Which is incorrect about warts?
A. They can be transmitted by direct contact or fomites.
B. They include deep plantar warts of soles of the feet.
C. They are caused by human papillomaviruses (HPV).
D. Freezing and laser surgery can be used for removal.
E. They are usually cancerous.
Answer: E
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Bioinformatics includes _____. I. using computer programs to align DNA sequences II. creating recombinant DNA from separate species III. developing computer-based tools for genome analysis IV. using mathematical tools to make sense of biological systems
A) I and II B) II and III C) II and IV D) I, III, and IV
Choose the description below that best matches the current model of RNA polymerase holoenzyme.
A. A core enzyme composed of five sigma factors bound by a polypeptide chain. B. A core enzyme composed of five polypeptides bound by ribosomes. C. An open complex or "bubble" formed by DNA, mRNA, and RNA polymerase. D. A core enzyme composed of five polypeptides bound by a transcription factor.
The formation of peptide bonds during translation is catalyzed by peptidyl transferase, an enzyme that
is
a. a protein in the small ribosomal subunit. b. part of an rRNA in the small ribosomal subunit. c. part of an rRNA in the large ribosomal subunit. d. a protein in the large ribosomal subunit. e. carried to the growing peptide chain by a tRNA
The surface area of the small intestine is dramatically increased due to the presence of ________ on the luminal surface.
A. smooth muscle B. capillaries C. lacteals D. hydrolytic enzymes E. villi and microvilli