NEET · Biology · STD 12 - 5. molecular basis of inheritance

Select the correct option.Direction of Direction of reading of \(RNA\) synthesis the template \(DNA\) strand

Direction of \(RNA\) synthesis Direction of reading of the template \(DNA\)

\((a)\) \(5'-3'\) \(3'-5'\)

\((b)\) \(3'-5'\) \(5'-3'\)

\((c)\) \(5'-3'\) \(5'-3'\)

\((d)\) \(3'-5'\) \(3'-5'\)

A \((a)\)
B \((b)\)
C \((c)\)
D \((d)\)

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Answer & Solution

Correct Answer

(A) \((a)\)

Step-by-step Solution

Detailed explanation

(a) : RNA polymerase initiates and extends the \(RNA\) (chain elongation) and functions always in \(5'\) to \(3'\) direction. The structural component of \(DNA\) has \(3'\) to \(5'\) polarity. It is also called template \(DNA\) strand or antisense \((-)\) strand.

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 \(II\)
\(A.\) Down's syndrome	\(I.\) \(11^{th}\) chromosome
\(B.\) \(\alpha -\)Thalassemia	\(II.\) \(X\) chromosome
\(C.\) \(\beta -\)Thalassemia	\(III.\) \(21^{st}\) chromosome
\(D.\) Klinefelter's syndrome	\(IV.\) \(16^{th}\) chromosome

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Match List I with List II :

List I (Respiratory Volume)	List II (Capacity in mL)
A. ERV (Expiratory Reserve Volume)	I. \(2500-3000 mL\)
B. RV (Residual Volume)	II. 500 mL
C. IRV (Inspiratory Reserve Volume)	III. \(1000-1100 mL\)
D. TV (Tidal Volume)	IV. \(1100-1200 mL\)

Choose the correct answer from the options given below :

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Direction of \(RNA\) synthesis	Direction of reading of the template \(DNA\)
\((a)\) \(5'-3'\)	\(3'-5'\)
\((b)\) \(3'-5'\)	\(5'-3'\)
\((c)\) \(5'-3'\)	\(5'-3'\)
\((d)\) \(3'-5'\)	\(3'-5'\)

Select the correct option.Direction of Direction of reading of \(RNA\) synthesis the template \(DNA\) strand Direction of \(RNA\) synthesis Direction of reading of the template \(DNA\) \((a)\) \(5'-3'\) \(3'-5'\) \((b)\) \(3'-5'\) \(5'-3'\) \((c)\) \(5'-3'\) \(5'-3'\) \((d)\) \(3'-5'\) \(3'-5'\)

Step-by-step Solution