MCQ ON GENETIC CODE class 12 for NEET | THE GENETIC CODE class 12 | MCQ GENETIC CODE with Answer | Check the below NCERT MCQ question for class 12 Biology chapter 06 based on the with Answers.

MCQ ON GENETIC CODE class 12 for NEET
MCQ ON GENETIC CODE class 12 for NEETMCQ on GENETIC CODE class 12 Biology with answers were prepared based on the latest pattern. We have provided class 12 Biology MCQs questions on GENETIC CODE with Answers to help students understand the concept very well.
MCQ ON GENETIC CODE is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24
Introduction:
Genetic code is the relationship of an amino acid sequence in a polypeptide and nucleotide base sequence in master RNA or antisense stand of DNA. Gamow first suggested that sequence of three nucleotides called codons codes for a specific amino acid . Genetic code is triplet in nature,it is commaless,it is nonambigous. The first codon starting a polypeptide is methionine.
MCQ ON GENETIC CODE class 12 for NEET
1. Which amino acid is determined by 4 Genetic code
(a) leucine
(b) serine
(c) proline
(d) tyrosine
Ans (c) proline
2. Some amino acids are coded by more than one codon as the code is
(a) unambiguous
(b) specific
(c) universal
(d) degenerate
Ans. (d) degenerate
3. Which codon does not have tRNA .
(a) start codon
(b) stop codon
(c) AUG
(d) GGG
Ans. (b) stop codon
4. Number of codons coding GGG is
(a) 6
(b) 4
(c) 2
(d) 1
Ans.(d) 1
5. The first codon starting a polypeptides is
(a) AUG
(b) CUG
(c) AGG
(d) CGA
Ans.(a) AUG
6. Stop signal are
(a) ochre
(b) amber
(c) opal
(d) all the above
Ans.(d) all the above
7. Termination codons are
(a) UAA -ochre
(b) UAG -amber
(c) UGA-opal
(d) all the above
Ans.(d) all the above
8.Wobble hypothesis was proposed by
(a) Crick
(b) Watson
(c) Mendel
(d) Morgan
Ans.(a) Crick
9. Genetic code is
(a) triplet, universal, ambiguous and degenerate.
(b) triplet , universal , nonambigous, and nondegenerate
(c) triplet, universal, nonambigous and degenerate
(d) triplet, universal, ambiguous and non degenerate
Ans. (c) triplet, universal, nonambigous and degenerate
10. Out of 64 codons, 61 code for 20 types of amino acid ,its due to
(a) overlapping genes
(b) degeneracy of genetic code
(c) wobbling of codons
(d) universality of codons
Ans. (b) degeneracy of genetic code
11. The exons part of mRNA has code for
(a) polypeptide
(b) carbohydrates
(c) lipid
(d) phospholipid
Ans.(a) polypeptide
12.The exons segments are reunited after splicing by
(a)RNA primase
(b) RNA protease
(c) RNA polymerase
(d) RNA ligase
Ans . (d) RNA ligase
13. Sequence of three bases of DNA constitutes
(a)Genome
(b) gene pool
(c) genetic code
(d) genetic drift
Ans.(c) genetic code
15. Teminism is
(a) reverse transcription
(b) DNA polymerase
(c) DNA gyrase
(d) Helicase
Ans. (a) Reverse transcription
16. Codes for mRNA and protein are
(a) zigzag
(b) coplanar
(c) colinear
(d) none of the above
Ans.(c) colinear
17. DNA molecules has small units called
(a) purine
(b) pyrimidine
(c) cistron, muton, recon
(d) receptor
Ans.(c) cistron,muton , recon
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18. In genetic code dictionary , codons used to code for all 20 essential amino acids are
(a) 20
(b) 61
(c) 64
(d) 60
And.(b) 61
19. Anticodon is base triplet for
(a) mRNA complementary to rRNA
(b) mRNA complementary to tRNA
(c) tRNA complementary to mRNA
(d) none of the above
Ans. (c) tRNA complementary to mRNA
20. Number of stop punctuation code is
(a) 3
(b) 1
(c) 2
(d) 4
Ans.(a) 3
21.Genetic code is degenerate because
(a) codons have same energy level
(b) each codon has a different meanings
(c) each codon has many meaning
(d) many codon has same meaning
Ans. (d) many codon has same meaning
22. Who discovered genetic code
(a) Khorana
(b) nirenberg
(c) Ochoa
(d)crick
Ans.(b) Nirenberg
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