Regarding Assertion and Reason- select the right option Assertion -A- CaCl 2 is necessary to create heat-shock competent cells- Reason -R- CaCl 2 imparts a positive charge to the cell-A- -A- is true and -R- is false-B- -A- is false and -R- is true-C- Both -A- and -R- are true and -R- is a correct explanation to -A-D- -Both -A- and -R- are true but -R- is not a correct explanation to -A-

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Standard X

Biology

Nerve Impulse Conduction

Regarding Ass...

Question

Regarding Assertion and Reason, select the right option
Assertion [A]: $C a C l_{2}$ is necessary to create heat-shock competent cells.
Reason [R]: $C a C l_{2}$ imparts a positive charge to the cell.

[A] is true and [R] is false.

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[A] is false and [R] is true .

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Both [A] and [R] are true and [R] is a correct explanation to [A].

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[Both [A] and [R] are true but [R] is not a correct explanation to [A].

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Solution

The correct option is C Both [A] and [R] are true and [R] is a correct explanation to [A].
The cell membrane has a negative charge. This is not conducive for the transformation process. $C a C l_{2}$ gives the cell an overall positive charge. This helps the cell to accept the negatively charged DNA.

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Similar questions

Q. Regarding Assertion and Reason, select the right option
Assertion [A]:

C a C l_{2}

is necessary to create heat-shock competent cells.
Reason [R]:

C a C l_{2}

imparts a positive charge to the cell.

Q. Regarding the assertion and reason, choose the correct option.
Assertion [A]: Deforestation is one main factor contributing to global warming.
Reason [R]: Besides CO₂, methane and CFCs are also greenhouse gases.

(a) Both Assertion (A) and Reason (R) are true and Reason (A) and Reason (R). For selecting the correct answer, use the following code :

(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).

(d) Assertion (A) is false and Reason (R) is true.

$\begin{matrix} Assertion (A) & Reason (R) \sqrt{3} i s a n i r r a t i o n a l n u m b e r . & T h e s u m o f a r a t i o n a l n u m b e r a n d a n i r r a t i o n a l n u m b e r i s a n i r r a t i o n a l n u m b e r . \end{matrix} The correct answer is: (a)/(b)/(c)/(d).$

This question consists of two statements, namely, Assertion (A) and Reason (R). For selecting the correct answer, use the following code:

(a) Both Assertion (A) and Reason (R) are true and Reason (R) correct explanation of Assertion (A).

(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).

(d) Assertion (A) is false and Reason (R) is true.

Q. Assertion(A): The sky appear dark instead of blue to an astronaut.

Reason(R) : Scattering of sunlight cannot happen due absence of atmosphere in outer space.

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Regarding Assertion and Reason, select the right option Assertion [A]: CaCl2 is necessary to create heat-shock competent cells. Reason [R]: CaCl2 imparts a positive charge to the cell.

The correct option is C Both [A] and [R] are true and [R] is a correct explanation to [A].The cell membrane has a negative charge. This is not conducive for the transformation process. CaCl2 gives the cell an overall positive charge. This helps the cell to accept the negatively charged DNA.

Regarding Assertion and Reason, select the right option
Assertion [A]: $C a C l_{2}$ is necessary to create heat-shock competent cells.
Reason [R]: $C a C l_{2}$ imparts a positive charge to the cell.