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Translation and Translocation

Ribosome atta...

Question

Ribosome attaches to the start codon.

A

False

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B

True

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Q. Ribosomes are attached to ER through?

Q. Movement of ribosome from one codon to the other is called .

Q. Arrange the order of events of initiation of translation. I. AUG or GUG comes to lie over P-site to produce 40S-mRNA complex.
II. P-site attracts tRNA which lies opposite to initiation codon to form 40S-mRNA-tRNA^met.
III.Union of the two subunits of ribosomes occurs, A site becomes operational and second codon of mRNA lies over it.
IV. mRNA attaches itself to smaller subunit of ribosome with its cap coming in contact with 3’ end of 18 S rRNA.
V. The larger subunit of ribosome now attaches to 40S-mRNA-tRNA^metcomplex to form 80S mRNA-tRNA complex.
a. I, II, III, IV, V
b.II, V, III, IV, I
c. III, IV, V, I, II
d. IV,I,II,V,III

Q. what is the difference in function of cytoplasmic ribosome and ribosome attached to RER?

Q. Given below are the steps of protein synthesis. Arrange them in. correct sequence and select the correct option.
(j) Codon-anticodon reaction between mRNA and aminoacyl tRNA complex.
(ii) Attachment of mRNA and smaller sub-unit of ribosome.
(iii) Charging or aminoacylation of tRNA.
(iv) Attachment of larger sub unit of ribosome to the mRNA-tRNAMet complex.
(v) Linking of adjacent amino acids.
(vi) Formation of polypeptide chain.

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