DNA Structure & Replication Quiz

What is the very first step that takes place during DNA replication?

• DNA polymerase adds on the nucleotides to the new strand

• Ligase "glues" the DNA

• Helicase unzips the DNA

• Exonuclease cuts out the RNA primers

The 3D structure of DNA is a __________ __________. It is formed of 2 strands twisted together.

• double helix
• alpha helix

• triple stranded

• single stranded

What does primase do?

• Cuts through hydrogen bonds to unzip the DNA

• Glues DNA fragments together

• Adds on RNA primers (starter flags)

• Builds and adds on the nucleotides

What does ligase do?

• Cuts through hydrogen bonds to unzip the DNA

• Glues DNA fragments together

• Adds on RNA primers (starter flags)

• Builds and adds on the nucleotides

DNA stands for __________?

• Ribonucleic acid

• Deoxyribonucleic acid

• Double Nitrogen acid

A nucleotide is made up of 3 parts; which part does NOT belong to the nucleotide?

• Sugar

• Phosphate

• Lipid

• Nitrogen Base

What kind of BOND is between two nitrogen bases?

• Covalent

• Ionic

• Sulfur

• Hydrogen

Name the nitrogenous bases found in DNA: A, T. G, C

• adenine, thymine, cytosine, guanine
• adenosine, thyme, cortisol, guanine

• apple, tangerine, guava, carrot

The nitrogen base A always bonds with ____.

• B

• T

• C

• G

Tags

NGSS.HS-LS1-1

The nitrogen base C always bonds with ____.

• B

• T

• O

• G

Tags

NGSS.HS-LS3-1