DNA Structure and Replication

Which of the following is not a DNA base?

• adenine (A)

• guanine (G)

• cytosine (C)

• histidine (H)

Nucleotides consist of all of the following except:

• a phosphate

• a sugar

• a base

• a nucleic acid

DNA is located in the _____ in eukaryotic cells.

• nucleus

• cytoplasm

• mitochondria

• ribosome

The enzyme that unzips DNA during replication is called:

• helicase

• zipase

• DNA polymerase

• ligase

At the end of replication, how many DNA molecules are there?

• 1

• 2

• 12

• 6

When DNA replication is complete, each DNA molecule consists of:

• one original strand and one new strand

• two new strands

• two original strands

• unzipped strands

What is the backbone of DNA made of?

• sugar and phosphate

• nitrogen bases

• sugar and nitrogen bases

• phosphate and nitrogen bases

The shape of DNA is arranged as:

• a double helix

• one strand of nucleotides

• squiggly lines

• a single nucleotide

Why does DNA replicate?

• It likes to have a friend around

• It needs to have multiple copies of DNA molecules in each cell

• It needs to make a copy before the cell divides so each cell has the complete DNA

• to make proteins

What are the complementary bases that would pair with this DNA strand: CTAATGT

• GATTACA

• AGCCGTG

• CTAATGT

• TCGGCAC