Chapter 9:
Chemistry of the Gene
Practice Test
1.
About how many paired nitrogen bases can be found in the simplest known virus?
a.
6.6 billion
b.
5000
c.
100,000
d.
500
Hint
2.
Genes contain information for making all kinds of _______ .
a.
proteins
b.
lipids
c.
acids
d.
carbohydrates
Hint
3.
What material did O.T. Avery demonstrate was the transforming principle in bacterial cells?
a.
a protein
b.
a clone
c.
a blueprint
d.
DNA
Hint
4.
What is a set of three bases in a row that act as a code for a particular amino acid?
a.
helix
b.
polypeptide
c.
codon
d.
nucleotide
Hint
5.
What is one sequence of nucleotides along a DNA molecule?
a.
a clone
b.
a blueprint
c.
a protein
d.
a gene
Hint
6.
A single unit of DNA that consists of a sugar, a phosphate group, and a nitrogen base is a _____________ .
a.
nucleotide
b.
nucleolus
c.
codon
d.
nucleus
Hint
7.
Use the
table
to answer this question. What amino acid does the codon AAA code for?
a.
serine
b.
leucine
c.
phenylalanine
d.
cysteine
Hint
8.
In the DNA molecule, the nitrogen base guanine can only bond with what other nitrogen base?
a.
cytosine
b.
purine
c.
adenine
d.
thymine
Hint
9.
How many double-stranded DNA molecules are formed when DNA replication is complete?
a.
two
b.
four
c.
one
d.
three
Hint
10.
What is a virus that attacks bacteria?
a.
helix
b.
guanine
c.
bacteriophage
d.
codon
Hint
