Food

Question 1

What is the chemical formula for lipids?

Answer 1

CHO (no ratio)

Question 2

Name a structural role of lipids.

Answer 2

Cell Membranes

Question 3

Name a Metabolic role of lipids

Answer 3

Energy Source

Question 4

What is the difference between fats and oils?

Answer 4

Fats are solid at room temperature.
Oils are liquid at room temperature.

Question 5

What is the test for lipids?

Answer 5

Brown paper (translucent spot)

Question 6

What is the structure of lipids?

Answer 6

Triglyceride (made up of glycerol and 3 fatty acids)

Question 7

What is the structure of phospholipids (found in cell membranes)

Answer 7

Glycerol, 2 fatty acids and 1 phosphate

Question 8

What chemicals make up proteins?

Answer 8

C, H, O, N, S

Question 9

Describe the physical appearance of proteins (give examples)

Answer 9

Globular (egg whites, enzymes)
Fibrous (Keratin (hair, nails))

Question 10

As proteins cannot be stored, in what part of the digestive system are they broken down in?

Answer 10

The Liver

Question 11

What is the structure of proteins?

Answer 11

Made up of peptides (small chains)
polypeptides (long chains)
20 (+) amino acids

Question 12

What is the test for proteins?

Answer 12

Biurets solution (blue-purple)

Question 13

What is the metabolic role of proteins?

Answer 13

Enzymes

Question 14

What is the structural role of proteins?

Answer 14

Keratin

Question 15

What is the function of water?

Answer 15

Transport, split in photosynthesis, component of cell (shape), good absorber of heat from chemical reactions)

Question 16

How much water makes up human mass?

Answer 16

60%

Question 17

How much water makes up cell mass?

Answer 17

90%

Question 18

Name two trace elements

Answer 18

Cobalt and zinc

Question 19

Are trace elements required in large or small amounts?

Answer 19

Small amounts

Question 20

Name two other trace elements found in dissolved salts.

Answer 20

Sodium and potassium

Question 21

What are the two types of vitamins?

Answer 21

Water soluble and Fat soluble

Question 22

Give an example of a fat soluble vitamin.

Answer 22

Vitamin D (prevents rickets in children)

Question 23

Give an example of a water soluble vitamin.

Answer 23

Vitamin C (prevents scurvy)

Question 24

Name two minerals found in plants.

Answer 24

Calcium (cell walls)
Magnesium (chlorophyll component)

Question 25

Name two minerals found in animals.

Answer 25

Iron (part of haemoglobin, prevents anaemia) Calcium (strong bones, teeth)

Question 26

Name one function of carbohydrates

Answer 26

Energy

Question 27

What are the three structures of carbohydrates?

Answer 27

Monosaccharide (1 sugar unit) - eg. glucose Disaccharide (2 sugar units) - eg. sucrose Polysaccharide (chain of sugar units) - eg. glycogen (animals) cellulose (plants (cell wall)) starch (plants (storage))

Question 28

What is the chemical formula of carbohydrates?

Answer 28

C6(H20)6

Question 29

What is the ratio of hydrogen to oxygen in carbohydrates?

Answer 29

2H:1O

Question 30

What is the test for glucose?

Answer 30

Benedicts solution (blue-red)

Question 31

What are biomolecules?

Answer 31

Made in living things (CHO, protein)