Which of the following methods would be used to measure the concentration of bacterial contamination in processed peanut butter?
a. turbidity measurement
b. total plate count
c. dry weight measurement
d. direct counting of bacteria on a calibrated slide under the microscope
Ans: b. total plate count
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Chytridiomycosis is thought to be associated with increases in environmental temperature associated with global warming. Design a series of experiments that would help to prove or disprove this hypothesis
What will be an ideal response?
If an enzyme is saturated, this means that
a. the enzymes cannot continue to catalyze the reaction. b. the reaction is at equilibrium. c. the rate of the reaction will slow and the reaction will stop. d. the enzymes need more reactants. e. the enzymes are catalyzing the reaction at the maximum rate.
If the PAX6 gene from a human is inserted into an eyeless mutant fly, what would happen?
a. nothing; human genes cannot be expressed in other species b. the fly will grow normal compound fly eyes in the normal location c. compound eyes will form wherever the gene is expressed d. the fly will develop aniridia e. the fly will grow simple human eyes in the normal location
From what is the lipid-containing outer envelope surrounding the viral capsid of many animal viruses derived?
A) the outer membrane of the chloroplast B) the outer mitochondrial membrane C) the nuclear envelope D) the plasma membrane E) the lysosomal membrane