The movement of molecules across a membrane from an area of lower concentration to an area of higher concentration with the expenditure of energy is called
A. active transport.
B. passive diffusion.
C. osmosis.
D. facilitated diffusion.
Answer: A
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A) primary B) secondary C) tertiary D) quaternary E) primary, secondary, tertiary, and quaternary
A student is observing microorganisms in a sample of pond water. One organism of interest has an obvious nucleus and has been moving rapidly during observation and appears to have rows of cilia along its surface. In which of the following groups would this microbe most likely be classified?
A. Eukaryotes (Fungi) B. Bacteria C. Eukaryotes (Protozoa) D. Eukaryotes (Algae)
In the 20th century, scientists harnessed the natural metabolic reactions of bacteria to make ________ for the first time in an industrial setting.
A. soy sauce B. acetone C. wine D. cheese E. alcohol
The electrons derived from the oxidation of NADPH to NADP+ are used to reduce _______ to ________.
Fill in the blank(s) with the appropriate word(s).