Milk and Milk Products
Bacterial ropiness in milk is caused by

slimy capsular material from the cells usually lipids
slimy capsular material from the cells usually proteins
All of these
slimy capsular material from the cells usually gums or mucins

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Milk and Milk Products
The acidity may be described as "aromatic" when

appreciable amounts of volatile fatty acids are produced by Coliform bacteria
Lactic streptococci and aroma forming Leuconostoc species are growing together
All of these
Streptococcus lactis and other lactis are growing together

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Milk and Milk Products
Non bacterial ropiness or sliminess in milk and milk products may be due to the

stringiness due to thin films of casein or lactalbumin during cooling
sliminess resulting from the thickness of the cream
All of these
stringiness caused by mastitis and in particular by fibrin and leucocytes from the cow's blood.

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