Which of the following leukocytes are classified as granulocytes?
a. monocytes
b. lymphocytes
c. macrophages
d. natural killer cells
e. neutrophils
E
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Inhibitors of protein synthesis typically key on
A. peptidoglycan precursors. B. penicillin-binding proteins. C. ribosomes. D. porin proteins.
Nitrogen is the most abundant element in the atmosphere, and a crucial component of proteins, vitamins, and nucleic acids. However, plants and other producers cannot use nitrogen in its natural form (N2)
Nitrogen has to undergo a process called nitrogen fixation. What does this process involve? A) It is the synthesis of ammonia from nitrogen gas by certain bacteria. B) Nitrate is converted to ammonia. C) Ammonia is converted to nitrate. D) It is undertaken by denitrifying bacteria. E) Nitrogen is accumulated in dead organic matter.
Captive breeding
A) has allowed for the reintroduction of many species to areas from which they had disappeared. B) does not require an understanding of the behavior and ecological niche of the target species. C) can work for animals but is generally not used for endangered plants. D) is the main conservation technique used to try to save endangered species from extinction.
Which of the following types of mutations could result in a frameshift mutation?
A. either an insertion or a deletion of a base B. a base insertion only C. a base deletion only D. deletion of three consecutive bases E. a base substitution only