DNA replication

DNA synthesis and replication occurs within which phase of interphase?

• S phase

• G0 phase

• G2 phase

• G1 phase

Adenine pairs with Thymine; Cytosine pairs with Guanine. These are the four types of _______ found within DNA.

This enzyme unwinds and unzips the DNA molecule by breaking apart hydrogen bonds which holds the complementary nitrogenous bases together.

• primase

• DNA polymerase

• ligase

• helicase

DNA is made up of nucleotides. What are the nucleotides of DNA made up of?

• phosphate group

• nitrogenous base

• deoxyribose sugar

• ribose sugar

Topoisomerase helps DNA to supercoil.

• True

• False

The leading strand is termed ____; while the lagging strand is termed _____ and includes Okazaki fragments.

DNA is always synthesized in which direction?

• 5' to 3'

• 3' to 5'

Primase places primers so DNA polymerase can build new strands onto these primers.

• True

• False

What type of bond is formed between base pairs in order to hold the two DNA strands together which form a double helix?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Phosphodiester bond

The ligase enzyme seals gaps between DNA fragments and is similar to "molecular glue", binding different pieces of DNA together to form new sequences.

• True

• False