Bacteriophages problems
- 1. A bacterial defense mechanism against bacteriophage is called
Options- A. concatamerization
- B. polymerization
- C. restriction
- D. lysogeny Discuss
Correct Answer: restriction
- 2. T-even phage binding to E. coli probably involves
Options- A. electrostatic interaction
- B. hydrophobic interaction
- C. covalent bonds
- D. all of these Discuss
Correct Answer: electrostatic interaction
- 3. Area of lysis on a bacterial lawn culture produced by a phage is known as
Options- A. pock
- B. plaque
- C. pox
- D. all of these Discuss
Correct Answer: plaque
- 4. __________ protein keeps the prophage dormant and prevents virus reproduction.
Options- A. Operator
- B. Promotor
- C. Repressor
- D. Enhancer Discuss
Correct Answer: Repressor
- 5. In viruses with envelopes
Options- A. the envelope and the embedded proteins are encoded by the viral nucleic acid
- B. the envelope is derived from the host but it contains embedded proteins coded by the viral nucleic acid
- C. the envelope is coded by the viral nucleic acids, but the proteins come from the host's membrane proteins
- D. the envelope and its imbedded proteins are derived from the host's membranes Discuss
Correct Answer: the envelope is derived from the host but it contains embedded proteins coded by the viral nucleic acid
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