Structures such as hair and nails are part of the:
A) lymphatic system.
B) muscular system.
C) endocrine system.
D) skeletal system.
E) integumentary system.
Answer: E
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Quorum sensing
A. depends on the sensing of signal protein molecules. B. is a phenomenon in which bacteria monitor their own population density. C. plays an important role in formation of biofilms by Pseudomonas aeruginosa. D. All of the choices are correct.
The reading frame for translation is established by ____
a. removal of the cap from mRNA b. pairing of initiator tRNA with the start codon c. the first base in the mRNA molecule d. the ribosome binding site e. the poly(A) tail
ATP contains
a. adenine. b. cytosine. c. uracil. d. thymine. e. guanine.
Which of the following is false about rifamycins?
A) They were originally isolated from bacteria. B) They are broad-spectrum antimicrobials that are effective against most Gram-positive bacteria and some Gram-negative bacteria too. C) They inhibit transcription by binding to RNA polymerase. D) Because the chemical structure is such a good fit with RNA polymerase, it is unlikely to cause interactions with any other medications currently known. E) The drugs are useful to combat mycobacterial species that can be especially tough to treat due to the challenges of getting drugs across their waxy mycolic acid-enriched cell wall.