MILK AND MILK PRODUCTS QUIZ

worse at the bottom of the milk

worse at the middle of the milk

worse near the top of the milk

all of these

P. fragi

P. mephitica

Pseudomonas synxantha

Aeromonas hydrophila

mixed culture of (a) and (b)

Streptococcus thermophilus

S. cremoris

Lactobacillus bulgaricus

none of these

both (a) and (b)

putridity

rabbito

thickening caused by micrococci

mold colonies growing on the surface

gas formation by sucrose fermenting yeasts

All of these

acid flavor

burnt or caramel flavor

none of these

bitter flavor

black smudge

none of these

pink color

greenish areas

stringiness due to thin films of casein or lactalbumin during cooling

sliminess resulting from the thickness of the cream

stringiness caused by mastitis and in particular by fibrin and leucocytes from the cow's blood.

All of these

Clostridium sporogenes

Clostridium tyrobutyricum

None of these

Clostridium herbarum

Streptococcus lactis and other lactis are growing together

Lactic streptococci and aroma forming Leuconostoc species are growing together

All of these

appreciable amounts of volatile fatty acids are produced by Coliform bacteria