Which of the Following Is a Technique Used to Encourage

question 55

Multiple Choice

Which of the following is a technique used to encourage bacteria to take up DNA from the surrounding culture medium?

• A)pretreatment of bacteria with a brief heat shock, followed by exposure to Ca²⁺ ions
• B)pretreatment of bacteria with Cu²⁺ ions, followed by a brief heat shock
• C)pretreatment of bacteria with Ca²⁺ ions, followed by a brief heat shock
• D)pretreatment of bacteria with Ca²⁺ ions, followed by a brief cold shock
• E)pretreatment of bacteria with a brief heat shock, followed by exposure to Mg²⁺ ions

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Definitions:

Geometric Sequence

A series of numbers in which each subsequent number is obtained by multiplying the preceding number by a constant, non-zero value known as the common ratio.

Geometric Sequence

An array of numbers wherein each element, after the first, is calculated by multiplying the previous element by a stable, non-zero quantity referred to as the common ratio.

First Five Terms

Denotes the initial five elements or numbers in a sequence or series.

Geometric Sequence

A succession of numbers where, from the second element onwards, each number is derived by multiplying its precursor by a steady, non-zero coefficient known as the common ratio.