Enzyme activity can be controlled by

A. covalent modification.
B. allosteric regulation.
C. feedback (end product) inhibition.
D. All of the choices are correct.


Answer: D

Biology & Microbiology

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The number of protons in a given atom is equal to its:

A. neutron number B. mass C. atomic number D. molecular number

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Which of the following rRNA molecules is not associated with the large subunit of the eukaryotic ribosome?

A) 28S B) 5.8S C) 5S D) 16S E) Neither B nor D is associated.

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Cold, fast-moving freshwater holds ____ than still, warm water

a. more oxygen b. less oxygen c. more carbon dioxide d. less nutrients e. more nutrients

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Industrial melanism is a term

A. describing the color change induced by living in industrialized areas. B. describing the widespread implementation of pollution controls. C. describing the evolutionary process in which initially light-colored organisms become dark as a result of natural selection. D. explaining that the darker moths have higher mutation rates because of industrialization. E. explaining that the darker moths having higher reproductive success because of their pigmentation.

Biology & Microbiology