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MCQs

Total Questions : 101 | Page 4 of 11 pages
Question 31. Which of the following are intracellular second messengers?
  1.    Acetylcholine
  2.    Glycine
  3.    IP₃
  4.    Glutamate
 Discuss Question
Answer: Option C. -> IP₃
Answer: (c).IP₃
Question 32. How do steroid hormones produce their effects in cells?
  1.    By activating key enzymes in metabolic pathway
  2.    By binding to intracellular receptors and promoting transcription of specific genes
  3.    By promoting the degradation of specific m-RNAs
  4.    By activating translation of certain m-RNAs
 Discuss Question
Answer: Option B. -> By binding to intracellular receptors and promoting transcription of specific genes
Answer: (b).By binding to intracellular receptors and promoting transcription of specific genes
Question 33. Steroid regulatory proteins mediate the act by binding at ___________
  1.    Zinc finger motif
  2.    Leucine zipper motif
  3.    Helix turn helix motif
  4.    Histone helix motif
 Discuss Question
Answer: Option A. -> Zinc finger motif
Answer: (a).Zinc finger motif
Question 34. Which is an example of negative regulator?
  1.    CAP
  2.    Lac 1 gene
  3.    Nuclear receptors
  4.    Phosphorylated STAT proteins
 Discuss Question
Answer: Option B. -> Lac 1 gene
Answer: (b).Lac 1 gene
Question 35. Which out of the following statements is true about gene regulation in bacteria?
  1.    Repressor protein blocks transcription by binding to operator sequence
  2.    Activator proteins bind near promoters and increase the efficiency of transcription
  3.    Enhancers commonly regulate transcription
  4.    Genes with related functions are often grouped together and have a single start codon
 Discuss Question
Answer: Option A. -> Repressor protein blocks transcription by binding to operator sequence
Answer: (a).Repressor protein blocks transcription by binding to operator sequence
Question 36. Which is an example of a positive regulator?
  1.    CAP
  2.    Lac 1 gene
  3.    Trp operon
  4.    Met operon
 Discuss Question
Answer: Option A. -> CAP
Answer: (a).CAP
Question 37. Autophosphorylation is done on _________
  1.    His residues
  2.    Ser/Thr residues
  3.    Cys residues
  4.    Lys residues
 Discuss Question
Answer: Option B. -> Ser/Thr residues
Answer: (b).Ser/Thr residues
Question 38. ERF1is a _________
  1.    Translation terminating factor
  2.    Positive regulator
  3.    Translation promoting factor
  4.    Enzyme inhibitor
 Discuss Question
Answer: Option A. -> Translation terminating factor
Answer: (a).Translation terminating factor
Question 39. In Arabidopsis flg22 binds to _________
  1.    FLS2
  2.    LPS
  3.    BAK1
  4.    MAPK
 Discuss Question
Answer: Option A. -> FLS2
Answer: (a).FLS2
Question 40. Transcription factor in plants is _________
  1.    Serine
  2.    Threonine
  3.    WRKY22/29
  4.    Leucine
 Discuss Question
Answer: Option C. -> WRKY22/29
Answer: (c).WRKY22/29

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