1. Which of the following is true of
viruses?
a)multiply
only in the host cells
b)are made
up of proteins only
c)behave as
if they are plants
d)occur only
inside bacteria
2. Viruses are essentially made up of
a)proteins
and lipids
b)starch and
carbohydrates
c)proteins
and nucleic acid
d)starch,
proteins and carbohydrates
3.Viral genes are made of
a)RNA only
b)DNA only
c)either DNA
or RNA
d)either
proteins or nucleic acids
4. Mark the statement that is correct
for viruses only:
a)they are
intracellular facultative parasites
b)they
reproduce and mutate
c)their
genetic material is DNA
d)they lack
functional anatomy
5. TMV was first isolated in
crystalline form by:
a)Mayer
b)Luria
c)Miller
d)Stanley
6. A virus that can reproduce without
killing its host is called a:
a)Lytic
virus
b)virion
c)Temperate
virus
d)Retroactive
virus
7.The fact
that best supports the concept that viruses are living is that viruses?
a)are made
of common chemicals
b)causes
diseases
c)duplicate
themselves
d)penetrate
cell membranes
8. A virion
is
a)a
infectious nucleic acid
b) an
infectious virus particle
c)a virus
parasite on algae
d)a virus
parasite on bacteria
9. A viriod
is a:
a)virus
which infects blue green algae
b)naked
infectious nucleic acid
c)virus with
nucleic acid and protein shell
d)virus
which infects bacteria
10. Prions are
a) organism containing only nucleic acid (DNA or RNA)
b) protein which are capable of replication within certain mammalian cells
c) small cells which are infectious
d)fungal toxins
Answers:
1.a)multiply only in the host cells
2. c)proteins and nucleic acid
3. c)either DNA or RNA
4. b)they reproduce and mutate
5. d)Stanley
6. c)Temperate virus
7. b)causes diseases
8. b) an infectious virus particle
9. b)naked infectious nucleic acid
10. b) protein which are capable of replication within certain mammalian cells