Under normal conditions how much air from each breath is considered “dead space” air?
a. 0 ml
b. 100 ml
c. 150 ml
d. 300 ml
e. 500 ml
ANSWER: c
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Which of the following is NOT a recent discovery that has had a huge impact on the understanding of microbiology?
A. PCR technique B. Restriction enzymes C. Small RNAs D. Biofilms E. All are significant discoveries.
What is the general term for a large molecule built up of a long chain of identical or nearly identical
subunits connected by covalent bonds?
a. lipid b. functional group c. polymer d. carbohydrate e. multimer
The type of microscope that uses two or more glass lenses to refract light in order to enlarge an image
is a(n) a. compound light microscope. b. electron microscope. c. transmission electron microscope. d. scanning electron microscope. e. scanning tunneling microscope.
Which of the following is a true statement concerning genetic variation?
a. it is created by the direct action of natural selection b. it arises in response to changes in the environment c. it must be present in a population before natural selection can act upon the population d. it tends to be reduced by the processes involved when diploid organisms produce gametes e. a population that has a higher average heterozygosity has less genetic variation than on with a lower average heterozygosity