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 (a)   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.

(a)  

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