Arsenic is a common hazardous waste that can contaminate soil and water surrounding smelting facilities. A bioprocess has been developed using naturally occurring bacteria that can remove the arsenic. This process is an example of:

A. Genetic engineering
B. Bioremediation
C. Nitrogen fixation
D. Fermentation


Ans: B. Bioremediation

Biology & Microbiology

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Which of the following bacteria lack a cell wall?

A. Treponema pallidum B. Mycobacterium tuberculosis C. Staphylococcus aureus D. Mycoplasma pneumoniae

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Reactions that use the equivalent of a water molecule to break a molecule into smaller subunits are

called ____ reactions.

a. equilibrium b. hydration c. hydrolysis d. redox e. dehydration synthesis

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The gene frequencies of a population can be expected to change if 

A. the population is small. B. no mutation occurs. C. no migration occurs into or out of the population. D. random mating occurs.

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Which sequence represents the most typical order of events in seed germination?

a. shoot cells divide and elongate ? root cells divide and elongate ? seed coat splits ? water imbibition b. seed coat splits ? water imbibition ? root cells divide and elongate ? shoot cells divide and elongate c. water imbibition ? seed coat splits ? root cells divide and elongate ? shoot cells divide and elongate d. water imbibition ? root

Biology & Microbiology