Molecular Basis of Inheritance Class 12 MCQs Questions with Answers

1. The mutations that involve addition, deletion or substitution of a single pair in a gene are referred to as

2. During DNA synthesis formed segment is:

3. The three codons which result in the termination of polypeptide chain synthesis are

4. Nitrogenous bases present in DNA:

5. Okazaki fregments is:

6. The strand of DNA that forms mRNA is called?

7. In DNA strand, the nucleotides are linked together by

8. The process of copying genetic information from one strand of DNA to RNA is termed as _________ .

9. In DNA helix:

10. Which of the following steps in transcription is catalysed by RNA polymerase ?

11. DNA double helix model was given by:

12. The sequence of structural genes in lac operon is

13. During transcription, the site of DNA molecule at which RNA polymerase binds is called

14. Which one is mainly transcribed:

15. DNA fragments are joined in a correct sequence by :

16. In some viruses, DNA is synthesised by using RNA as template. Such a DNA is called

17. In transcription in eukaryotes, heterogenous nuclear RNA (hnRNA) is tmascribed by

18. Histone proteins are

19. If a double stranded DNA has 20% of cytosine, what will be the percentage of adenine in it ?

20. The net electric charge on DNA and histone, is