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Ribosome Structure

The primary j...

Question

The primary job of rRNA in the smaller subunit of ribosome is to

A

Provide some part of the genetic information

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B

Facilitate the binding of tRNA to the ribosome

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C

Facilitate the binding of mRNA to the ribosome

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D

Facilitate the transfer of peptidyl bonds between amino acids

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Solution

The correct option is C Facilitate the binding of mRNA to the ribosome
rRNA does not have a role in providing any genetic information during protein synthesis; in the smaller ribosomal subunit, rRNA has certain specialised sites which facilitate the binding of mRNA to the ribosome to initiate the process of translation.

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Q. The primary job of rRNA in the smaller subunit of ribosome is to

Q. Match the following.
(a) tRNA 1. Linking of amino acids
(b) mRNA 2. Transfer of genetic information
(c) rRNA 3. Nucleolar organising region
(d) Peptidyl transferase 4. Transfer of amino acid from cytoplasm of ribosome

Q. Match the following columns.

\begin{matrix} C o l u m n I & C o l u m n I I A . t R N A & 1. L i n k i n g o f a m i n o a c i d s B . m R N A & 2. T r a n s f e r o f g e n e t i c i n f o r m a t i o n C . r R N A & 3. N u c l e o l a r o r g a n i s i n g r e g i o n D . P e p t i d y l & 4. T r a n s f e r o f a m i n o a c i d f r o m t r a n s f e r a s e & c y t o p l a s m t o r i b o s o m e \end{matrix}

Q. Select an option that shows the correct sequence of the events involved in the translation mechanism.
a. Binding of mRNA to a smaller subunit of ribosome
b. Aminoacylation of tRNA
c. Binding of initiator tRNA to the P-site of the ribosome
d. Formation of polypeptide
e. Formation of a peptide bond between first and second amino acids at the A site

Q. A smaller subunit of ribosome has a binding site for ______ and the larger subunit has two binding sites for tRNA molecules.

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