36. Bacteria are classified based on their response to stains. Which of the following is NOT a common stain used in bacterial classification?
a) crystal violet
b) Gram stain
c) safranin
d) eosin
37. Bacteria that can live and thrive in the absence of oxygen are known as:
a) aerobic bacteria
b) anaerobic bacteria
c) facultative anaerobes
d) microaerophiles
38. The study of bacteria is called:
a) bacteriology
b) virology
c) microbiology
d) mycology
39. Bacterial infections can be prevented by practicing good hygiene and:
a) using antibiotics regularly
b) avoiding vaccination
c) avoiding contact with animals
d) washing hands frequently
40. Bacteria that require an external source of organic compounds for growth are known as:
a) heterotrophs
b) autotrophs
c) phototrophs
d) parasitic
