Xmas Exam Flashcards
What are enzymes
Enzymes are are chemicals that help fruit to ripen but after the food is ripe they make to fruit rot.
What causes food to spoil
Enzymes, microorganisms, mould yeast and bacteria.
What are microorganisms (5)
They are tiny plants of animals. They cause the food to breakdown, rot, go sour,make it discolour and become slimy or sticky.
What is mould
Mould grows on food and looks like cotton. It damages the appearance and taste
What does mould need to grow, and what can kill it.
It needs heat, moisture but can be killed by sunlight
What is yeast and what is it used for
Yeast grows on sugary foods it affects the taste and look. It’s is used in bread making as it contains vitamins
What is bacteria used for making
Cheese, yogurt and vinegar
What are the five things that micro organisms need to grow
Food moisture warmth time oxygen
What kind of foods does bacteria like to grow on and give give the 4 examples
High protein/// eggs meat poultry and dairy products
What is the ideal temperature for bacteria to grow
45-50oC
What kills bacteria
By boiling it
What pauses its growth
Freezing
What kind of conditions and foods does bacteria like
Damp and moist
What happens when all the conditions are present
The bacteria can double every 10-20 mins
List the 5 ways that food can become infected
Humans insects vermin cross contaminant dirty utensils
