Which of the following rRNAs acts as structural RNA as well as ribozyme in bacteria?

23 S rRNA

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5.8 S rRNA

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5 S rRNA

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18 S rRNA

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Solution

The correct option is A 23 S rRNA
Bacteria has 70S ribosome. The 30S sununit has 16S rRNA and 50S subunit has 23S and 5S rRNA. 23S rRNA has peptidyl transferase activity and catalyze the synthesis of peptide bond formation between amino acids in bacteria. This rRNA also serve as structural component for large subunit of bacterial ribosome.
Therefore, the correct answer is option A.

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Similar questions

Q. Which of the following subunit of ribosomes is composed of 23S rRNA and a 5S rRNA + 32 different proteins?

Q. Of the total RNA in cell, rRNA constitutes

Q. Which of the following statements are correct?
(i) RNA polymerase I transcribes rRNAs.
(ii) RNA polymerase II transcribes snRNAs.
(iii) RNA polymerase III transcribes hnRNA.
(iv) RNA polymerase II transcribes hnRNA.

Read the following statement and inferences, and select the correct option.

Statement: The core of the larger ribosomal subunit, where the transfer of the peptidyl bonds happen from one amino acid to the next, is made up entirely of rRNA

Inference:

A. rRNA is smaller than proteins and hence can fit in the smallest of crevices

B. rRNA has catalytic capability and hence confers the name ribozyme to ribosome

C. rRNA has higher binding affinity with each other and hence excludes proteins from its core structure

D. The proteins which make up ribosome do not have a significant role to play in its catalytic activity

Which of the inferences are true?

Q. Consider the following statements. In eukaryotes
I. RNA polymerase I transcribes rRNAs
II. RNA polymerase II transcribes snRNAs
III. RNA polymerase III transcribes hnRNA
IV. RNA polymerase II transcribes hnRNA
Which of the statements given above are correct?

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