MILK AND MILK PRODUCTS QUIZ

all of these

P. fragi

Alcaligenes metalcaligenes

Pseudomonas

thickening caused by micrococci

gas formation by sucrose fermenting yeasts

mold colonies growing on the surface

All of these

Streptococcus lactis

Streptococcus thermophilus

S. cremoris

Lactobacillus bulgaricus

slimy capsular material from the cells usually proteins

slimy capsular material from the cells usually lipids

All of these

slimy capsular material from the cells usually gums or mucins

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

sliminess resulting from the thickness of the cream

stringiness due to thin films of casein or lactalbumin during cooling

All of these

gas forming, anaerobic spore formers

gas forming, aerobic spore formers

none of these

both (a) and (b)

Pseudomonas synxantha

Aeromonas hydrophila

none of these

Pseudomonas syncyanea

Pseudomonas putrefaciens

S. marcescens

both (a) and (b)

the enzymatic oxidation of tyrosine by P. fluorescens

Lactobacillus bulgaricus

Streptococcus thermophilus

mixed culture of (a) and (b)

S. cremoris

pink color

black smudge

greenish areas

none of these