BIOLOGICAL CLASSIFICATION
KINGDOM MONERA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are smaller then viruses
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They cause infections
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Their RNA is of high molecular weight
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They lack a protein coat
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Detailed explanation-1: -The correct option is D i.e. their RNA is of high molecular weight.
Detailed explanation-2: -Presently known viroids consist solely of a low molecular weight RNA of about 75, 000–130, 000.
Detailed explanation-3: -Viroids are pathogens that are smaller than viruses. It is a free RNA with a low molecular weight. It lacked the protein coat which is present in viruses and hence was termed viroid.
Detailed explanation-4: –Viroids contain nucleic acid but do not code for protein; they use the RNA polymerase II enzyme from the host cell for their replication. So, the wrong statement is ‘Viroids were discovered by D.J. Iwanowski’.
Detailed explanation-5: -Correct option: 3 Infective constituent in viruses is the protein coat. Explanation: Infective constituent in viruses is either DNA or RNA not protein.