How many DNA duplexes are obtained from one DNA duplex after 4 cycles of PCR?

• A) 8
• B) 4
• C) 32
• D) 16

TMV is ____ nm in size.

• A) 90
• B) 125
• C) 225
• D) 250

Which of the following is the parasite that is nonliving outside a living cell but becomes living on entering it.

• A) Plasmodium
• B) Bacteriophage
• C) Yeast
• D) Bacterium

Which one of the following viruses are initially identified on the basis of Haemadsorption?

• A) Parainfluenza
• B) Enterovirus
• C) HIV
• D) Picornavirus

The polymerase chain reaction is_________.

• A) DNA amplification technique
• B) DNA sequencing technique.
• C) DNA degradation technique
• D) All of the given options

Taq polymerase is preferably used in PCR because it is ____.

• A) Capable of proof reading
• B) Highly specific
• C) Very sensitive
• D) Heat stable

Which one of the following statements is most relevant with Collodion Filter

• A) Made up of porcelain
• B) Most useful in determining viral size
• C) Made up of Diatomaceous Earth
• D) Same as Seitz filter

HCV gets entry into the host cell by the process of _____.

• A) Endocytosis
• B) Fusion
• C) Genetic injection
• D) Viral Penetration

Picornavirus encodes _____ proteins.

• A) 3
• B) 8
• C) 5
• D) 10

Enveloped viruses enter the host cell preferably by the process of _____.

• A) Viral Attachment
• B) Endocytosis
• C) Fusion
• D) Viral Penetration

During _______, the viral capsid or genome is inserted into the cytoplasm of host cell.

• A) Endocytosis
• B) Viral Penetration
• C) Viral Attachment
• D) Hemi fusion State

Which one of the following steps of viral replication causes genome to be prepared to take over the host machinery?

• A) Fusion
• B) Viral penetration
• C) Uncoating
• D) Endocytosis

Which one of the following is false about FMDV?

• A) Enveloped virus enters into cell
• B) Enters cell via fusion process
• C) Enveloped virus
• D) Non- enveloped virus

Cellular surfaces have ______ charge.

• A) Neutral
• B) Negative
• C) Dual
• D) Positive

Cellular enzymes play role in _____.

• A) Uncoating
• B) Endocytosis
• C) Fusion
• D) Genetic injection

Host cell receptors have _____ arrangement complementary to virus.

• A) Electrostatic charge
• B) Positive charge
• C) Negative charge
• D) No charge

Which one of the following is true about mRNA?

• A) Double stranded
• B) Similar to positive strand
• C) Thymidine is replaced by guanine
• D) Uracil is replaced by adenine

Actinomysin inhibits the conversion of _____ to ____ .

• A) RNA; proteins
• B) DNA; proteins
• C) DNA; RNA
• D) RNA; DNA

During viral multiplication, endocytosis is followed by _____ .

• A) Acidification
• B) Uncoating
• C) Activation of immunity
• D) Membrane fusion

Virus surfaces are ____ .

• A) Amphoteric
• B) Negatively charged
• C) Positively charged
• D) Neutral