Normal bacterial inhabitants of the human body
a. are naturally resistant to antibiotics.
b. are able to out-compete some invading
pathogens and thus are one of the body’s initial
defense mechanisms.
c. can be transformed into pathogenic forms if a
person’s resistance to disease is low.
d. are unable to survive the human body’s defense
mechanisms.
e. are able to out-compete some invading
pathogens and thus are part of the body’s innate
immunity.
Answer: b
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Answer the following statement true (T) or false (F)
Which enzyme converts ATP to cyclic AMP?
a. lactic dehydrogenase b. creatine phosphokinase c. pancreatic nucleotidase d. adenylate cyclase e. monoamine oxidase
Alkalinophiles can survive in water up to pH (11.5/10/7.0).
Fill in the blank(s) with the appropriate word(s).
Food infections have incubation periods of days to weeks, whereas the incubation period for food intoxications is hours to days. Please select the true statements that explain this situation.
> In food infections, the microorganism has to grow in the infected human host, producing more toxins as it reproduces. > The elements that cause food intoxications, like arsenic and mercury, are extremely potent in tiny amounts causing a faster disease symptomology. > The gram-positive bacteria, the organisms causing food intoxications, grow much faster than gram-negative bacteria, the organisms causing food infections. > Food intoxications involve the ingestion of exotoxins produced by microorganisms in the food whereas food infections involve the ingestion of the microbial cells themselves.