Carboxydotrophic bacteria oxidize carbon monoxide to
A) carbon dioxide.
B) methane.
C) acetate.
D) glucose.
Answer: A
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Which molecule catalyzes covalent bond formation between fragments of DNA.
A. helicase. B. ligase. C. polymerase. D. primase. E. nuclease.
Substrate activation may involve
A) a change in enzyme conformation induced by substrate binding. B) accepting protons from the enzyme. C) formation of temporary covalent bonds. D) donation of protons to the enzyme. E) All of these are correct.
A seed that lands in the forest soil is homozygous mutant for the CONSTANS (CO) gene, and as a result does not produce any functional CONSTANS protein. What do you predict will happen during the development of this seed?
A. It will germinate and grow vegetatively. If it is from a photoperiodic species, it will fail to produce flowers. B. It will fail to germinate. C. It will germinate and grow vegetatively, but will never produce flowers. D. It will germinate and grow vegetatively, and then it will produce flowers earlier than wildtype.
In the Hotchkiss-McManus modification of the PAS technique, aldehydes are formed by:
a) periodic acid b) chromic acid c) potassium permanganate d) sodium bisulfate