NEET · Biology · STD 12 - 9. biotechnology principlas and process

Which one of the following statement is not true regarding gel electrophoresis technique?

A The separated DNA fragments are stained by using ethidium bromide.
B The presence of chromogenic substrate gives blue coloured DNA bands on the gel.
C Bright orange coloured bands of DNA can be observed in the gel when exposed to \(UV\) light.
D The process of extraction of separated DNA strands from gel is called elution.

Verified Solution

Answer & Solution

Correct Answer

(B) The presence of chromogenic substrate gives blue coloured DNA bands on the gel.

Step-by-step Solution

Detailed explanation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match List \(I\) with List \(II\) :Choose the correct answer from the options given below :

List \(I\)	List \(I\)
\(A\) Exophthalmic goiter	\(I\) Excess secretion of cortisol, moon face hypergylcemia.
\(B\) Acromegaly	\(II\) Hypo-secretion of thyroid hormone and stunted growth.
\(C\) Cushing's syndrome	\(III\) Hyper secretion of thyroid hormone protruding eye balls.
\(D\) Cretinism	\(IV\) Excessive secretion of growth hormone.

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