Quizzes Flashcards

1
Q

Which of the following is an example of one codon?
Which of the following is an example of one codon?
GCCATT
CATT
CAG
CCGUAA

A

CAG

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2
Q

Penetration requires that the entire virus is inserted within the host.
Penetration requires that the entire virus is inserted within the host.
True
False

A

False

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3
Q

The term “phage” is generally reserved for the viruses that infect
The term “phage” is generally reserved for the viruses that infect
plants.
bacteria.
multiple species.
animals.

A

bacteria

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4
Q

Herpesviruses can cause all of the following diseases in humans EXCEPT
Herpesviruses can cause all of the following diseases in humans EXCEPT
cold sores.
chicken pox.
spongiform encephalopathy.
cancer.

A

The correct answer is:

Spongiform encephalopathy

Rest all the infections can be caused by the Herpes virus.

Cold sores are caused by Human Herpes Virus 1(HHV 1).
Chicken pox is caused by Human Herpes virus 3 (HHV 3). also called Varicella zoster virus. Repited infection of this virus also causes skin infection called Shingles.
Cancer is caused by Human herpes Virus 9 (HHv 8) .
Spongiform encephalopathy is not a viral infection by Herpes virus. It is the contagious infection spreading through PRIONS. Missaphen prion proteins spread the infectitious disease.

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5
Q

The flow of biological information begins with
The flow of biological information begins with
mRNA translation.
transcriptional regulation.
RNA transcription.
DNA replication

A

A) DNA replication.

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6
Q

How is penetration different in animal viruses as compared to bacterial viruses?
How is penetration different in animal viruses as compared to bacterial viruses?
The viral genome penetrates an animal cell, while the entire viral particle penetrates a bacterial cell.
There is no difference; the entire viral particle penetrates both cell types.
The entire viral particle penetrates an animal cell, while only the viral genome penetrates a bacterial cell.
There is no difference; only the viral genome penetrates both cell types.

A

The entire viral particle penetrates an animal cell, while only the viral genome penetrates a bacterial cell

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7
Q

The process of synthesizing proteins involves translating one “language,” nucleic acid sequences, into another “language,” amino acid sequences. The cellular component that does the actual translating from codons to amino acids is the __________.
The process of synthesizing proteins involves translating one “language,” nucleic acid sequences, into another “language,” amino acid sequences. The cellular component that does the actual translating from codons to amino acids is the __________.
tRNA
RNA polymerase
rRNA
mRNA

A

tRNA

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8
Q

Influenza vaccines do NOT provide lifelong immunity on account of __________.
Influenza vaccines do NOT provide lifelong immunity on account of __________.
antigenic shift in the neuraminidase and hemagglutinin proteins
antigenic drift in the protein coat of the influenza virus
antigenic drift in the neuraminidase and hemagglutinin proteins
antigenic shift in the protein coat of the influenza virus

A

antigenic drift in the neuraminidase and hemagglutinin proteins

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9
Q
In all cells, genes are composed of
In all cells, genes are composed of
chaperones.
nucleic acids.
mRNA.
proteins.
A

nucleic acids.

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10
Q

A lytic infection results in death of the host cell.
A lytic infection results in death of the host cell.
True
False

A

T

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11
Q

Stop codons are also called ________ codons.
Stop codons are also called ________ codons.
conversion
release factor
nonsense
degeneracy

A

nonsense

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12
Q

What are the consequences of a viral infection of an animal cell?
What are the consequences of a viral infection of an animal cell?
Outcomes vary from rapid lysis to persistent infections, latent infections, or cancer.
lysis or lysogeny
lysogeny followed by eventual lysis
rapid lysis or latent infections

A

Outcomes vary from rapid lysis to persistent infections, latent infections, or cancer.

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13
Q

Why is a special polymerase, such as Taq polymerase, used for PCR?
Why is a special polymerase, such as Taq polymerase, used for PCR?
It is able to add DNA nucleotides without requiring an existing strand to add on to.
It has exceptionally good proofreading ability.
It works at relatively high temperatures.
It can add both DNA and RNA nucleotides

A

It works at relatively high temperatures.

Taq polymerase is obtained from thermophilic bacterium Thermus aquaticus. This bacterium inhabits in hot springs and able to withstand high temperatures.

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14
Q

The functional unit of genetic information is the
The functional unit of genetic information is the
nucleotide.
gene.
protein.
chromosome.

A

gene

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15
Q

Termination of RNA synthesis is ultimately determined by
Termination of RNA synthesis is ultimately determined by
terminases.
specific nucleotide sequences on the template strand.
exhaustion of RNA polymerase activity.
special protein factors.

A

specific nucleotide sequences on the template strand.

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16
Q

The consequence of an infection by a temperate bacteriophage is that the bacterial cell
The consequence of an infection by a temperate bacteriophage is that the bacterial cell
never lyses but continues to divide and replicate both the virus and the cell.
lyses before it gets a chance to divide.
may lyse before it divides or may continue to divide and replicate both the virus and the cell.
divides faster at moderate temperatures.

A

may lyse before it divides or may continue to divide and replicate both the virus and the cell.

17
Q
Indirect ELISA is used to detect
Indirect ELISA is used to detect
serum.
antigens.
viruses.
antibodies.
A

antibodies.

18
Q
Herpesviruses can cause \_\_\_\_\_\_\_\_\_\_.
Herpesviruses can cause \_\_\_\_\_\_\_\_\_\_.
shingles
cancer
cold sores or fever blisters
All of the listed responses are correct.
A

All of the listed responses are correct.

19
Q

A virus that kills its host is said to be
A virus that kills its host is said to be
lytic or virulent.
lysogenic.
temperate.
virulent or lysogenic, but not temperate.

A

lytic or virulent.

20
Q

When solutions of host cells and infectious virions are mixed and spread on an agar plate, ________ form where viruses lyse the host cells.
When solutions of host cells and infectious virions are mixed and spread on an agar plate, ________ form where viruses lyse the host cells.
plaques
prophages
insertion sequences
colonies

A

plaques