Biological Molecules

Question 1

Identify the chemical elements present in carbohydrates

Answer 1

CHO

Question 2

Identify the chemical elements present in proteins

Answer 2

CHONS

Question 3

Identify the chemical elements present in lipids

Answer 3

CHO

Question 4

Describe the structure of carbohydrates

Answer 4

Large molecules make up smaller basic units (monomers)

Starch and glycogen from simple sugars (glucose)

Question 5

Describe the structure of proteins

Answer 5

Large molecules made up smaller basic units (monomers)

Proteins from amino acids

Question 6

Describe the structure of lipids

Answer 6

Large molecules made up smaller basic units (monomers)

Fatty acids and glycerol

Question 7

Describe the functions of proteins

Answer 7

Growth and repair

Question 8

Describe the functions of carbohydrates

Answer 8

Energy source

Question 9

Describe the functions of lipids

Answer 9

Protection of organs and insulation

Question 10

Describe how to determine the presence of starch

Answer 10

Iodine test

Question 11

Describe how to determine the presence of fat

Answer 11

Emulsion test

Question 12

Describe how to determine the presence of protein

Answer 12

Biuret test

Question 13

What is the role of enzymes

Answer 13

Biological catalysts in reactions

Question 14

Describe the lock and key theory

Answer 14

Enzymes are specific to their substrate

Question 15

What can affect enzyme activity and how

Answer 15

Temperature changes
Number of successful collisions
Changes to the active site (denaturation)

Question 16

How can functions of enzymes be affected?

Answer 16

Changes in pH as it alters the active site