Aerotolerant anaerobes ________.
A. synthesize superoxide dismutase, but not catalase
B. synthesize both superoxide dismutase and catalase
C. synthesize catalase but not superoxide dismutase
D. synthesize neither superoxide dismutase nor catalase
Answer: A
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All of the following are general components of the growth factor signaling pathway EXCEPT
A. tyrosine kinase-linked receptor. B. GRB2-Sos-Ras complexes. C. phosphorylated transcription factors. D. Raf-1. E. IP3 and Ca2+.
A(n) ________ is a population that has adapted to its unique local environmental conditions
Fill in the blank(s) with correct word
What is the purpose of molecular chaperones?
a. To transfer an amino acid b. To attach a carboxyl group c. To straighten other molecular proteins d. To strengthen the tertiary structure of a protein e. To assist the folding of other molecular proteins
Managers of power-line rights-of-way in the northeastern United States have discovered that dense shrub thickets, once established, can prevent establishment of forest trees. By maintaining shrubs under power lines, managers can greatly reduce the maintenance expenses (for mowing or herbicide application) normally associated with prevention of tree growth beneath power lines. Of which mechanism of succession are these managers taking advantage?
A) facilitation B) inhibition C) tolerance D) none of the above