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MCQs

Total Questions : 348 | Page 3 of 35 pages
Question 21. MateRNAl substances in egg that influence course of early development are called
  1.    embryonic determinants
  2.    cytoplasmic determinant
  3.    mateRNAl factors
  4.    egg factors
 Discuss Question
Answer: Option B. -> cytoplasmic determinant
Answer: (b).cytoplasmic determinant
Question 22. Myoblasts are precursor of which of following cells?
  1.    muscles
  2.    neurons
  3.    blood
  4.    bones
 Discuss Question
Answer: Option A. -> muscles
Answer: (a).muscles
Question 23. How much Protein-coding DNA accounts in total human genome?
  1.    0.015
  2.    0.03
  3.    0.19
  4.    0.9
 Discuss Question
Answer: Option A. -> 0.015
Answer: (a).0.015
Question 24. Which of following is an example of inducive operon?
  1.    trp
  2.    mac
  3.    l arabinose
  4.    lac
 Discuss Question
Answer: Option D. -> lac
Answer: (d).lac
Question 25. Trp repressor protein is a product of which of following types of genes?
  1.    controlling
  2.    regulatory
  3.    stopping
  4.    metabolic
 Discuss Question
Answer: Option B. -> regulatory
Answer: (b).regulatory
Question 26. Which of the two strands of DNA will be transcribed is determined by the _______________
  1.    RNA polymerase
  2.    DNA polymerase
  3.    Promoter sequence
  4.    Inducer sequence
 Discuss Question
Answer: Option C. -> Promoter sequence
Answer: (c).Promoter sequence
Question 27. Promoter is a ____________________
  1.    gene
  2.    site on DNA
  3.    site on RNA
  4.    toxin
 Discuss Question
Answer: Option B. -> site on DNA
Answer: (b).site on DNA
Question 28. Which enzyme makes the transcription, an essentially irreversible process?
  1.    pyrophosphatase
  2.    amylase
  3.    glucamylase
  4.    topoisomerase
 Discuss Question
Answer: Option A. -> pyrophosphatase
Answer: (a).pyrophosphatase
Question 29. In bacteria, binding of _________ factor to the RNA polymerase increases its affinity for promoter sites in the DNA.
  1.    alpha
  2.    sigma
  3.    rho
  4.    beta
 Discuss Question
Answer: Option B. -> sigma
Answer: (b).sigma
Question 30. The transcription factors assist the RNA polymerase in locating ________________
  1.    stop codon
  2.    mutation
  3.    active site
  4.    promoter
 Discuss Question
Answer: Option D. -> promoter
Answer: (d).promoter

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