Biology MCQs

Page No. 76

In the lytic cycle of bacteriophage the host DNA is__________?


aReplicated

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bTurn off by the protein coat.

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cDigested into its nucleotides

✓


dTurned on by the removal of the protein coat

✖



Temperate phage may exist as_____________?


aProphage

✓


bCapsid

✖


cViron

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dRetrovirus

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View Answer Prophage

Which of the following is an RNA virus:


aInfluenza virus

✓


bHerpes virus

✖


cHBV

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dPox virus

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View Answer Influenza virus

In the Lysogenic cycle the DNA of the bacteriophage__________________?


aJoins the bacterial chromosomes

✓


bAttaches to the inner surface of the host membrane

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cIs immediately degraded when enters the host

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dGoes directly to host ribosomes for translation

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Tobacco mosaic virus is__________?


aSpherical

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bRod Shaped

✓


cTadpole like

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dHexagonal

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View Answer Rod Shaped

In life cycle of bacteriophage which step occur after attachment of prophage with the receptor site of the bacterial cell wall_____________?


aAbsorption

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bMultiplication

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cLysogeny

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dPenetration

✓


View Answer Penetration

Which of the following disease results in Paralysis due to viral attack on C.N.S:


aMeasles

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bHerpes simplex

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cHepatitis

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dPolio

✓


View Answer Polio

In lysogenic cycle the process of spearation of phage DNA from the hosts chromosome and initiation of lytic cycle is called______________?


aLysis

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bLysogeny

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cInduction

✓


dAdsorption

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View Answer Induction

An enzyme which can convert single stranded RNA into double stranded viral DNA is called____________?


aDNAase

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bRNAase

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cDNA polymerase

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dReverse Transcriptase

✓


View Answer Reverse Transcriptase

Which of the following is incorrect for the lysogenic cycle in life cycle of bacteriophage_____________?


aPhage when gets incorporated with the bacterial chromosome is called prophage

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bThe bacterium continues to live and reproduce normally

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cLysogenic bacteria may get infected by the related phage

✓


dThe cycle may convert into lytic type resulting from environmental exposure

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