Most of the dry weight of a microbial cell is from ________.
A. water
B. organic compounds
C. salts
D. minerals
E. inorganic compounds
Answer: B
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Genetic information is translated into ____, which direct(s) the chemical activity of an organism
a. DNA b. carbohydrates c. lipids d. proteins e. inorganic material.
What is the main reason for using food webs instead of food chains in analyzing ecosystems?
I) Most organisms eat more than one type of food. II) Most organisms feed at several trophic levels. III) The decomposition cycle needs to be shown. A) only I B) only II C) only III D) only I and II E) I, II, and III
One way N. gonorrhoeae became resistant to penicillin was by acquiring a plasmid that carries the penr penicillin resistance gene, which encodes a protein that
A) allows cells to synthesize penicillin. B) cleaves penicillin to an inactive form. C) pumps penicillin out of the cell. D) attaches penicillin to the cell wall.
A situation in which the heterozygote offspring of two homozygotes show an phenotype intermediate between those of the parents is called:
a) a single-gene trait. b) heterozygote superiority. c) a test-cross. d) incomplete dominance. e) multiple allelism.