1- Viruses are replicated in:
a) Living cells
b) Non-living cells
c) Both a and b
d) None
2- Viruses utilize the biosynthetic machinery of __ for the
synthesis of their own nucleic acids and protein:
a) Host
b) Own
c) Both a and b
d) None
3- Viruses are __ than bacteria:
a) Larger
b) Smaller
c) Slightly smaller
d) None
4- Viruses can pass through pores of filters from which
bacteria:
a) Can pass
b) Cannot pass
c) Some bacteria can pass, some cannot
d) None
5- Viruses can reproduce in:
a) Plant cells
b) Animal cells
c) Microorganisms
d) All of the above
6- Viruses are:
a) Ectoparasite
b) Accidental parasite
c) Obligate intracellular parasite
d) Facultative parasite
7- Which of the following statement about viruses is true:
a) Viruses lack metabolic machinery
b) They depend on the host cell to carry out many natal functions
c) Viruses may cause diseases during reproduction in host cells
d) All of the above
8- The viruses are composed of a central core of nucleic acid,
which is also known as:
a) Gene
b) Capsid
c) The genome
d) Coat
9- The central core in viruses is surrounded by a protein coat
called:
a) The genome
b) The capsid
c) The coat
d) Prions
10- 162 capsomeres are present in the capsid of:
a) Adenovirus
b) Poxvirus
c) Herpes virus
d) Parvoviruses
11- Non-enveloped virus is known as:
a) Naked virion
b) Virion
c) Enveloped virion
d) None
12- The single-stranded RNA tumor viruses are included in:
a) Parvoviruses
b) Retroviruses
c) Proviruses
d) Herpes viruses
13- The retroviruses have a special enzyme called:
a) Transcriptase
b) Reverse Transcriptase
c) Cellulase
d) Ligase
14- Reverse transcriptase can convert a single-stranded RNA
genome into:
a) Double-stranded viral DNA
b) Single-stranded viral DNA
c) Both a and b
d) None
15- The symptoms of AIDS are:
a) Sudden weight loss
b) Swollen lymph nodes
c) Loss of immune functions
d) All of the above
16- The major cell infected by HIV is the:
a) T-lymphocyte
b) Erythrocyte
c) Leucocyte
d) Platelets
17- HIV virus is a host:
a) Specific
b) Non-specific
c) Both and b
d) None
18- Which of the following statement about HIV is not true:
a) HIV can be transmitted by blood transfusion
b) Vaccines for HIV have been synthesized in South Africa
c) HIV is a host-specific
d) HIV can multiply in monkeys and cause diseases
19- AIDS does not transmit through:
a) Sweat, saliva, urine
b) Blood, sexual contact, breast milk
c) Mother to child during childbirth
d) Used syringes contaminated with HIV-infected blood
20- _______ is a course of HIV drugs taken daily by people most
at risk of HIV:
a) Pre-exposure prophylaxis
b) Post-exposure prophylaxis
c) BCG
d) Conjugate vaccine
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