Download Biology Ch 24 Pract Test

CHAPTER 24 Viruses
Practice Test
Most scientists believe that viruses first appeared
on Earth ____ living cells appeared.
a.
at the exact time when
b.
immediately before
c.
a very long time before
d.
after
d
Animal viruses often infect only specific host cells
because
a.
the host cell must have specific receptors for
proteins on the virus surface.
b.
viruses have receptors for host cell
glycoproteins.
c.
the virus must have the same DNA as the
host cell.
d.
the enzymes of the virus can attach only to
specific host cells.
a
Unlike viruses, prions
a.
are composed only of protein.
b.
can be treated with antibiotics.
c.
are capable of reproducing outside of a host
cell.
d.
can cause brain infections.
a
Which of the following is not linked to cancer?
a.
Epstein-Barr virus
c.
Ebola virus
b.
human papillomavirusd.
hepatitis B virus
c
Viruses are classified according to
a.
the shape of their genome.
b.
whether they have a membrane envelope.
c.
whether they contain RNA or DNA.
d.
All of the above
d
A typical virus consists of
a.
a protein coat and a cytoplasm core.
b.
a polysaccharide coat and a nucleic acid
core.
c.
a carbohydrate coat and a nucleic acid core.
d.
a protein coat and a nucleic acid core.
d
Biologists now know that viruses
a.
are the smallest organisms.
b.
all form the same crystalline shape.
c.
consist of a protein surrounded by a nucleic
acid coat.
d.
contain RNA or DNA in a protein or lipidprotein coat.
d
Refer to the illustration above. Which structure is
found outside the cell after the cell is infected?
a.
structure 3
c.
structure 1
b.
structure 4
d.
structure 2
c
Refer to the illustration above.
Which structure could possibly be made of RNA?
a.
structure 2
c.
structure 4
b.
structure 3
d.
structure 5
b
All viruses have
a.
mitochondria.
b.
cytoplasm.d.
d
c.
ribosomes.
None of the above
The
a.
b.
c.
d.
capsid of a virus is the
nucleus.
cell wall and membrane complex.
cell membrane.
protective outer coat.
d
HIV causes AIDS by
a.
gradually destroying a person’s immune
system.
b.
destroying the covering of a person’s nerves.
c.
converting a proto-oncogene to an oncogene.
d.
damaging a person’s blood vessels.
a
The
a.
b.
c.
d.
study
they
they
they
they
of viruses is a part of biology because
are living organisms.
belong to the kingdom Eubacteria.
are active inside living cells.
are about to become extinct.
c
Viruses
a.
have nuclei and organelles.
b.
are cellular organisms.
c.
are surrounded by a polysaccharide coat.
d.
reproduce only in living cells.
d
Which of the following contains only RNA?
a.
a prion
c.
a viroid
b.
a virus
d.
All of the above
c
Scientists first began to study viruses because
they
a.
formed crystals.
b.
were seen through a microscope.
c.
were made of cells.
d.
could not be seen but caused disease.
d
Antibiotics are ineffective against viral infections
because
a.
viruses have enzymes that inactivate the
antibiotics.
b.
host cells protect the viruses.
c.
antibiotics interfere with cellular processes
that viruses do not perform.
d.
viral protein coats block the antibiotics from
entering the virus.
c
Which of the following is not a viral disease of
humans?
a.
hepatitis
b.
shingles
c.
SARS
d.
All of the above are viral diseases of humans.
d
Viruses are considered nonliving because
a.
they cannot carry out metabolism by
themselves.
b.
they are not made up of cells.
c.
they cannot reproduce by themselves.
d.
All of the above
d
Tobacco mosaic virus
a.
causes disease in tobacco plants.
b.
is able to be crystallized.
c.
is smaller than a bacterium.
d.
All of the above
d
Viruses that use reverse transcriptase to cause
their host cells to transcribe DNA from an RNA
template are called
a.
antibodies.
c.
retroviruses.
b.
bacteriophages. d.
capsoviruses.
c
Viruses can vary in size and ____________________.
shape
An enzyme called _________________________
manufactures DNA that is complementary to a
virus’s RNA.
reverse transcriptase
The protein coat of a virus is called a(n)
____________________.
capsid
The virus that causes AIDS is called
_________________________.
HIV (human
immunodeficiency virus)
The Ebola virus, the SARS virus, and hantavirus are
examples of ____________________ viruses.
emerging
The End