Question

1) The _________ is a site on a DNA strand where the two strands are separated in preparation for DNA replication.

a) origin of the replication b)replication fork c) Okazaki fragment d) RNA primer

2)An enzyme called ____ joins the 3' end of a dna fragment to the 5' end of another okazaki fragment during dna replication.

a) DNA polymerase III b) DNA ligase c) Topoisomerase d) None of these

3)In what direction can elongating dna strands grow (i.e in what direction are new DNA nucleotides added to a growing DNA strand)?

a)3' to 3' b)3' to 5' c)5' to 3' d) 5' to 5'

4)Which enzyme removes an RNA primer and replaces it was dna nucleotides?

a)DNA polymerase III b)Helicase c)Primase d) DNA polymerase I

5)If 30% of the DNA nucleotides in a particular eukaryotic cell are adenine, what percentage of the dna is made up of guanine?

A) 40% B)30% C)20% D)None of these

6)DNA that has been packages up with histones and other proteins in the nucleus of a eukaryotic cell is called__________.

a)chromosones b)chromarin c)sister chromatids d)nucleosomes

7)Which enzyme adds new nucleotides to a growing DNA strand during DNA replication?

a)DNA polymerase III b) Helicase c)Primase d) DNA polymerase I

8)Which of the following proteins binds to DNA strands that have been separated in preparation for DNA replication?

a)Primase b)single-strand binding protein c)Ligase d) DNA polymerase I

9)An enzyme called _______ separates a DNA strands about ot undergo replication, cuasing over winding strain. this stress is relieved by an enzyme called _________ that cuts overwound DNA , rotates it, and rejoins it ot the DNA strand.

a) DNA polymerase III; primase b)Helicase; DNA ligase c)Helicase; topoisomerase d)Topoisomerase; single-strand binding protein

10) Write out the complementary sequence to the parental DNA strand given below. Make sure to indicate directionality.

5'-ATCGCCTTACGAATG-3'