A tRNA is charged with amino acid methionine :
(i) Name the process involved in the attachment
(ii) Point out the mRNA codon and anticodon on tRNA for this aminoacid
(iii) What is heterochromatin?

(a) Name the scientist who called tRNA an adapter molecule (b) Draw a clover leaf structure of t-RNA showing the following : (i) tyrosine attached to its amino acid site (ii) anticodon for this amino acid in its correct site (codon for tyrosine is UCA) (c) What does the actual structure of t-RNA look like.

Write the following about protein synthesis (i) Name the location where protein synthesis occurs. (ii) How do 64 codons code for only 20-alpha amino acids ? (iii) Which of the two bases of codon are most important for coding ?

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:

ltimg src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/SB_BIO_XII_SET_II_2008_E01_026_Q01.png" width="80%"gt Study the mRNA segment given above which is complete to be translated into a polypeptide chain. (i) Write the codons'a' and 'b' (ii) What so they code for ? (iii) How is peptide bond formed between two amino acids in the ribosome ?

A triplet base sequence in DNA reads ATT. What will be the corresponding mRNA codon, tRNA anticodon, and amino acid called by this DNA?

Which of the following statements are correct? I. Introns are present in mRNA and exons are present in tRNA II. Codons are present in mRNA and anticodons in tRNA III. Every intron is a set of three terminator codons IV. Exons are present in eukaryotes, while introns are present in prokaryotes