C1a

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  • Created by: drewey999
  • Created on: 16-05-16 19:06
Why do we cook food
Flavour, kills microbes, changes the texture and makes it easier to digest.
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What happens to proteins when they're denatured
The weak bonds of intermolecular forces are broken and the protein unravels
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What is different about a cooked potato to a raw one?
Their colour, texture: softer when cooked and their taste: some starch turns to enzymes so they are sweeter
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REMINDER! What do plant cells have especially?
A cell wall and vacuoles
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What is a potatoes' cell wall made of? Why is it important?
It is made of cellulose which is something we can't digest (also called fibre) It is broken into smaller molecules when heated, making them easier to digest
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Why is the potato then easier to digest?
The cell walls rupture making them lose their rigid structure and a softer texture. Also the starch grains swell up and spread out
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How was food preserved in the past?
Via salting it, drying it or smoking it.
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What is the additive that makes a food keep for longer?
Preservative
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What stops oxygen reacting with food
Antioxidants
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What makes food look appealing
Colourings
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What keeps ingredients mixed?
Emusifiers
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What improves the taste of food?
Flavourings
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EMUSIFIERS TOPIC!
EMULSIFIERS TOPIC!
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What is the keyword for two liquids that mix?
Misable e.g ribena
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What is the keyword for two liquids that dont mix?
Immisable e.g oil and water
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What is a mixture made from two or more immisable liquids called?
Emulsion e.g paints, mayonaise
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Examples of Emulsions?
Paints, ice cream, sun cream, milk, mayonaise
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What is the hydrophobic end?
Water hating, sits in oil
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What is the hydrophilic end?
Loves water, hates oil, sits in water.
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What do these result in?
The two being held close together
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DISSOLVING!
DISSOLVING!
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What are substances that can't dissolve called?
Insoluble
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What do substances that can dissolve make?
A mixture, mixes completely with a liquid.
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Name the S words for dissolving
Soluble: substances that can dissolve. Solution: the mixture formed when a substance dissolves. Solute: a solid that dissolves. Solvent: a liquid that can dissolve a substance. Saturated: no more solute can dissolve-saturated solution.
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FInal S word?
Solubility: the amount of solute that can dissolve in a litre of solvent
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Other cards in this set

Card 2

Front

What happens to proteins when they're denatured

Back

The weak bonds of intermolecular forces are broken and the protein unravels

Card 3

Front

What is different about a cooked potato to a raw one?

Back

Preview of the front of card 3

Card 4

Front

REMINDER! What do plant cells have especially?

Back

Preview of the front of card 4

Card 5

Front

What is a potatoes' cell wall made of? Why is it important?

Back

Preview of the front of card 5
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