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Basis of Molecular Inheritance
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Basis of Molecular Inheritance
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25 Questions

1. The process of transfer of genetic information from DNA to RNA/formation of RNA from DNA is [1991]
2. Out of A-T - G-C pairing - bases of DNA may exist in alternate valency state owing to arrangement called [1994]
3. Nucleotide arrangement in DNA can be seen by [1993]
4. Different mutations referrable to the same locus of a chromosome give rise to [1997]
5. When a cluster of genes show linkage behaviour they [2003]
6. In which direction m-RNA synthesised on DNA template? [2001]
7. What does "lac" refer to in what we call the lac operon? [2003]
8. If a completely radioactive double stranded DNA molecule undergoes two rounds of replication in a non- radioactive medium - what will be the radioactive status of the four resulting molecules? [1997]
9. In a mutational event - when adenine is replaced by guanine - it is a case of [2004]
10. Telomerase is an enzyme which is a
11. In operon concept - regulator gene functions as [1999]
12. In eukaryotes - after transcription of mRNA - some of its nucleotides are removed before it is translated into polypeptide. The nucleotides which are removed from mRNA are called
13. DNA replication is [1989 - 2000]
14. DNA template sequence of CTGATAGC is transcribed over mRNA as [1994 - 95 - 2004]
15. Select the two correct statements out of the four (a-“d) given below about lac operon. (i) Glucose or galactose may bind with the repressor and inactivate it (ii) In the absence of lactose the repressor binds with the operator region (iii) The z-gene codes for permease (iv) This was elucidated by Francois Jacob and Jacque Monod The correct statements are: [2010]
16. Genetic map is one that [2003]
17. DNA elements which can switch their position are called [1998]
18. The transforming principle of Pneumococus as found out by Avery - MacLeod and McCarty was
19. Semi-conservative replication of DNA was first demonstrated in: [2009]
20. In the DNA molecule [2008]
21. The process of translation is [1993]
22. Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid? [2008
23. E.coli cells with a mutated z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because: [2005]
24. Molecular basis of organ differentiation depends on the modulation in transcription by [2007]
25. Which one of the following is not a part of a transcription unit in DNA? [2012]

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