What describes the movement of substances down their concentration gradients?
A. Active transport
B. Saturation
C. Diffusion
D. Bulk transport
Answer: C
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The cyclic nitrogenous base used in transcription, uracil, is a ________.
A. purine B. porphyrin C. protein D. pyrimidine
Which is true of the following reaction: Pi + ADP -> ATF?
A. It has a change in free energy that is less than 0. B. It has a change in free energy that is greater than 0. C. It can be used to drive endergonic reactions. D. It yields energy. E. It has a change in free energy that is greater than 0, and hence can be used to drive endergonic reactions.
The formation of a cyst enables a protozoan to
a. move b. synthesise protein c. survive in the external environment d. increase rapidly in number
During the Gram stain procedure, a Gram _________ cell will be purple after the addition of Crystal Violet, and clear after the decolorization step.
A) Negative B) Positive