NEET · Biology · STD 11 - 2. Biology classification

Which of the following statements is wrong for viroids?

A They cause infections.
B Their \(RNA\) is of high molecular weight.
C They lack a protein coat.
D They are smaller than viruses.

Verified Solution

Answer & Solution

Correct Answer

(B) Their \(RNA\) is of high molecular weight.

Step-by-step Solution

Detailed explanation

(b) : \(RNA\) of viroid has low molecular weight.

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 \(II\)

List \(I\)	List \(II\)
\(A.\) Common cold	\(I.\) Plasmodium
\(B.\) Haemozoin	\(II.\) Typhoid
\(C.\) Widal test	\(III.\) Rhinoviruses
\(D.\) Allergy	\(IV.\) Dust mites

:Choose the correct answer from the options given below :

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From NEET

Match List \(- I\) with List \(- II.\)

List \(- I\)	List \(- II\)
(a) \(S\) phase	(i) Proteins are synthesized
(b) \(G_2\) phase	(ii) Inactive phase
(c) Quiescent stage	(iii) Interval between mitosis and initiation of \(DNA\) replication
(d) \(\mathrm{G}_{1}\) phase	(iv) \(DNA\) replication

Choose the correct answer from the options given below.\((a) -(b) -(c)- (d)\)

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