RQ: Unit 6 (part 1 & 2)

RNA differs from DNA in the following ways:

• it is a double-stranded molecule

• it is a single-stranded molecule

• it does not contain uracil

• it does not contain thymine

The backbone of DNA is made of

• sugar

• nitrogenous base

• phosphate group

• nucleotides

The two strands of DNA are going in opposite directions. That can be referred to as

• antiparallel

• parallel

• diverging

• converging

The amount of Cs found in a DNA molecule is 30%. How much As do you expect?

• 30%

• 60%

• 40%

• 20%

There are ____ main type of bases.

• 1

• 2

• 3

• 4

Why is DNA replication considered a universal mechanism?

• Because DNA is necessary

• Because cells need it

• Because it happens universally

• Because it occurs in most living organisms

DNA replication is said to be

• duplication

• semiconservative

• conservative

• demiconservative

DNA replication begins at sites called the _________of replication

• beginning

• origins

• sites

• point

____________________ is an enzyme that unwinds/unzips the double helix

• RNA polymerase

• DNA polymerase

• topoisomerase

• helicase

__________________________________ adds nucleotides to the growing strand of DNA.

• RNA polymerase

• DNA polymerase

• ligase

• helicase