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5424770
Biology - Human Nutrition
Descrição
GCSE General (Biology ) Mapa Mental sobre Biology - Human Nutrition, criado por Hana Noor-Khan em 14-05-2016.
Sem etiquetas
general
biology
gcse
Mapa Mental por
Hana Noor-Khan
, atualizado more than 1 year ago
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Criado por
Hana Noor-Khan
mais de 8 anos atrás
8
2
0
Resumo de Recurso
Biology - Human Nutrition
Carbohydrates
Supply the energy in cells
Made from carbon, hydrogen and oxygen
Potatoes, wheat and rice are starchy foods
Storage of carbohydrates in animals is glycogen
Cellulose is carbohydrate storage for plants in the cell wall
Glucose is the the sugar for animals
Is needed for energy
Tests of glucose
1) Add Benedicts solution to glucose
2) Put test tube in boiling water
3) if glucose present will turn green --> yellow --> orange
Testing for starch
1) Put starch solution into a test tube
2) Add iodine
3) If starch present will turn from blue --> black
Lipids
Contain carbon, hydrogen and oxygen
Made from glycerol and fatty acids
Is needed for energy and insulation
Too much fat can cause cholesterol
Butter and oily fish contain a lot of fat
Testing for fat
1) Put fat solution into a beaker
2) Add 2cm cubed of cooking oil
3) Shake
4) Add 2 cm cubed of water
5) Shake
Proteins
Contain carbon, hydrogen, oxygen and nitrogen
Needed for growth and repair
Meat, fish and cheese are high in protein
Proteins are made up of long chains of amino acids
There are around 20 different types of amino acids in the body
Testing for protein
1) Add copper sulphate to the protein solution
2) Mix and add sodium hydroxide
3) If protein present will turn lilac
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