NEET-UG Biology · Class 12
Reading the genetic code — NEET & JEE Questions
Reading the genetic code is a topic in Molecular Basis of Inheritance, a Class 12 Biology chapter of the NEET-UG syllabus. TestBudy holds 14 published NEET-UG questions on Reading the genetic code, each with the marking scheme of the real paper. The ideas it examines include Degenerate but unambiguous codons, Which codons start and stop translation.
- questions
- 14
- shown here
- 10
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Key formulas and concepts
The ideas Reading the genetic code is examined on, as they are tagged in the syllabus tree.
- Degenerate but unambiguous codons
- Which codons start and stop translation
Reading the genetic code MCQs with solutions
10 of the 14 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
A property in which more than one codon can specify the same amino acid:
- A. polarity
- B. overlap
- C. ambiguity
- D. degeneracy
The usual initiation codon in translation:
- A. AUG
- B. UAG
- C. UGA
- D. UAA
Who proposed that the genetic code for amino acids should be made up of three nucleotides?
- A. Jacque Monod
- B. Franklin Stahl
- C. George Gamow
- D. Francis Crick
Of the 64 codons of the genetic code, three do not code for any amino acid and act as stop signals. They are
- A. AUG, UAA, UAG
- B. UGA, AUG, GUG
- C. UAA, UAG, UGA
- D. UAA, UGG, UAG
The codon AUG has a dual function in the genetic code. It
- A. codes for valine and acts as a stop codon
- B. acts as both start and stop codon
- C. codes for tryptophan and initiates transcription
- D. codes for methionine and also acts as the initiation codon
The sixth mutant codon of beta globin gene causing polymerization of Haemoglobin and change in RBC shape is
- A. GUG
- B. AUG
- C. GAG
- D. CAG
The salient features of genetic code are : (A) The code is palindromic (B) UGA act as initiator codon (C) The code is unambiguous and specific (D) The code is nearly universal Choose the most appropriate answer from the options given below :
- A. (A) and (D) only
- B. (B) and (C) only
- C. (A) and (B) only
- D. (C) and (D) only
Which one of the following is the sequence on corresponding coding strand, if the sequence on mRNA formed is as follows 5âAUCGAUCGAUCGAUCGAUCGAUCG AUCG 3â?
- A. 3â UAGCUAGCUAGCUAGCUAGCUAGCUAGC 5â
- B. 5â ATCGATCGATCGATCGATCGATCGATCG 3â
- C. 3â ATCGATCGATCGATCGATCGATCGATCG 5â
- D. 5â UAGCUAGCUAGCUAGCUAGCUAGCUAGC 3â
Statement I : The codon 'AUG' codes for methionine and phenylalanine. Statement II : 'AAA' and 'AAG' both codons code for the amino acid lysine. In the light of the above statements, choose the correct answer from the options given below.
- A. Statement I is incorrect but Statement II is true
- B. Both Statement I and Statement II are true
- C. Both Statement I and Statement II are false
- D. Statement I is correct but Statement II is false
Why is the genetic code described as degenerate?
- A. Codons overlap extensively
- B. One codon always specifies several amino acids
- C. Several codons can specify one amino acid
- D. Different species use entirely unrelated codon meanings
Common mistakes in Reading the genetic code
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Argues that degeneracy means point mutations never change the protein.
- Thinks degeneracy or overlap protects against frameshifts.
- Reassigns the cell-free system and the defined-sequence RNA synthesis to the wrong people.
- Treats a rare exception as a refutation of the rule.
Practise this chapter
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