1. All microorganisms are best defined as organisms that
a.) cause human disease
b.) lack a cell nucleus
c.) are infectious particles
d.) are too
... [Show More] small to be seen with the unaided eye
e.) can only be found growing in labs
- d.) are too small to be seen with the unaided eye
2. cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called
a.) decomposers
b.) prokaryotes
c.) pathogens
d.) eukaryotes
e.) fermenters
- b.) prokaryotes
3. which of the following is a unique characteristic of viruses that distinguishes them from the other major groups of microorganisms?
a.) cause human disease
b.) lack a nucleus
c.) cannot be seen without a microscope
d.) contain genetic material
e.) lack cell structure
- b.) lack a nucleus
4. disease-causing microorganisms are called
a.) decomposers
b.) prokaryotes
c.) pathogens
d.) eukaryotes
e.) fermenters
- c.) pathogens
5. helminths are
a.) bacteria
b.) protozoa
c.) molds
d.) parasitic worms
e.) infectious particles
- d.) parasitic worms
6. which of the following is a scientific name?
a.) gram-positive streptococcus
b.) staph
c.) Streptococcus pyrogenes (italicized)
- c.) Streptococcus pyrogenes (italicized)
7. when assigning a scientific name to an organism
a.) the species name is capitalized
b.) the species name is placed first
c.) the species name can be abbreviated
d.) both genus and species names are capitalized
e.) both genus and species names are italicized or underlined
- e.) both genus and species names are italicized or underlined
8. the two functions of bacterial appendages are
a.) attachment and protection
b.) attachment and motility
c.) motility and slime production
d.) energy reactions and synthesis
e.) protection and motility
- b.) attachment and motility
9. the term that refers to the presence of flagella over the cell surface is
a.) amphitrichous
b.) atrichous
c.) lophotrichous
d.) monotrichous
e.) peritrichous
- e.) peritrichous
10. chemotaxis refers to the ability to
a.) move in response to light
b.) move in response to a chemical
c.) not move in response to a chemical
d.) transport desired molecules into cells
- b.) move in response to a chemical
11. Peptidoglycan is a unique macromolecule found in bacterial
a.) cell walls
b.) cell membranes
c.) capsules
d.) slime layers
e.) inclusions
- a.) cell walls
12. a bacterial cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is
a.) gram-negative
b.) gram-positive
- b.) gram-positive
13. a bacterial genus that has waxy mycolic acid in the cell walls is
a.) myobacterium
b.) mycoplasma
c.) strep
- a.) myobacterium
14. All of the following structures contribute to the ability of pathogenic bacteria to cause disease except the
a.) inclusion bodies
b.) fimbrae
c.) capsule
d.) slime layer
e.) LPS
- a.) inclusion bodies
15. a chain of rod-shaped cells would be called an
a.) streptobacillus
b.) staphylobacillus
c.) streptococcus
d.) staphylococcus
- a.) streptobacillus
16. lipopolysaccharide is an important cell envelope component of
a.) gram-negative bacteria
b.) gram-positive bacteria
c.) acid-fast bacteria
d.) mycoplasmas
- a.) gram-negative bacteria
17. rods that are slightly curved are called
a.) vibrio
b.) spirochetes
c.) coccobacilli
d.) filaments
- a.) vibrio
18. the presence of variation in the size and shape of bacterial cells of the same species is known as
a.) pleomorphism
b.) chemotaxis
c.) pseudomorphology
d.) sarcina
- a.) pleomorphism
19. protists include
a.) yeast and molds
b.) algae and protozoa
c.) helminths
d.) bacteria
e.) viruses - b.) algae and protozoa
20. Microbes that live stably in and on the human body are called the
a.) transient microbiota
b.) human microbiome
c.) pathogenic microorganisms
d.) virulent microorganism
e.) opportunistic microbiota - b.) human microbiome [Show Less]