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MCQs

Total Questions : 348 | Page 32 of 35 pages
Question 311. When was the operation mechanism of a bacterial operon first elucidated?
  1.    1961
  2.    1971
  3.    1981
  4.    1991
 Discuss Question
Answer: Option A. -> 1961
Answer: (a).1961
Question 312. In a bacterial operon, which is located downstream of the structural genes?
  1.    operator
  2.    inducer
  3.    promoter
  4.    regulatory gene
 Discuss Question
Answer: Option D. -> regulatory gene
Answer: (d).regulatory gene
Question 313. Which is a DNA-binding protein?
  1.    repressor
  2.    operator
  3.    luciferase
  4.    thymidine
 Discuss Question
Answer: Option A. -> repressor
Answer: (a).repressor
Question 314. The repressor protein is encoded by _________________
  1.    regulatory gene
  2.    structural gene
  3.    transfer-DNA
  4.    ribosomal-RNA
 Discuss Question
Answer: Option A. -> regulatory gene
Answer: (a).regulatory gene
Question 315. The structural genes in an operon lie adjacent to one another.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 316. Which of following does not code for Glycine?
  1.    AUU
  2.    GGU
  3.    GGA
  4.    GGC
 Discuss Question
Answer: Option A. -> AUU
Answer: (a).AUU
Question 317. RNA molecules that function as enzymes are called
  1.    RNAse
  2.    RNA cutter
  3.    ribozymes
  4.    spliceosome
 Discuss Question
Answer: Option C. -> ribozymes
Answer: (c).ribozymes
Question 318. How many different types of Aminoacyl-tRNA synthetases are there in a cell?
  1.    3
  2.    56
  3.    90
  4.    20
 Discuss Question
Answer: Option D. -> 20
Answer: (d).20
Question 319. How many total codons are there that code for proteins?
  1.    19
  2.    64
  3.    26
  4.    89
 Discuss Question
Answer: Option B. -> 64
Answer: (b).64
Question 320. Which of following is site of post-transcriptional modifications?
  1.    cell membrane
  2.    endoplasmic reticulum
  3.    nucleus
  4.    ribosomes
 Discuss Question
Answer: Option B. -> endoplasmic reticulum
Answer: (b).endoplasmic reticulum

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