12.3 DNA Replication

Question 0

special sites where replication
begins.

Answer 0

Replication origins

Question 1

the process in which DNA copies itself (duplicates).

Answer 1

Replication of DNA

Question 2

The combination of DNA and proteins is called a

Answer 2

Replisome

Question 3

enzyme that begins the replication process by attaching to a DNA molecule and breaking the hydrogen bonds between the nitrogen bases. DNA helicase moves along the molecule and “unzips” the two strands of DNA.

Answer 3

DNA Helicase

Question 4

enzyme that catalyzes the formation of the sugar-to-phosphate bonds that connect one nucleotide to the next one.

Answer 4

DNA Polymerase

Question 5

covalently joins the Okazaki fragments on the lagging strand.

Answer 5

DNA Ligase

Question 6

is the enzyme that adds a short stretch of RNA (about 5 nucleotides long) that acts as an RNA primer.

Answer 6

Primase

Question 7

help keep the DNA strands separated.

Answer 7

Single-stranded binding proteins

Question 8

Any change in the sequence of a cell’s DNA is
known as a

Answer 8

Mutation