16. Which of the following bacteria is responsible for causing food poisoning?
a) Escherichia coli
b) Streptococcus pneumoniae
c) Staphylococcus aureus
d) Shigella dysenteriae
17. The process of bacteria taking up free DNA from their environment is called:
a) conjugation
b) transformation
c) transduction
d) binary fission
18. Which of the following is an example of gram-negative bacteria?
a) Staphylococcus aureus
b) Escherichia coli
c) Streptococcus pneumoniae
d) Bacillus subtilis
19. Bacteria that require salt for growth are known as:
a) methanogens
b) halophiles
c) thermophiles
d) psychrophiles
20. Bacterial toxins are responsible for causing symptoms in various diseases. Which of the following diseases is caused by a bacterial toxin?
a) tetanus
b) tuberculosis
c) pneumonia
d) Lyme disease
