C3

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An example of a carbohydrate polymer is:
cellulose.
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Which elements are present in carbohydrates?
carbon, oxygen, hydrogen
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Elements such as carbon and nitrogen are cycled in the natural world. Where do animals get these elements from?
plants
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Which organisms return elements in dead animals and plants back into the soil and air?
Decomposers
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Which of these increases the nitrogen compounds in soil?
lightning
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Which organisms break down nitrogen compounds in soil?
Denitrifying bacteria
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Which is the most important chemical element that plants obtain from the soil?
Nitrogen
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In intensive farming, what is used to put back this element?
synthetic fertiliser
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In organic farming, what is used to put back this element?
manure
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Organic farmers may also grow leguminous plants as a crop every few years. What is the name of this technique to put an essential nutrient back into the soil?
crop rotation
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Scientific reseach and applications are controlled by:
laws and regulations
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People on low incomes may benefit from intensive farming because it produced food that is:
cheap
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Some people believe that intensive farming is bad because it uses:
pesticides
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Some people buy organically grown food because they think it is:
healthy
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People on low incomes may not buy organically grown food because it is:
expensive
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Intensive farming may be less sustainable than organic farming because it uses:
synthetic fertiliser
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Many people are against the use of genetically modified crops because they think that they may:
damage the environment.
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Preservatives are added to food to:
prolong shelf life
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Anti-oxidants are added to food to:
prevent "off" flavours.
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Emulsifiers and stabilisers are added to food to:
stop ingredients separating
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An additive that has passed an EU safety test is given an:
E number.
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Some food additives may cause:
hyperactivity in children.
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Some plants naturally produce poisonous chemicals called:
toxins
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Some people get ill if they eat peanuts or gluten in wheat. This is because they have an:
allergy.
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What organism may produce poisonous chemicals as it grows on stored food?
mould
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What chemicals used by farmers may contaminate food made from their crops?
Pesticides
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The chemical residues allowed in foods are controlled by:
EU laws
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What is the Food Standards Agency?
an independent food safety watchdog
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How was the Food Standards Agency set up?
The Food Standards Agency was set up by an Act of Parliament.
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By law the information on food labels must be:
true
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What do food labels tell people?
what is in the food
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What information can tell us about the size of a risk?
data
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What is the benefit of using aspartame instead of sugar?
less likely to cause obesity
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What is the risk of using aspartame instead of sugar?
may cause cancer
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Many people consider aspartame safe to use because it has been:
officially approved
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What phrase sums up the preacutionaly principle?
better safe than sorry
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Digestion breaks down natural polymers into compound that are:
more soluble
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During digestion starch is broken down into:
glucose
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During digestion protein is broken down into:
amino acids.
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Excess amino acids are broken down in the liver to form:
urea
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The breakdown produce of excess amino acids is excreted by the:
kidneys
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Some processed foods may cause a rapid rise in blood sugar level because they contain high levels of:
sugar.
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In Type 1 diabetes the pancreas stops making:
insulin
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Type 2 diabetes usaully develops:
later in life
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Type 1 diabetes can be controlled by:
insulin injections
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Type 2 diabetes can be controlled by:
diet and exercise.
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Why may some people eat unhealthily despite the risks of eating this way?
because they enjoy fast food.
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If everyone ate healthily fewer people would get diabetes. Why would this benefit society?
it would reduce medical costs.
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What information is required for a person to make a choice of whether to accept the risk associated with a particular activity?
both chance and consequences
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Other cards in this set

Card 2

Front

Which elements are present in carbohydrates?

Back

carbon, oxygen, hydrogen

Card 3

Front

Elements such as carbon and nitrogen are cycled in the natural world. Where do animals get these elements from?

Back

Preview of the front of card 3

Card 4

Front

Which organisms return elements in dead animals and plants back into the soil and air?

Back

Preview of the front of card 4

Card 5

Front

Which of these increases the nitrogen compounds in soil?

Back

Preview of the front of card 5
View more cards

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