An athlete consumes large amounts of meat in an effort to build extra muscle tissue. This practice does not work because:
a. the body has only a limited capacity to store extra amino acids.
b. the body will dismantle its tissue proteins in this situation.
c. meat does not provide sufficient amino acids to build muscle tissue.
d. a diet high in protein does not provide enough total energy to support growth.
e. the body uses excess amino acids as fuel or stores them as fat.
Question 2
Proteins use the process of active transport to move substances into or out of the cell by:
a. opening passages in the membrane and escorting substances into the cell.
b. attaching to minerals to carry them throughout the bloodstream.
c. decreasing the water content in cells to get rid of excess acid or base levels.
d. sending antibodies to cells to carry excess proteins out to where they are needed.
e. binding to insoluble molecules and moving them through osmosis.
Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o
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