Bacteriophages

 

 DOWNLOAD ALL  PDF E-BOOK's    >>>CLICK HERE<<<

Bacteriophages

Question 1
Which of the following is/are synthesized from late mRNA?
A
Phage structural proteins
B
Proteins that help with phage assembly without becoming part of the virion structure
C
Proteins involved in cell lysis and phage release
D
All of the above

Question 2
In viruses with envelopes
A
the envelope and the embedded proteins are encoded by the viral nucleic acid
B
the envelope is derived from the host but it contains embedded proteins coded by the viral nucleic acid
C
the envelope is coded by the viral nucleic acids, but the proteins come from the host's membrane proteins
D
the envelope and its imbedded proteins are derived from the host's membranes

Question 3
A bacterial defense mechanism against bacteriophage is called
A
concatamerization
B
polymerization
C
restriction
D
lysogeny

Question 4
The process by which phage reproduction is initiated in lysogenized culture is called
A
infection
B
integration
C
repression
D
induction

Question 5
The procapsid is assembled with the aid of ..... proteins.
A
ladder
B
framing
C
scaffolding
D
form

Question 6
One of the first enzymes synthesized by many bacteriophage is ....., an RNA-dependent RNA polymerase.
A
RNA transcriptase
B
RNA polymerase
C
RNA ligase
D
RNA replicase

Question 7
Which capsid symmetry is exhibited by most of the phages?
A
Helical
B
Icosahedral
C
Complex
D
None of these

Question 8
..... protein keeps the prophage dormant and prevents virus reproduction.
A
Operator
B
Promotor
C
Repressor
D
Enhancer

Question 9
Which of the following properties is due to lysogenic conversion by phages?
A
Toxin production in Corynebacterium diphtheriae
B
Toxin production in Clostridium botulinum types C and D
C
Antigenic variation in Salmonella anatum
D
All of the above

Question 10
Which of the following bacteria can be typed by phage typing method?
A
Staphylococcus aureus
B
Salmonella typhi
C
Vibrio cholerae
D
All of these
There are 10 questions to complete.

 

 DOWNLOAD ALL  PDF E-BOOK's    >>>CLICK HERE<<<