micro exam 2

Process of denitrification involves transformation of

biofilms..

Eutrophication is process of ...

acquired immunity refers to type of specific immunity that

vaccination is a good example of

most antibiotics are produced by

all the following conditions ocntribute to growth of microorganisms in foods:

denitrificaiton is the conversion of..

ruminants rely on microbes for breakdown of

example of successfull genetically engineered vaccine is one for..

whcih of following not an example of food of microbial origin?

traditionally beer is made by yeast fermentation of

toxins produced by Aspergillus flavus and Claviceps purpurea both contribute to ...

poultry products are especially susceptible to contamination by

Recalcitrant compounds are ______ resistant to microbial degradation than those that are not recalcitrate

toxin of Bacillus thuringiensis affects catepillars by...

all of following release CO₂ into the atmosphere:

organisms of botulism, tetanus and diphtheria are distinguished by

epidemic disease is one that...

Pseudomonas aeruginosa is a soil organism. every time we eat fresh salad, consume millions of these organisms. they usually do no harm. however, same organisms can cause serious infection in people who have been severely burned. such pathogen is called..

DNA vaccines consist of:

certain microrganisms inhabit parts of the body without casuing symptoms of disease, organisms referred as

Rubor, calor, tumor, and dolar are

True or false:
natural barrier to intestine is provided by extremely alkaline environment of stomach
True False

true/false: fever is an abnormally high body temperature that may provide a specific mechanism of body defense.
True False

true/false: most antigens are large, complex molecules that are not normally present in body
True False

true/false
in carbon cycle, most carbon is release from dead organic matter as carbon dioxide which reenters the atmosphere
True False

true/false
nitrification is the conversion of ammonia to nitrite ions, followed by conversion of nitrite to nitrate
True False

true/false
sauerkraut is made from fermentation of shredded cabbage
True False

true/false:
sake is made from fermentation of soybeans
True False

true/false:
freezing is an effective way of killing all mmicroorganisms within a food product and ensuring its sterility
True False

true/false:
chemical physical properties of food that bear on the type of possible contamination include the amt of water present, pH and physical structure of food.
True False

true/ false:
foodborne infections include typhoid fever, diphtheria, brucellosis, and Rocky Mtn spotted fever.
True False

true/false:
one of major fears about use of recombinant DNA technology is that ecosystem disruption could result from environmental release of genetically engineered organisms.
True False

true/false:
use of modern molecular techniques has provided a mechanism for growing the microorganisms previously reffered to as unculturable
True False

true/false:
Agrobacterium has ability to infect plants and prouce tumor-like growths
True False

true/false:
microorganisms in water can utilize oxygen faster than it can be redissolved if enoguh nutrients are available
True False

true/false
low-nutrient, oligotrophic waters will usually become stratified and have an anerobic hypolimnion at a certain times of the year
True False

true/false:
epilimnion of a lake is located below hypolimnion.
True False

false/ true:
living microorganisms found in soils and water are generally capable of growth on common lab. media
True False

this can be ripened wit hvarious molds

production starts with the curdling of casein

commonly made by yeasts in grape juice

made w. addition of 3% salt

excellent source of vitamin C

made with yeast added to four and water