false statement:

a. DNA is made of deoxyribonucleotides.

b. RNA is made of ribonucleotides.

c. RNA is built in a 5' to 3' direction.

d. DNA is built in a 5' to 3' direction.

e. RNA primase builds RNA in transcription.

Match the following: <IMAGE>

Which of the following molecules functions as a “proofreader” for a newly replicated strand of DNA?

a. DNA polymerase III

b. primase

c. helicase

d. ligase

The addition of to a cytosine nucleotide after DNA replication is called                                  .

a. methylation

b. restriction

c. transcription

d. transversion

On the accompanying figure, label DNA polymerase I, DNA polymerase III, helicase, lagging strand, leading strand, ligase, nucleotide (triphosphate), Okazaki fragment, primase, replication fork, RNA primer, and stabilizing proteins.

<IMAGE>

During DNA replication, the enzyme ___________, catalyzes the elongation of new DNA by adding, to the 3' end of the previous nucleotide, new nucleotides that are complementary to a DNA template.

Which of the following enzymes breaks the hydrogen bonds between the DNA strands?

Which of the following enzyme-function matches is incorrect?