MICRO BIO 210: EXAM 2 CLICKER
QUESTIONS AND ANSWERS 100%
CORRECT.
which of the following nutrients is usually only needed in small amounts by
microorganisms as an enzyme cofactor? - ANSWERiron
which of these terms describes microbes that do not use oxygen but can grow if it is
present - ANSWERaerotolerant anaerobe
Blood agar is an example of __________ medium? - ANSWERdifferential
a culture in inoculated with 10 cells. how many cells are in the culture after 6
generations? - ANSWER640
which growth phase is also called exponential growth phase? - ANSWERlog phase
the agar that is added to culture media serves as: - ANSWERsolidifying agent
organisms such as clostridium that lack oxygen- detoxifying enzymes and will die in the
presence of oxygen are? - ANSWERobligate anaerobes
sugar and salts are used to preserve foods because they? - ANSWERcause
plasmolysis of cells
the removal or destruction of all life forms is? - ANSWERsterilization
heat sensitive solution such as vaccines or antibiotics should be sterilized with? -
ANSWERfiltration
for commercial sterilization of canned goods is most important to kill - ANSWERall
clostridium endospores
which of these treatments is bactericidal? - ANSWERionizing radiation
all bacteria require all of the following chemicals for growth except: - ANSWERoxygen
staph aureus is capable growth on nutrients agar containing 10% salt (high
concentration). This medium is aran? - ANSWERselective medium
which of these terms describes a microorganism that thrives at human body temp (37
C)? - ANSWERmesophile
QUESTIONS AND ANSWERS 100%
CORRECT.
which of the following nutrients is usually only needed in small amounts by
microorganisms as an enzyme cofactor? - ANSWERiron
which of these terms describes microbes that do not use oxygen but can grow if it is
present - ANSWERaerotolerant anaerobe
Blood agar is an example of __________ medium? - ANSWERdifferential
a culture in inoculated with 10 cells. how many cells are in the culture after 6
generations? - ANSWER640
which growth phase is also called exponential growth phase? - ANSWERlog phase
the agar that is added to culture media serves as: - ANSWERsolidifying agent
organisms such as clostridium that lack oxygen- detoxifying enzymes and will die in the
presence of oxygen are? - ANSWERobligate anaerobes
sugar and salts are used to preserve foods because they? - ANSWERcause
plasmolysis of cells
the removal or destruction of all life forms is? - ANSWERsterilization
heat sensitive solution such as vaccines or antibiotics should be sterilized with? -
ANSWERfiltration
for commercial sterilization of canned goods is most important to kill - ANSWERall
clostridium endospores
which of these treatments is bactericidal? - ANSWERionizing radiation
all bacteria require all of the following chemicals for growth except: - ANSWERoxygen
staph aureus is capable growth on nutrients agar containing 10% salt (high
concentration). This medium is aran? - ANSWERselective medium
which of these terms describes a microorganism that thrives at human body temp (37
C)? - ANSWERmesophile
