AP Bio DNA & RNA Structure, & DNA Replication Review

AP Bio DNA & RNA Structure, & DNA Replication Review

Multiple Choice

DNA that is expressed is referred to as...

• euchromatin

• heterochromatin

Multiple Select

Which of the following includes the monomer that makes up DNA?

• phosphate-sugar-base

• nucleotide

Multiple Choice

The phosphodiester bonds in DNA are found

• between the 5' and 3' ends of the carbon on deoxyribose

• between the nitrogenous bases

DNA Structure

In an organic molecule, the carbon atoms are numbered. 

You can see the 3’ carbon and the 5’ carbon are on opposite sides.

DNA Structure

Ends of nucleotide strands are identified as 3’ and 5’—refers to C atom that bonds on phosphate (phosphodiester bond) Hydrogen bonds keep bases paired

Multiple Select

Which of the following accurately describes the base pairing rules?

• adenine-thymine

• purine-pyrmidine

• prymidine-prymidine

• adenine-guanine

• guanine-cytosine

DNA Replication

Multiple Choice

DNA is synthesized in the

• 3' to 5' direction

• 5' to 3' direction

Multiple Choice

DNA polymerase can only synthesize continuously

• from 3' to 5'

• from 5' to 3'

• it can synthesize continuously in both directions

Multiple Choice

Which enzyme unzips the double helix?

• helicase

• topoisomerase

• primase

• ligase

Multiple Choice

Which enzyme lays down RNA primer(s) for DNA polymerase to begin?

• helicase

• topoisomerase

• primase

• ligase

Multiple Choice

Which enzyme prevents nicks or supercoiling in the DNA during replication

• helicase

• topoisomerase

• primase

• ligase

Multiple Choice

Which enzyme joins the Okazaki fragments on the lagging strand?

• helicase

• topoisomerase

• primase

• ligase