Chapter 12 & 13 Test

A sugar, phosphate group, and a nitrogenous base all make up a(n)...

• Nucleotide

• Amino Acid

• Lipid

This molecule is an example of a(n)...

• Lipid

• Amino Acid

• Nucleotide

Select the two pieces that all nucleotides have in common.

• 5-Carbon Sugar

• Thymine

• Phosphate group

• Uracil

What are the four nitrogenous bases found in DNA?

• A, U, C, G

• A, T, C, G

• A, B, C, D

In DNA, Guanine always pairs with...

• Adenine

• Thymine

• Cytosine

In DNA, Adenine always pairs with...

• Thymine

• Uracil

• Cytosine

The first step of DNA Replication is...

• the DNA unwinds

• the DNA unzips

• Free nucleotides are paired with the existing DNA strand

The second step of DNA Replication is...

• the DNA unwinds

• the DNA unzips

• Free nucleotides are paired with the existing DNA strand

The third step of DNA Replication is...

• the DNA unwinds

• the DNA unzips

• Free nucleotides are paired with the existing DNA strand

The enzyme that joins free nucleotides to the existing DNA strand and proofreads its work is called...

• Primase

• Helicase

• DNA Polymerase