Viruses that infect bacteria are:
a. Not known to exist
b. Prions
c. Bacteriophages
d. Composed of protein only
e. Also capable of causing disease in humans
Answer: c. Bacteriophages
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The lac operon is an example of ________ control in which the presence of an ________ is required for transcription to occur
A) negative / activator B) negative / inducer C) positive / activator D) positive / inducer
Which of the following statements is not true concerning peptidyl transferase?
A) It is a ribozyme having catalytic activity. B) It catalyzes peptide bond formation. C) It moves the ribosome, so translation continues. D) It is associated with the large subunit of ribosomes. E) It requires no outside source of additional energy, such as ATP.
A physiological alarm reaction, followed by resistance, and ending with exhaustion is known as _____.
A. the fight or flight response B. the general adaptation syndrome C. HPA axis D. SAM system
A clear area against a confluent "lawn" of bacteria is called a
A) phage. B) pock. C) cell lysis. D) plaque. E) rash.