Which best describes a catabolic reaction?
a. It involves the expenditure of energy.
b. It involves the anabolic production of complex molecules.
c. It involves the breakdown of life sustaining processes within cells.
d. It involves the breakdown of large organic molecules to simple building blocks.
e. It involves the building up of complex organic molecules from simple building blocks.
d
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Cyclic 2,3-diphosphoglycerate (cDPG) is present in molar quantities in the cytoplasm of many hyperthermophilic methanogens. The function of this compound is to
A) prevent rRNA misfolding. B) prevent chemical damage to DNA at high temperatures. C) counteract the effects of high osmotic environments. D) activate hydrogen gas.
In bone, crystals of calcium phosphate impregnate the extracellular matrix containing fibers of
A. troponin. B. myosin. C. actin. D. chitin. E. collagen.
How much Golden Rice will supply a child’s
daily need for the vitamin that is converted from beta-carotene?
a. two teaspoons b. a half of a cup c. one cup d. one quart e. one pint
Which of the following types of cells would a flu virus most likely target as the means of entry into the body?
A. epithelial cells lining the respiratory system B. epithelial cells on the skin's surface C. red blood cells that are exposed through breaks in the skin D. osteoclasts within bone cells