Molecular Basis of Inheritance Class 12 MCQs Questions with Answers

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

2. Histone proteins are

3. Okazaki fregments is:

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

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

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

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

8. Which one is mainly transcribed:

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

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

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

12. During DNA synthesis formed segment is:

13. The sequence of structural genes in lac operon is

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

15. In DNA helix:

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

17. Nitrogenous bases present in DNA:

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

19. DNA double helix model was given by:

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