Briefly state the role microorganisms play in each of the following:
a. Biological control of pests
b. Recycling of elements
c. Normal microbiota
d. Sewage treatment
e. Human insulin production
f. Vaccine production
g. Biofilms

Which of the following is the most important element of Koch’s germ theory of disease? The animal shows disease symptoms when

a. the animal has been in contact with a sick animal.

b. the animal has a lowered resistance.

c. a microorganism is observed in the animal.

d. a microorganism is inoculated into the animal.

e. microorganisms can be cultured from the animal.

How did the idea of spontaneous generation come about?

Recombinant DNA is

a. DNA in bacteria

b. The study of how genes work

c. The DNA resulting when genes of two different organisms are mixed

d. The use of bacteria in the production of foods

e. The production of proteins by genes

Which of the following is a scientific name?

a. Mycobacterium tuberculosis

b. Tubercle bacillus

Into which field of microbiology would the following scientists best fit?

Which of the following is not a characteristic of bacteria?

a. Are prokaryotic

b. Have peptidoglycan cell walls

c. Have the same shape

d. Grow by binary fission

e. Have the ability to move