Unit One

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Why do athletes eat foods with a low GI before an event?
Because hat will provide them with energy right the way through the competition
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Why might someone find the glycaemic load more useful than the glycaemic index?
Because the glycaemic load is based upon how much of the food you actually eat rather than 50g of carbohydrate.
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Describe the role of gut bacteria.
Help the body break down some indigestible carbohydrate molecules, They prevent the growth of harmful bacteria in the gut, Some produce helpful vitamins E.G Vitamin K.
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Explain why many processed foods are considered unhealthy.
Because they contain high levels of salt and fat which we are advised to only have small amounts, also, they don't contain many vitamins and minerals which are vital for a healthy, balanced diet.
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What is obesity?
When you consume more calories than you burn off, meaning you have a BMI of 30+.
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What is diabetes?
When the body can't regulate the amount of glucose in the blood properly.
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What 2 units do food labels use to show the energy content of foods?
Kcal - Calories and KJ - Kilojoules
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Suggest why the traffic light system can be more useful than food tables.
Stand out, eye-catching and easier to follow.
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Why could eating foods which are high in salt be bad for you?
Because it can increase blood pressure which ultimately increases the risk of heart disease.
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Name the Monomers which make up Carbohydrates.
Monosaccharides
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Name the monomers which make up proteins.
Amino acids
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Name 3 polysaccharides of glucose.
Starch, Glycogen and Cellulose.
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What type of reaction joins together 2 carbohydrate monomers?
Condensation.
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What is a hydrolysis reaction?
A reaction which breaks down compounds using water.
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What are the conditions in the gut which allow most digestive enzymes to work?
37 degrees, acidic conditions (pepsin) alkaline conditions in the small intestine (other enzymes )
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How is the Rf value of a chemical calculated?
distance travelled by the spot / distance travelled by the solvent.
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What is an enzyme?
Biological catalyst.
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What is the name given to the amount of energy needed for a reaction to take place?
Activation energy.
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What is an enzyme-substrate complex?
When the substrate is complementary to the enzyme's active site.
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Other cards in this set

Card 2

Front

Why might someone find the glycaemic load more useful than the glycaemic index?

Back

Because the glycaemic load is based upon how much of the food you actually eat rather than 50g of carbohydrate.

Card 3

Front

Describe the role of gut bacteria.

Back

Preview of the front of card 3

Card 4

Front

Explain why many processed foods are considered unhealthy.

Back

Preview of the front of card 4

Card 5

Front

What is obesity?

Back

Preview of the front of card 5
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