An autosomal recessive disorder ____
a. requires that only one parent be a carrier
b. displays its symptoms in heterozygotes
c. is more frequent in males than females
d. requires that both parents are carriers
e. only affects females
ANSWER: d
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Alcohol is a waste product produced by yeast in the presence of sugar and the absence of ________.
A. ATP B. H2O C. CO2 D. O2
Based on the energy and carbon sources of humans, how would humans be classified?
A. as chemoautotrophs B. as chemoheterotrophs C. as photoheterotrophs D. as photoautotrophs
You are in charge of water quality for your city's water treatment plant. Of the methods at your disposal, which will be the most efficient and cheapest method of determining the number of viable bacteria in the water coming out of your plant?
A. Direct counts using a microscope and a counting chamber. B. Using a Coulter counter machine. C. Performing serial dilutions of your samples and doing spread plate counts. D. Using membrane filtration followed by placing the membrane in a growth medium for colony counts after incubation. E. Biochemical analysis of secondary metabolites in the water that are given off by bacteria.
Four of the five choices below are
characteristics of adaptive immunity. Select the EXCEPTION.
a. self/non-self recognition b. specificity c. diversity d. fever e. memory