Despite years of research, the actual structure 

of the DNA molecule is still unknown.

False

Bacteriophage is a type of virus

that infects bacteria

True

It has been discovered that proteins are the genetic material, rather than DNA, because proteins are more complex than DNA 

False

Chargaff observed that the amount of

adenine in an organism always equaled

the amount of thymine

True

DNA polymerases have the ability to check

for errors in nucleotide pairings

True

Even though Avery's experiments clearly

indicated that genetic material is

composed of DNA, most scientists at

that time continued to suspect that proteins 

were the genetic material

True

The strands of a DNA molecule are held together

by hydrogen bonding between adenine with guanine

molecules and cytosine with thymine molecules

False

The two areas on either end of the

bacterial DNA molecule where the double helix

separates are called replication forks.

True

The five-carbon sugar in DNA

nucleotides is called ribose

False

A nucleotide consists of a sugar, 

a phosphate group, and a nitrogen base

True

The amount of guanine in an organism

always equals the amount of

adenine

or

cytosine

Cytosine

Which of the following is NOT part

of a molecule of DNA

phosphate

or

ribose

Ribose

The entire molecule shown in the

diagram above is called a(n)

amino acid

or

nucleotide

Nucleotide

A vaccine is

a plasmid that contains disease-causing genes

or

a harmless version of a disease-causing microbe

a harmless version of a disease-causing microbe

The part of the molecule for which 

deoxyribonucleic acid is named is the 

sugar

or

nitrogen base

Sugar

Adenine : thymine

guanine : cytosine

or 

adenine : DNA

Guanine : Cytosine

The scientists credited with establishing the

structure of DNA are

Mendel and Griffith

or

Watson and Crick

Watson and Crick

The enzymes that unwind DNA are called

double helixes

or

DNA helicases

DNA helicases

Molecules of DNA are composed of long chains of

amino acids 

or

nucleotides

Nucleotides

A nucleotide consists of 

a sugar, a phosphate group, and a nitrogen base

or

a starch, a phosphate group, and a nitrogen base

a sugar, a phosphate group, and a nitrogen base

During DNA replication, a complementary strand of DNA

is made for each original DNA strand. Thus, if a portion of the original strand is CCTAGCT, the the new strand will be

CCTAGCT

or

GGATCGA

GGATCGA