A sheep eating by pulling the plant out of the

ground is an example of



a. parasitism.
b. predation.
c. commensalism.
d. mutualism.
e. competitive exclusion


B

Biology & Microbiology

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Once transduction of a signal is complete, the receptor and its bound signaling molecule are removed from the cell

surface by ____.

a. hydrolysis b. diffusion c. endocytosis d. pinocytosis e. exocytosis

Biology & Microbiology

An atom that normally has __________ in its outermost shell would NOT tend to form chemical bonds with other atoms

a. 8 electrons b. 3 electrons c. one electron d. 4 electrons

Biology & Microbiology

Which of the following is the major sign or symptom of mumps?

A) diarrhea B) nausea and vomiting C) deafness D) parotitis E) difficulty in breathing

Biology & Microbiology

What would likely result from a mutation in the promoter for lac operon structural genes that increased the number of RNA polymerase molecules that bind to the DNA?

A. lacI protein production would increase. B. Lactose would be metabolized much faster. C. Polycistronic mRNA production would increase. D. Lactose would be metabolized much slower. E. Repression at the lacO site would not be reduced but expression would increase regardless.

Biology & Microbiology