MCQ ON GENETIC CODE class 12 for NEET

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 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