Download App

Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance5 Marks
Question
There is only one possible sequence of amino acids when deduced from a given nucleotide. But multiple nucleotide sequences can be deduced from a single amino acid sequence. Explain this phenomenon.
✓

Answer

Some amino acids are coded by more than one codon (known as degeneracy of codon), hence on deducing a nucleotide sequence from an amino acid sequence, multiple nucleotide sequences will be obtained.
For example: isoleucine has three codons AUU, AUC and AUA. Hence a dipeptide Met-Ile can have any of the following nucleotide sequences:
  1. AUG - AUU
  2. AUG - AUC
  3. AUG - AUA
If we deduce amino acid sequences of the above nucleotide sequences, all the three will code for Met-Ile.

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

Explore more

More "Answer the following questions in detail." from Molecular Basis of Inheritance→Molecular Basis of Inheritance — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Observe the graph and explain Alexander von Humboldt’s views about species richness and area relationship.Image
→
You have studied the story of Pepper moths in England. Had the industries been removed, what impact could it have on the moth population? Discuss.
→
Since October 02, 2014 "Swachh Bharat Abhiyan" has been launched in our country.
  1. Write your views on this initiative giving justification.
  2. As a biologist name two problems that you may face while implementing the programme in your locality.
  3. Suggest two remedial methods to overcome these problems.
→
Explain about the factors that affect water absorption.
→
Explain the structure of cyton.
→
Distinguish between the following:
Gene flow and Genetic drift.
→
Name the hormones secreted by the adrenal cortex and state their role.
→
Heart is called a pump.
→
On world population day, Rohit and his friends arranged an awareness campaign on population explosion programme in their locality. Some elderly people tried to stop the children and asked them not to talk on such things in public. The children convinced the elders about the need for the programme and on understanding their point of view, the elders also joined the campaign.
  1. Why is such awareness programme necessary?
  2. What role has the government played in controlling population explosion?
  3. When were reproductive health programmes initiated in India?
  4. What values did Rohit and his friends show on the occasion?
→
Ganga has recently been declared the national river. Discuss the implication with respect to pollution of this river.
→