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NEET UG BIOLOGY MCQ: BIOTECHNOLOGY-PRINCIPLES AND PROCESSES
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Assertion: A bacterial cell with no restriction enzymes will be easily infected and lysed by bacteriophages.
Reason: Restriciton enymes catalyse synthesis of protective coat around bacterial cell that prevents bacteriophage attack.
Reason: Restriciton enymes catalyse synthesis of protective coat around bacterial cell that prevents bacteriophage attack.
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Correct option: D
If both Assertion and Reason are false
Option D (If both Assertion and Reason are false) is correct because bacteria without restriction enzymes are indeed more susceptible to bacteriophages, and restriction enzymes cleave phage DNA, not synthesize a protective coat.
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Assertion: Special methods are used for
transformation i.e., incorporation of recombinant
DNA into molecule.
Reason: DNA is a hydrophilic molecule. Proteins are removed by treatment with Enzyme isolated from Thermus aquaticus bacterium is used in plasmids used in genetic engineering is obtained from Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain? Which one of the following is used as vector for cloning genes into higher organisms?
transformation i.e., incorporation of recombinant
DNA into molecule.
Reason: DNA is a hydrophilic molecule. Proteins are removed by treatment with Enzyme isolated from Thermus aquaticus bacterium is used in plasmids used in genetic engineering is obtained from Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain? Which one of the following is used as vector for cloning genes into higher organisms?