Molecular Basis of Inheritance Class 12 MCQs Questions with Answers

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

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

3. Histone proteins are

4. Okazaki fregments is:

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

6. DNA double helix model was given by:

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

8. In DNA helix:

9. Nitrogenous bases present in DNA:

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

11. Which one is mainly transcribed:

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

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

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

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

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

17. During DNA synthesis formed segment is:

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

19. The sequence of structural genes in lac operon is

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