(c) Obligate anaerobes
(d) Free radicals- What microorganisms do not use oxygen and can actually be harmed by it?
(a) Obligate aerobes
(b) Facultative anaerobes
(c) Obligate anaerobes
(d) Free radicals - What is not a toxic form of oxygen?
(a) Singlet oxygen
(b) Facultative oxygen
(c) Superoxide free radicals
(d) Hydroxyl radical - What is a sterile culture medium?
(a) A hydroxyl radical medium
(b) A medium containing no living organisms
(c) A chemically defined medium
(d) A moisture-filled medium - What must chemically defined media contain?
(a) Growth factors
(b) Complex media
(c) Peptone complex
(d) Protein hydrolysis - What is agar?
(a) A nutrient
(b) Vitamins
(c) A solidifying agent
(d) Broth - What is an enrichment culture?
(a) Something that provides growth for all microorganisms
(b) Something that inhibits growth for all microorganisms
(c) An infectious culture
(d) Something that provides growth for a certain microorganism but not
for others
CHAPTER 6 Microbial Growth and Controlling It^117