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Class 12 Biology Chapter 6 Molecular Basis Of Inheritance Quiz 9 (60 MCQs)

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1. A DNA nucleotide may be made up of a phosphate group, along with .....
2. The enzyme, which helps to cut one strand of DNA duplex to release tension of coiling of two strands is:
3. A sequence of three RNA base can function as-********A. Codon********B. Gene********C. Anticodon********D. Nucleosides
4. If E. coli was allowed to grow for 120 minutes then what would be the proportions of light and hybrid densities DNA molecule?
5. Which of the following statements describes the process of transformation in bacteria?
6. RNA editing occurs in
7. DNA fingerprinting procedures use ..... to cut a DNA sample into segments.
8. Name the RNA molecules which is used to carry genetic information copied from DNA?
9. Coupled transcription and translation found in
10. RNA act as genetic material in
11. Which scientist determined that guanine pairs with cytosine?
12. Translation happens in the-
13. The process of creating a protein from RNA is called
14. Characteristic(s) of most DNA is / are ..... A. A pairs with T by 2 hydrogen bonds ..... B. Antipolarity of complementary chains ..... C. 20 $A^0$
15. HnRNA is found only in prokaryotes.
16. If you were to observe the activity of methylated DNA, you would expect it to
17. The amino acid attaches to the tRNA at its
18. The polarity with 5'-3' has the sequence similar strand
19. The fact that a purine base always paired through hydrogen bonds with a pyrimidine base leads to, in the DNA double helix
20. In post transcription stage, which among the following process is not involved.
21. Who proposed semi conservative mode of replication in DNA through Experimental study in E.coli?
22. Correct sequence for Alanine code:
23. The experimental proof for semiconservative replication of DNA was first shown in a-
24. DNA as an acidic substance present in nucleus was first identified by whom in 1869Hint:He named it Nuclein
25. Transition type of mutation is caused when-
26. HGP methology which includes identification of all the genes that express as RNA is referred as
27. The structure of DNA includes its double helix and nucleotide components.
28. Which of the following statements concerning the regulator gene (R) associated with the lac operon is correct?
29. What bonds are present in DNA
30. Which one of the following condition can cause pneumonia in mice?
31. Central dogma of protein synthesis is
32. Which molecule has its synthesis directly controlled by DNA?
33. Regulatory genes
34. Which scientist(s) mixed a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form?
35. Antiparallel strands of a DNA molecule means that:
36. Beside protein enzymes certain biochemical reactions are catalysed by
37. Enzyme that connects the DNA to the backbone (glues)
38. DNA profiling is also known as DNA .....
39. Transcription unit:
40. In his work with pneumonia-causing bacteria and mice, Griffith found that .....
41. The human genome project started in ..... and completed, in ..... year respectively.
42. DNA sequences that code for protein are known as
43. If the sequence of initrogen bases of the coding strand of DNA in a transcription unit is:5'-ATGAATG-3', the sequence of bases in its RNA transcript would be
44. Because most of the amino acids are represented by ore than one codon the genetic code is-
45. Frederick Sanger is credited for the invention of
46. In DNA, 10% of nitrogen bases are guanine.Then find out the percentage of Adenine.
47. Which scientist proposed the Central Dogma of molecular biology?
48. On reaching the terminator region of transcription unit
49. In prokaryotic DNA replication, the lagging strand is synthesized:
50. Functional unit of a gene is
51. During infection of E. coli cells by bacteriophage T$_{2}$
52. Transcription starts non-specifically in the absence of
53. The genetic code is said to be degenerate because:
54. Identify the mismatch pair.
55. How many pairs of nucleotides are present in one turn of DNA helix?
56. The elongation of the leading strand during DNA synthesis
57. Semi-discontinuous synthesis occurs in
58. For the translation to be initiated which of the following does not occur? a
59. Methyl guanosine triphosphate is added to the 5' end of hnRNA in a process of:
60. How many nucleotide bases are present in human genome?
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