water and milk

Question 1

As the pH falls charge on____falls and it precipitates

Answer 1

casein

Question 2

casein also found in____proteins

Answer 2

whey

Question 3

whey protein forms a complex with_____when milk is heated

Answer 3

K-casein

Question 4

denaturation of______causes cooked flabour of heated milk

Answer 4

B-lactoglobulin

Question 5

yeasts,molds and a broad spectrum of bacteria can grow in milk, particularly tempuratures over____

Answer 5

16 celsius

Question 6

once microorganisms get into milk what happens their number ?

Answer 6

increase rapidly

Question 7

which one is easier exclude microorganims or controlling microbial growth for milk ?

Answer 7

1st option

Question 8

brucella bacteria is____in milk

Answer 8

pathogenic

Question 9

staphylococcus aureus bacteria is_____in milk

Answer 9

pathogenic

Question 10

pathogenic bacterias in milk?

Answer 10

streptococcus
brucella
staphylococcus aureus
S. agalactiae
mycobacterium tuberculosis

Question 11

initial bacterial count of milk may range from less than_____cells/ml to___

Answer 11

1000 to 106

Question 12

In pasteurization, milk is heated to a tempurature which ?

Answer 12

sufficient to kill bacteria but its below boiling point

Question 13

pasteurization has effects on_____value of milk

Answer 13

nutritive

Question 14

In pasteurization major nutrients are not____

Answer 14

altered

Question 15

In pasteurization, there is some loss of _____vitamins

Answer 15

c and b group vitamins

Question 16

In milk, antebiotics are used to treat ?

Answer 16

mastitis Infections

Question 17

milk containing antibiotic resiudes is not suitable for_____consumption

Answer 17

human

Question 18

most important bacteria in fecal contamination of milk

Answer 18

salmonella

Question 19

masitits of cow caused by 4 important bacterias which are

Answer 19

staphylococcus areus
GBS
E.cou
GCS

Question 20

what are the mictobiological control tests for milk ?

Answer 20

methylene blue reduction and phosphate tests
standard plate count
coliform plate count

Question 21

colony count test used for___milk
count must be smaller than___cells/ml at 30 celsius

Answer 21

UHT
100

Question 22

salmonella typhi, shigella species are_____bacterias

Answer 22

opportunistic

Question 23

animal originated ınfections in milk ?

Answer 23

brucella species
bovine tuberculosis
campylobacter species

Question 24

human originated pathogenes ?

Answer 24

salmonella typhi
streptococcus pyogenes
corynebacterium diphtheriae

Question 25

less common pathogenes in milk

Answer 25

listeria monocytogenes mycotoxins(alfatoxin) yersinia enterocolitica corynebacterium ulcerans

Question 26

mycotoxins occurs when water are contamined with

Answer 26

molds which can be contaminated from animal feed, silage

Question 27

natural water bacterias ?

Answer 27

micrococcus serratia acinetobacter flavobacterium

Question 28

soil bacterias ?

Answer 28

B. subtilis E. aerogenes E. cloacae aspergillus(mold)

Question 29

sewage bacterias?

Answer 29

salmonella typhi vibrio cholera shigella E. coli enterobacter faecalis C. perfrigens

Question 30

Important bacterial gastrointestinal diseases transmitted through water are

Answer 30

cholera salmonellosis and shigellosis

Question 31

presence of pathogenic bacteria in water is____&____

Answer 31

sporadic and erratic

Question 32

microbiological tests for water?

Answer 32

coliform count tests examination of human fecal enterococci

Question 33

conciliation of 2 needs was met by discovery and testing of______bacteria

Answer 33

Indicator bacteria

Question 34

aeromicrobiology is study of_____

Answer 34

microorganisms and toxins found in air

Question 35

particles suspended in air called____

Answer 35

aerosols

Question 36

airborne biological materials are known as

Answer 36

bioaerosols

Question 37

bioaerosols are slightly bigger than ?

Answer 37

viruses

Question 38

atmosphere is an inhospitable for microorganisms mainly because of____stress

Answer 38

desiccation stress

Question 39

desiccation stres results in limited time phase in which microbes can remain___

Answer 39

biologically active

Question 40

Many microorganisms have specific mechnanisms that allow them to be resistant to_________

Answer 40

various environmental factors

Question 41

______,_______,_______,_______All have specific mechanisms that protect them from harsh gaseous environments, increasing their ability to survive aerosolization

Answer 41

spore-forming bacteria,molds, fungi and cyst-forming protozoa

Question 42

Survival in aerosols for organisms that have no_______can be ofthen measured in seconds

Answer 42

specific mechanisms

Question 43

Organisms with no specific mechanisms can survive______

Answer 43

Indefinitely

Question 44

Factors affecting microbial viability ?

Answer 44

humidity temperature radiation oxygen,open air factors(OAFs)and ions pressure

Question 45

Impo viruses for air ?

Answer 45

ınfluenza virus A(H1N1) avian influenza rubella SARS and SARS-CoV-2 rhinovirus varicella zoster

Question 46

Impo bacteria for air ?

Answer 46

mycobacterium tuberculosis bacilius anthrocis streptococcus pneumonior

Question 47

Impo fungus for air

Answer 47

aspergillus penicillium cladosporium stachybotrys fusarium cryptostroma biostomyces dermatitidis