Which group includes organisms that are unicellular, have two flagella and contain chlorophyll a & c?
A. foraminifera
B. dinoflagellates
C. euglenoids
D. choanoflagellates
Answer: B
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The molten globule model of protein folding suggests:
A. hydrogen bonding of secondary structures drives folding. B. translation of the polypeptide is complete before folding begins. C. each domain of a polypeptide folds independently. D. intermediates of increasing free energy are created. E. hydrophobic residues coalesce to form intermediate structures.
Which of the following genera has proved useful for manipulating plant cells?
A. Escherichia B. Bacillus C. Pseudomonas D. Agrobacterium
The process by which a cell imports large particles by enclosing them in vesicles pinched off from the plasma membrane is called
A. exocytosis. B. pinocytosis. C. phagocytosis. D. nutrient cytosis.
Examples of animals already extinct, or facing extinction as a direct result of deliberate efforts to
exterminate them because of their perceived harm to economically useful species, include:a. cheetahs and rhinos. b. passenger pigeons and cheetahs. c. prairie dogs and rhinos. d. rhinos and macaws. e. mountain lions and wolves.