Food Tests + Functions of Them

Question 1

Food test for glucose

Answer 1

Benedict’s solution in water bath at 80 degrees for 5 mins

Blue to brick red

Question 2

Food test for proteins

Answer 2

Biuret solution

Blue to mauve

Question 3

Food test for starch

Answer 3

Few drops of iodine

Orange to blue/black

Question 4

Food test for lipids

Answer 4

Add ethanol and shake to remove lipids in alcohol

Colourless to cloudy white

Question 5

What are lipids made up of

Answer 5

Carbon hydrogen and oxygen

Question 6

What are proteins made up of

Answer 6

Carbon hydrogen oxygen and nitrogen

Question 7

What is glucose made up of

Answer 7

Carbon oxygen and hydrogen

Question 8

What are carbohydrates made up of

Answer 8

Carbon hydrogen and oxygen

Question 9

Functions of proteins

Answer 9

Enzymes, hormones, structural molecules, growth and repair of tissue

Question 10

Functions of lipids

Answer 10

Thermal and electrical insulation and energy storage

Question 11

Function of carbohydrates

Answer 11

Broken down in respiration,

Question 12

Structure of carbohydrates

Answer 12

Made up of simple sugars like fructose and glucose which are formed to make complex carbs such as starch and glycogen

Question 13

Structure of lipids

Answer 13

Made up of 3 fatty acids and a glycerol

Question 14

Structure of proteins

Answer 14

Made up of a lot of amino acids joined together

Question 15

Function and deficiency of iron

Answer 15

Function= forms part of haemoglobin that binds to oxygen

Deficiency= anaemia

Question 16

Function and deficiency of Calcium

Answer 16

Function= needed to form bones and teeth

Deficiency= rickets

Question 17

Vitamin A function and deficiency

Answer 17

Function= making chemical in retina and protecting surface of eye

Deficiency= night blindness

Question 18

Function and deficiency of vitamin C

Answer 18

Function= needed for cells and tissues to stick together

Deficiency= scurvy

Question 19

Vitamin D deficiency and function

Answer 19

Function= needed to absorb calcium and phosphate ions from food

Deficiency= rickets

Question 20

Why is water needed in our diet

Answer 20

Essential solvent, transport, temperature regulation

Question 21

Why is fibre needed in our diet

Answer 21

Helps the movement of food in our intestines and therefore reduces risk of constipation