What do free radicals do?
a. improve the efficiency of aerobic
respiration
b. act as coenzymes in glycolysis
c. damage biological molecules
d. removes metals that combine with oxygen
gas
e. more than one of these
C
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Which amino acid is least soluble in water?
A. Alanine B. Glutamine C. Glycine D. Isoleucine Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about solubility in water? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In experiments designed as those of Hershey and Chase (1952), 35S was added to a virus replicating within its bacterial host. The new virions were carefully isolated and used to infect fresh bacterial cells in the absence of any radioisotopes. Where would you expect to find the 35S radioisotope?
A) in the phage ghosts B) in the bacterial matrix proteins C) in the bacterial DNA D) in the nucleic acid of the new virions E) in the protein coat of the new virions
The best agricultural soil would be composed of a high proportion of
a. clay. b. loam. c. silt. d. soil. e. gravel.
Which hormone stimulates insect growth and molting?
a. ecdysiotropin b. juvenile hormone c. histamine d. pheromone e. ecdysone