Chapter 9:
Expressing Genetic Information
Practice Test
1.
Which of these is NOT a reason that viruses are a serious threat to cellular life?
a.
Viruses have their own metabolism that is not understood.
b.
Viruses replicate quickly.
c.
Viruses evolve rapidly.
d.
Viruses can remain hidden inside host cells.
Hint
2.
What is a nonliving particle of nucleic acid, protein, and sometimes a membrane, that can replicate only inside a living cell?
a.
virus
b.
bacterium
c.
eukaryote
d.
prokaryote
Hint
3.
What is a chemical signal given off by cells in one part of an organism that regulate the behavior of cells in another part of the organism?
a.
structural protein
b.
hormone
c.
catalyst
d.
enzyme
Hint
4.
What substance joins RNA nucleotides according to the base sequence in DNA?
a.
trypsin
b.
DNA polymerase
c.
RNA polymerase
d.
pepsin
Hint
5.
In what type of viral infection is the viral DNA replicated by the host cell's enzymes and cells burst to release new virus particles?
a.
lytic infections
b.
long-term infections
c.
lysogenic infections
d.
endemic infections
Hint
6.
Where in the cell does ribosomal RNA synthesis occur?
a.
at the nucleolus in the nucleus
b.
at ribosomes on the endoplasmic reticulum
c.
at the ribosomes in the cytoplasm
d.
on the origin point on the cell membrane
Hint
7.
Proteins that will become part of membranes or leave the cell are made on ribosomes that ________________ .
a.
are bound to Golgi bodies
b.
are found in the cytoplasm
c.
are bound to the endoplasmic reticulum
d.
are attached to the nuclear membrane
Hint
8.
Which of these is NOT one of the stages in transcription?
a.
termination
b.
promotion
c.
elongation
d.
initiation
Hint
9.
Ribosomes are made out of proteins and ______________ .
a.
transfer RNA
b.
ribosomal RNA
c.
messenger RNA
d.
DNA
Hint
10.
What is the part of a protein sequence that directs the cell to transport a certain protein to the correct location?
a.
the exon
b.
the intron
c.
the signal sequence
d.
the frame shift
Hint
