What protein fibers help form the framework of structural support for cells?
A) centriole
B) cholesterol
C) chromatin
D) cytoskeletal elements
D
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What is the major distinguishing characteristic of fungi?
A) acquiring nutrition through ingestion B) sedentary lifestyle C) prokaryotic cells D) absorbing nutrients E) decomposing dead organisms
With the E. coli trp operon where both repression and attenuation occur, the extent of regulation achieved by repression is ________ the extent of regulation achieved by attenuation.
A. greater than B. less than C. the same as D. Repression is not used in the regulation of the E. coli trp operon.
A group is considered paraphyletic if
A. all members of the group share a common ancestor. B. not all descendants of the common ancestor are included. C. the common ancestor of the group is not included in the group. D. the group does not contain the most recent common ancestor. E. it is the most parsimonious grouping.
An increase in the concentration of which of the following within the interstitial space surrounding an arteriole would cause that vessel to constrict?
A) lactic acid B) adenosine C) prostacyclin D) nitric oxide E) oxygen