Translation and Regulation problems
- 1. A quorum sensing system
Options- A. detects a signal from the external environment
- B. senses a compound produced by the bacterium itself
- C. consists of a sensor component that phosphorylates a regulatory protein
- D. controls the activity of ribosomes directly Discuss
Correct Answer: senses a compound produced by the bacterium itself
- 2. What was the first bacterial genome to be sequenced and made public?
Options- A. Bacillus subtilis
- B. Escherichia coli
- C. Haemophilus influenzae
- D. No bacterial genome has been sequenced yet Discuss
Correct Answer: Haemophilus influenzae
- 3. Which of the following three codons translate as serine (Ser)?
Options- A. AGU
- B. CGA
- C. CAU
- D. AUG Discuss
Correct Answer: AGU
- 4. Which of the termination codon is called amber?
Options- A. UAA
- B. UAG
- C. UGA
- D. AUG Discuss
Correct Answer: UAG
- 5. What are the Svedberg values for the subunits of the 70S ribosomes of E. colli?
Options- A. 40S and 30S
- B. 50S and 20S
- C. 50S and 30S
- D. 40S and 20S Discuss
Correct Answer: 50S and 30S
- 6. The development of global regulatory systems in prokaryotes
Options- A. determines the exact location of the cell on the globe
- B. aids in DNA replication
- C. determines the exact location of the replication site
- D. regulates many genes under varying environmental conditions Discuss
Correct Answer: regulates many genes under varying environmental conditions
- 7. Which of the following statement is correct?
Options- A. The size and sequence of introns can be deduced from the cDNA sequence
- B. Restriction endonuclease can cleave ss and dsDNA both
- C. Restriction fragment length polymorphism (RFLP) is usually formed in coding sequence of a gene
- D. Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide Discuss
Correct Answer: Amino acid sequence of a protein can be deduced from corresponding cDNA nucleotide
- 8. Which of the following modified amino acid is used at the starting of most prokaryotic proteins?
Options- A. N-formylserine
- B. N-formylmethionine
- C. N-formylleucine
- D. N-formylalanine Discuss
Correct Answer: N-formylmethionine
- 9. Negative regulation of protein synthesis is accomplished by
Options- A. allosteric inhibition
- B. the binding of RNA polymerase to the promoter
- C. the binding of a repressor to the DNA
- D. the binding of a repressor to the RNA polymerase Discuss
Correct Answer: the binding of a repressor to the DNA
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