Which of the following processes can be used to bring nutrients into a cell against a concentration gradient?

A. Active transport
B. Facilitated diffusion
C. Active transport and facilitated diffusion
D. Passive diffusion


Answer: A

Biology & Microbiology

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Indicate whether the statement is true or false.

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The disease that decimated the potato crop in 19th century Ireland was a

a. bacterium. b. protist. c. virus. d. fungus. e. plasmodium.

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Mutation frequency is the

A) number of mutations per gene per generation. B) number of mutations per nucleotide per generation. C) number of mutations per cell per generation. D) number of a specific mutation in a defined population. E) total number of mutations in a defined population.

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What are the monomer "building blocks" that make up proteins?

A) monosaccharides B) glycerol molecules C) amino acids D) fatty acids

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