Class 12 Biology MCQ Chapter 6 Molecular Basis of Inheritances Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Biology MCQ Chapter 6 Molecular Basis of Inheritances Question Answer in English and select need one. AHSEC Class 12 Biology Objective Type Question Answer As Per AHSEC New Book Syllabus Download PDF. AHSEC Biology MCQ Class 12 Solutions.
Class 12 Biology MCQ Chapter 6 Molecular Basis of Inheritances
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Biology Multiple Choice Solutions in English Medium are part of All Subject Solutions. Here we have given AHSEC Class 12 Biology MCQ Question Answer English Medium for All Chapters, You can practice these here.
Molecular Basis of Inheritances
Chapter: 6
| MCQs |
Choose the Correct Option:
1. Who proposed the double helix model of DNA?
(i) Hershey and Chase.
(ii) Watson and Crick.
(iii) Avery and MacLeod.
(iv) Meselson and Stahl.
Ans: (ii) Watson and Crick.
2. What is the repeating unit of nucleic acid?
(i) Nucleotide.
(ii) Nucleoside.
(iii) Amino acid.
(iv) Ribosome.
Ans: (i) Nucleotide.
3. Which bond holds the nitrogenous bases together in DNA?
(i) Covalent bond.
(ii) Hydrogen bond.
(iii) Ionic bond.
(iv) Disulfide bond.
Ans: (ii) Hydrogen bond.
4. In DNA, adenine always pairs with:
(i) Cytosine.
(ii) Guanine.
(iii) Uracil.
(iv) Thymine.
Ans: (iv) Thymine.
5. Which base is found only in RNA?
(i) Thymine.
(ii) Cytosine.
(iii) Uracil.
(iv) Adenine.
Ans: (iii) Uracil.
6. The process of copying genetic information from DNA to RNA is called:
(i) Translation.
(ii) Replication.
(iii) Mutation.
(iv) Transcription.
Ans: (iv) Transcription.
7. Which enzyme is responsible for synthesizing RNA?
(i) DNA polymerase.
(ii) RNA polymerase.
(iii) Ligase.
(iv) Helicase.
Ans: (ii) RNA polymerase.
8. Which of the following is a stop codon?
(i) AUG.
(ii) UAA.
(iii) GGA.
(iv) AAA.
Ans: (ii) UAA.
9. In which phase of the cell cycle does DNA replication occur?
(i) G1 phase.
(ii) S phase.
(iii) G2 phase.
(iv) M phase.
Ans: (ii) S phase.
10. Who discovered transformation in bacteria?
(i) Watson.
(ii) Griffith.
(iii) Franklin.
(iv) Crick.
Ans: (ii) Griffith.
11. The structural unit of a nucleosome is:
(i) DNA loop.
(ii) Histone octamer.
(iii) Chromosome.
(iv) Ribosome.
Ans: (ii) Histone octamer.
12. Which of the following is not involved in DNA replication?
(i) DNA polymerase.
(ii) Helicase.
(iii) RNA polymerase.
(iv) Ligase.
Ans: (iii) RNA polymerase.
13. Which RNA brings amino acids to the ribosome?
(i) mRNA.
(ii) tRNA.
(iii) rRNA.
(iv) snRNA.
Ans: (ii) tRNA.
14. What type of inheritance does DNA follow?
(i) Dispersive.
(ii) Conservative.
(iii) Semi-conservative.
(iv) Non-conservative.
Ans: (iii) Semi-conservative.
15. Which of these is a purine base?
(i) Cytosine.
(ii) Thymine.
(iii) Adenine.
(iv) Uracil.
Ans: (iii) Adenine.
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