Question

Study the mRNA Segment given above which is complete to be translated into a polypeptide chain.
  1. Write the codons ‘a’ and ‘b.'
  2. What do they code for?
  3. How is peptide bond formed between two amino acids in the ribosome?

Answer

  1.  
a - AUG.

b - UAA/UAG/UGA.
  1.  
AUG code for Methionine.

UAA/UAG/UGA - Stop codon/Nonsense codon/Does not code for any amino acid.
  1.  
Charged tRNA are brought closer together on mRNA in the ribosomes, and Ribosomes acts as a catalyst (ribozyme) forming peptide bond.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

How are assisted reproductive technologies helpful to humans? How are ZIFT and GIFT different from intra uterine transfers? Explain.
Expand the following:
  1. ART
  2. GIFT
  3. ICSI
  4. RTI
  5. IUI
Snapdragon shows incomplete dominance for flower colour. Work out across and explain the phenomenon. How is this inheritance different from Mendelian pattern of inheritance? Explain.
OR
In snapdragon (Antirrhinum majus), a plant with red flowers was crossed with a plant with white flowers. Work out all the possible genotypes and phenotypes of $F_1$ and $F_2$ generations. Comment on the pattern of inheritance in this case.
STDs are a threat to reproductive health. Describe any two such diseases and suggest preventive measures.
Describe any three steps taken up by our Governmentto check population growth rate.
What do you understand by climax community?
  1. Expand BOD.
  2. At a particular segment of a river near a sugar factory, the BOD is much higher than the normal level. What is it indicative of? What will happen to the living organisms in this part of the river?
Many secondary metabolites of plants have medicinal properties. It is their misuse that creates problems. Justify the statement with an example.
  1. Explain adaptive radiation with the help of a suitable example.
  2. Cite an example where more than one adaptive radiation have occurred in an isolated geographical area. Name the type of evolution your example depicts and state why it is so named.
In eukaryotes, explain splicing & tailing (figure is not necessary).