Which method is a statistical estimating technique used to determine the number of bacteria in a sample?
a) Turbidity
b) Spread plate method
c) Most probable number method
d) Pour plate method
Ans: c) Most probable number method
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Which type of microscopy has the greatest resolving power?
A) electron B) phase-contrast C) fluorescence D) digital video E) confocal scanning
What percentage of the world's tropical forests have been cut down for cropland, fuel wood, grazing
land and timber? a. 20% b. 30% c. 40% d. 50% e. 60%
What proteins are bound to enhancers, forming a protein "bridge" that bends the DNA over the promoter to initiate transcription?
What will be an ideal response?
The two molecules that alternate to form the backbone of a polynucleotide chain are:a
adenine and thymine. b. cytosine and guanine. c. sugar and phosphate. d. base and sugar. e. base and phosphate.