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Genetic Code and Regulation (Biochemistry) Question and Answers-Page first

Genetic Code and Regulation problems


  • 1. Translation begins

  • Options
  • A. at the replication fork
  • B. on the lagging strand
  • C. at the start codon
  • D. in nucleus
  • Discuss
  • 2. The sequence of one strand of DNA is: 5' ATTGCCA 3', what is the sequence of the other strand?

  • Options
  • A. 5' TAACGGT 3'
  • B. 5' TGGCAAT 3'
  • C. 5' ATTGCCA 3'
  • D. 5' UAAGCCU3'
  • Discuss
  • 3. Bacterial protein called catabolic activator protein (CAP) is an example of

  • Options
  • A. negative control of gene expression
  • B. positive control of gene expression
  • C. second type of positive control of gene expression
  • D. none of the above
  • Discuss
  • 4. The genetic code is degenerated. Which of the following codons represents the principle of degeneracy?

  • Options
  • A. UAA and UAC
  • B. AUG and AUA
  • C. CAU and CAC
  • D. UUA and UUC
  • Discuss
  • 5. In prokaryotes, AUG encodes

  • Options
  • A. methionine
  • B. N-formyl methionine
  • C. a stop codon
  • D. alanine
  • Discuss
  • 6. Which of the following has been used as an evidence that primitive life forms lacked both DNA and enzymes?

  • Options
  • A. RNA can both code genetic information and act as a catalyst
  • B. DNA and enzymes are only present in the most advanced cells
  • C. Advanced cells lack RNA
  • D. All of the above
  • Discuss
  • 7. The codons which do not specify an amino acid are called

  • Options
  • A. initiation code
  • B. termination code
  • C. propagation code
  • D. none of these
  • Discuss
  • 8. AUG codes for methionine act as a

  • Options
  • A. initiation code
  • B. elongation code
  • C. termination code
  • D. propagation code
  • Discuss
  • 9. In protein synthesis in prokaryotes

  • Options
  • A. the initiating amino acid is N- formyl methionine
  • B. the initiating amino acid is methionine
  • C. the initiating amino acid is phenyl alanine
  • D. none of the above
  • Discuss
  • 10. In some organelles in eukaryotes, the genetic code for some codons

  • Options
  • A. differs from that used in prokaryotes
  • B. are same
  • C. are partially same
  • D. none of the above
  • Discuss

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