1. A bacterium is said to be a human pathogen

a. it grows well inside humans
b. it is recognized by the immune response
c. it can grow using blood or plasma as its sole source of food
d. it can be transmitted from one human to another
e. it makes humans sick

2. Once a bacterium had been taken up into a phagocyte and enclosed in a vessicle, it is likely that

a. it is then coated with antibodies to target it for destruction
b. it is digested by digestive enzymes poured into the vessicle from a lysozome
c. it fuses with the cell membrane of the phagocyte and kills it
d. it dies because of the high temperature inside the phagocyte
e. it secretes a white substance that we know as “pus.”

3. When did bacteria appear on earth?

a. very soon after humans evolved
b. very soon after warm-blooded animals evolved
c. about the same time as the dinosaurs
d. only after human populations gathered in large groups (i.e. cities)
e. before all other forms of life

4. A normal, healthy human being

a. carries no bacteria at all (is sterile from a bacteriological point of view)
b. carries some bacteria, but only non-pathogenic ones
c. carries some bacteria, bot only pathogenic ones
d. carries a mix of pathogenic and non-pathogenic bacteria and would be sicker of they were all removed
e. carries a mix of pathogenic and non-pathogenic bacteria and would be even healthier if they were all removed

5. Most bacteria

a. cause disease
b. can live in or on humans
c. are too small to be seen without a microscope
d. are multicellular organisms
e. can grow in boiling acid for extended times