The sequential order of the amino acids in the polypeptide chain is called the ________.
A. primary structure
B. secondary structure
C. tertiary structure
D. quaternary structure
Answer: A
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Which of the following is TRUE of transporters?
a. Simple diffusion and facilitated diffusion both require proteins to move substances across membranes. b. Facilitated diffusion is the only transport mechanism that can transport substances against a concentration gradient. c. Water is only transported across membranes by simple diffusion. d. The only transport mechanism that requires energy is active transport.
Growth rates slow during the preschool years
Indicate whether the statement is true or false
What is meant by the bioavailability of a vitamin in food?
a. The total amount available from plant and animal food b. The amount absorbed and subsequently used by the body c. The amount that escapes destruction from food processing d. The number of different chemical forms of the same vitamin
Adding about 50 mg of _____ per cup of a beverage is thought to enhance absorption of its water from the GI tract, but large quantities might slow the muscles' receipt of water
a. sucrose b. glucose polymers c. sodium d. calcium