超星 - Unit Test 7

单选题

Introduction of DNA molecules into the recipient organism is termed as ____________

A.transformation
B.translation
C.transduction
D.transcription

单选题

Chemical transformation refers to the methods which use chemicals in order to carry out transformation. Which of the following statements is true with respect to it? ____________

A.Chemical transformation decreases the efficiency of transformation as compared to natural transformation
B.Ice cold calcium solution followed by heat shock is responsible for affecting the efficiency of DNA uptake
C.The mechanism responsible for it named as ‘the heat shock model’
D.Other complex mixtures such as those containing Manganese and hexamine cobalt can’t be used to affect the efficiency

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单选题

Electroporation is also used for taking up the DNA by the cells. It constitutes of ____________

A.inserting the DNA into the cells via an electric shock
B.increased efficiency than both natural and chemical methods
C.causing the least amount of damage in comparison to other methods
D.decreased efficiency than both natural and chemical methods

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单选题

Viral infection can also be used to take up the DNA by the cells. ____________

A.True
B.False

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