A soup container was forgotten in the refrigerator and shows contamination. The contaminants are probably which of the following?

A. thermophiles
B. acidophiles
C. mesophiles
D. psychrotrophs


Answer: D. psychrotrophs

Biology & Microbiology

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The immediate energy source that drives ATP synthesis by ATP synthase during oxidative phosphorylation is

A) the oxidation of glucose and other organic compounds. B) the flow of electrons down the electron transport chain. C) the affinity of oxygen for electrons. D) the H+ concentration gradient across the inner mitochondrial membrane. E) the transfer of phosphate to ADP.

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The hormone ____ is involved in a positive feedback cycle that results in strong uterine contractions during labor.

A. estrogen B. oxytocin C. cortisol D. progesterone E. prolactin

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What subphylum do tunicates and seq squirts belong to?

A. Animalia B. Cephalochordata C. Chordata D. Urochordata E. Vertebrata

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Which of the following is a double-stranded RNA virus?

A. Picornaviridae B. Coronaviridae C. Retroviridae D. Reoviridae E. Rhabdoviridae

Biology & Microbiology