Active and passive transport mechanisms differ because
A. active transport requires energy whereas passive transport does not.
B. active transport does not require energy whereas passive transport does.
C. active transport is used for nutrients while passive transport is used for all other substances.
D. passive transport is normally used for all substances; active transport is only used under extreme conditions.
A
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Cancer generally begins with disruptions in:
a. DNA replication. b. nutritional status. c. RNA transcription. d. cell metabolism.
An example of a survey with negative correlations is:
a. when folic acid intake increases prior to pregnancy, the incidence of neural tube defects declines b. when LDL levels increase, the rate of heart disease increases c. when a person becomes more obese, their LDL levels likely rise d. as the intake of peanut butter and potato chips increases, dental caries increase
Approximately one third of riboflavin is supplied in the American diet by
A) meat. B) fruit. C) milk and milk products. D) eggs.
The basic building block of most carbohydrates is
a. galactose. b. fructose. c. sucrose. d. maltose. e. glucose. f. lactose.