Molecular Basis of Inheritance Class 12 MCQs Questions with Answers

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

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

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

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

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

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

7. During DNA synthesis formed segment is:

8. In DNA helix:

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

10. Histone proteins are

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

12. The sequence of structural genes in lac operon is

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

14. Nitrogenous bases present in DNA:

15. DNA double helix model was given by:

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

17. Which one is mainly transcribed:

18. Okazaki fregments is:

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

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