Group members
Salman shah
Arshad khan
MCQS in Viral replication
1) The time during which no virus found inside the cell is called _______ .
A) Laten period
B) Cytopathic effect
C) Eclipse period
D) Early period
2) Toward the end of the Laten period the cell morphology altered the effect is known as _______.
A) Laten effect
B) Eclipse effect
C) Uncoating effect
D) Cytopathic effect
3) Hiv Virus attach to the _____ protein on helper T lymphocytes.
A) CD4
B) C3b
C) CD8
D) Nk cell
4) A Low PH within the vesicles favour ______.
A) Uncoating
B) Adsorption
C) Penetration
D) Transcription
5) Viruses with a double stranded DNA genome use host cell _____ enzyme to synthesize viral
mRNA .
A) DNA polymerase
B) Reverse Transcriptase
C) RNA polymerase
D) Endonuclease
6) All DNA Virus replicate in the nucleus except _____.
A) Pox Virus
B) Herpes virus
C) Adenovirus
D) Papovavirus
7) Virus cycle depends upon proteins______ to start replication or full replication cycle.
A) C-1 or cro gene
B) C-2 or cro gene
C) C-3 or cro gene
D) C-4 or cro gene
8) RNA segments that contain both positive polarity and negative polarity regions are called
_______.
A) Ambisense
B) Cap snatching
C) Prophage
D) Transduction
9) Synthesis of progeny virus DNA by herpes viruses involve a virus encoded enzyme called
________.
A) Transcriptase
B) Integrase
C) Terminase
D) Primase
10) _______ is the process by which viral DNA become integrated into host cell DNA .
A) Transduction
B) Lysogeny
C) Latency-associated Transcript
11) Which of the following is true about viruses?
a) They are cellular organisms.
b) They can reproduce independently.
c) They require a host cell to replicate.
d) They are larger than bacteria.
Answer: c) They require a host cell to replicate.
12) What is the outer protein coat of a virus called?
a) Capsid
b) Envelope
c) Nucleocapsid
d) Genome
Answer: a) Capsid
13) Which of these viruses is responsible for the common cold?
a) HIV
b) Influenza virus
c) Rhinovirus
d) Herpes virus
Answer: c) Rhinovirus
14) What is a retrovirus known for?
a) Causing plant diseases
b) Attacking the immune system
c) Reversing the flow of genetic information (RNA to DNA)
d) Being a double-stranded DNA virus
Answer: c) Reversing the flow of genetic information (RNA to DNA)
15).Which of the following is a method to prevent viral infections?
a) Antibiotics
b) Vaccination
c) Antiseptics
d) Probiotics
Answer: b) Vaccination
1. Which of the following is not followed by virus in killing infected cells.
.a Inhibit protein synthesis. b. Changes in RNA and DNA c. Enhance cellular respiration
d. All of them are correct
2. At which stage, there are no sign and symptoms in infected person.
a. Recovery b. Lantent c. Prodermal phase
d. Incubation
3. Which of the following is Vertical transmission?
a. Oral fecal. B. Droplets. C. Sexual. D. Brest feeding.
4. Which of the following is correct about carrier state ....
A. Shows symptoms b. Immune system shows response c. Mild disease d. Show no
symptoms but can infect others.
5.Which one is true regarding Vertical transmission
A. From mother to baby b. From father to son
C. From son to mother d. From husband to wife.
6. Which of the following is true regarding slow viral infections...
A. Have short incubation period
B. Are mild infection
C. Are sever infections
D. Have long incubation period.
