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MCQs

Total Questions : 348 | Page 5 of 35 pages
Question 41. Genes with intervening (non-coding) sequences are called ___________________
  1.    axons
  2.    exons
  3.    split genes
  4.    jumping genes
 Discuss Question
Answer: Option C. -> split genes
Answer: (c).split genes
Question 42. The studies that led to discovery of posttranscriptional gene silencing phenomena were performed on ____________
  1.    petunia
  2.    sunflower
  3.    maize
  4.    wheat
 Discuss Question
Answer: Option A. -> petunia
Answer: (a).petunia
Question 43. Which technique was used to find the relationship between 15S and 10S globin RNAs?
  1.    S-loop formation
  2.    R-loop formation
  3.    Pulsed-field gel electrophoresis
  4.    Polymerase chain reaction
 Discuss Question
Answer: Option B. -> R-loop formation
Answer: (b).R-loop formation
Question 44. Which of the following prevents the digestion of mRNA by exonucleases?
  1.    methyl-guanosine cap
  2.    methylene blue
  3.    poly(A) tail
  4.    bromophenol blue
 Discuss Question
Answer: Option A. -> methyl-guanosine cap
Answer: (a).methyl-guanosine cap
Question 45. When was it first discovered that RNA molecules are capable of catalyzing chemical reactions?
  1.    1962
  2.    1972
  3.    1982
  4.    1992
 Discuss Question
Answer: Option C. -> 1982
Answer: (c).1982
Question 46. Which type of RNAs suppress the movement of transposons in the germline?
  1.    mRNAs
  2.    piRNAs
  3.    miRNAs
  4.    tRNAs
 Discuss Question
Answer: Option B. -> piRNAs
Answer: (b).piRNAs
Question 47. PIWI proteins have been best studied in _________________
  1.    mice
  2.    fruit flies
  3.    nematodes
  4.    maize
 Discuss Question
Answer: Option B. -> fruit flies
Answer: (b).fruit flies
Question 48. How many codons do not code for amino acids?
  1.    3
  2.    5
  3.    9
  4.    11
 Discuss Question
Answer: Option A. -> 3
Answer: (a).3
Question 49. Who elaborated on the significance of codons?
  1.    George Gamow
  2.    Thomas Morgan
  3.    H. J. Muller
  4.    James Watson
 Discuss Question
Answer: Option A. -> George Gamow
Answer: (a).George Gamow
Question 50. The genetic code is degenerate.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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