Unit 6 Review: DNA and Gene Expression (HBio)

The monomers of DNA are called ____.

• Monosaccharides

• Fatty acids

• Amino acids

• Nucleotides

Nucleotides are composed of all of the following EXCEPT ___.

• Nitrogenous base

• Phosphate

• Amino acids

• Deoxyribose

Which of the following is NOT a base found in DNA?

• Adenine

• Cytosine

• Uracil

• Thymine

• Guanine

____ are nitrogenous bases that are composed of two rings of carbon and nitrogen.

• Purines

• Pyrimidines

Which bases are classified as pyrimidines?

• Adenine

• Cytosine

• Guanine

• Thymine

Pairs of ____ are located in the middle of a DNA molecule.

• Phosphates

• Sugars

• Nitrogenous bases

A(n) ____ is connected at the 3' carbon atom of the sugar in DNA.

• Hydroxyl group

• Nitrogenous base

• Phosphate group

In DNA, ____ pairs up with thymine.

• Adenine

• Cytosine

• Guanine

• Thymine

In DNA, guanine and cytosine are connected with ____ hydrogen bonds.

• 1

• 2

• 3

• 4

DNA replication is semiconservative because the daughter DNA molecules ____.

• Are either completely old or completely new

• Are made of 1 new strand of DNA and 1 old strand

• Are made of random pieces of new and old DNA