Aquifex cannot use which of the following as electron donors?

A. Sulfur
B. Glucose
C. Hydrogen
D. Thiosulfate


Answer: B

Biology & Microbiology

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Which of the following is not correct nomenclature for a nucleotide?

A. deoxyuridylate B. deoxythymidylate C. cytidine 5'-monophosphate D. deoxyguanosine E. adenosine 5'-monophosphate

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Viral chromosomes exist in a variety of conformations and can be made up of ________

A) DNA only B) DNA, RNA, or protein C) protein- or lipid-coding sequences D) DNA or RNA E) RNA only

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Among non-mammalian vertebrates, the cloaca is an anatomical structure that functions as _____

A) a specialized sperm-transfer device produced only by males B) a shared pathway for the digestive, excretory, and reproductive systems C) a source of nutrients for developing sperm in the testes D) a gland that secretes mucus to lubricate the vaginal opening

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Prokaryotes reproduce by means of meiosis.

a. true b. false

Biology & Microbiology