The alpha helix and beta pleated sheet are examples of
A. tertiary structure.
B. primary structure.
C. gamma structure.
D. secondary structure.
E. quaternary structure.
Answer: D
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When species diversity is calculated, what is being measured?
A. Species number. B. The evapotranspiration rate. C. Both species number and relative abundance. D. The resistance of a community to disturbance. E. The process of inhibition.
Describe the three energy systems found in humans
What will be an ideal response?
Which chemical group can act as an acid?
A) amino B) carbonyl C) carboxyl D) methyl
Considering that virtually all cells in any given individual contain the same genetic information, how is it possible to
have different cell types with unique functions? a. Gene expression is regulated such that different cell types produce different proteins. b. All cells express all proteins encoded in an organism’s genes, but turn them on selectively. c. Gene expression is regulated based on the age of the organism. d. Only some cell types make protein products, while others do not. e. Cells lose unneeded genes with each cell division.