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 The following features occur during protein synthesis:

(a) Movement of mRNA from the nucleus into the cytoplasm, where it binds to the ribosomes

(b) Formation of tRNA-amino acid complex

(c) Transcription of specific segments of DNA into mRNA molecules in the nucleus

(d) Binding of N-terminal amino acid, methionine tRNA to the "P' site of the ribosome. The tRNA anticodon pairs with AUG on mRNA'

(e) Formation of peptide bond between first and second amino acids at the A site

(f) Release of the complete polypeptide chain from mRNA and the ribosomes

(g) Migration of dipeptide to form a tripeptide and then a polypeptide

The correct order of events is:

 

Option: 1

c,b,a,e,f and g

 


Option: 2

a,b,c,d,e,f and g


Option: 3

c, a, b, e, d, f and g


Option: 4

c, a, b, d, e, g and f


Answers (1)

The following features occur during protein synthesis:

  1. Transcription of specific segments of DNA into mRNA molecules in the nucleus.
  2. Movement of mRNA from the nucleus into the cytoplasm, where it binds to the ribosomes.
  3. Formation of tRNA-amino acid complex.
  4. Binding of N-terminal amino acid, methionine tRNA to the "P' site of the ribosome. The tRNA anticodon pairs with AUG on mRNA'.
  5. Formation of peptide bond between first and second amino acids at the A site.
  6. Migration of dipeptide to form a tripeptide and then a polypeptide.
  7. Release of the complete polypeptide chain from mRNA and the ribosomes.

Hence, the correct answer is option 4.

Posted by

Ramraj Saini

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