Which is NOT a major function of proteins?
A. Provides cell structure.
B. Stores energy for the cell.
C. Functions as regulator molecules in cellular activity.
D. Functions as carrier molecules.
B. Stores energy for the cell.
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What mechanism is responsible for moving water in the xylem?
A. Respiration B. Digestion C. Photosynthesis D. Transpiration
Dictyostelium discoideum is an unusual organism, one that straddles the boundary between the unicellular and the multicellular. Its feeding phase consists of individual amoeba-like cells that move independently, feeding on bacteria by phagocytosis. When the food runs out, cells begin to aggregate into a multicelled structure that migrates toward light. The cells differentiate into a base, stalk, and spores; only the spores survive to colonize a new habitat. What is the advantage of forming spores?
A. Spores can mate with other species. B. Spores are smaller and can be transported to new habitats. C. The spores will eat the other cells. D. Spores have flagella and can swim to new habitats. E. The spores are photosynthetic.
ATP
a. can be produced by endocytosis. b. is the by-product of the biosynthesis of organic compounds such as glucose. c. is produced in greatest amounts during anaerobic respiration. d. is released in aerobic respiration. e. is released in anaerobic respiration.
Prolactin appears to help us recognize familiar faces and trust other people. Indicate whether the statement is true or false