The chemolithotrophs that metabolize reduced sulfur compounds using oxygen as a terminal electron acceptor in the Winogradsky column include ________.

A. cyanobacteria
B. Chromatium
C. Desulfovibrio
D. Beggiatoa


Answer: D

Biology & Microbiology

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Red-green color blindness is inherited as a sex-linked recessive trait. The gene is found on the X chromosome. Can a man with normal color vision father a daughter who is red-green color-blind?

A) Yes, if the woman with whom he mates is red-green color-blind. B) Yes, if the man is heterozygous for red-green color blindness. C) No, he can't (unless there is a mutation). D) No, the expression of the trait skips a generation.

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Which of the following may possess primary, secondary, tertiary, and quaternary structures?

A) Nucleic acids B) Lipids C) Proteins D) Carbohydrates

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The type of life cycle seen in plants is called

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