Used to carry the genetic code
(A) Proteins
(B) Carbohydrates
(C) Nucleic acids
(D) Lipids
(E) Steroids
Ans: (C) Nucleic acids
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The observation that different geographical areas sometimes exhibit plant and animal communities of similar appearance, even though the individual plants and animals are not closely related, is called
A. the fossil record. B. homology. C. convergent evolution. D. divergent evolution. E. adaptation.
The reaction phosphoenolpyruvate + ADP ? pyruvate + ATP (? G = -7.5 kcal/mole)
A. is not spontaneous. B. involves the transfer of a phosphate to phosphoenolpyruvate. C. involves the transfer of energy from ATP to phosphoenolpyruvate. D. is an endergonic reaction. E. is an exergonic reaction.
Waste products that contain nitrogen are produced by cells as the metabolize ____.
Fill in the blank(s) with the appropriate word(s).
Which is correct regarding the rate of microbial death?
A. Upon contact with the control agent, all cells die at one time. B. Cells die at increasingly greater rates. C. Only older cells die in a culture. D. Cells in a culture die at a constant rate. E. Cells become metabolically inactive but are never killed.