B3 Biological Molecules

Question 1

What are the building blocks of carbohydrates?

Answer 1

Simple sugars

Question 2

What are the building blocks of lipids?

Answer 2

Fatty acids and glycerol

Question 3

What are the building blocks of proteins?

Answer 3

Amino acids

Question 4

Which elements do carbohydrates contain?

Answer 4

Carbon, hydrogen, and oxygen

Question 5

Which elements do proteins contain?

Answer 5

Carbon, hydrogen, oxygen, and nitrogen

Question 6

Which elements do lipids contain?

Answer 6

Carbon, hydrogen, and oxygen

Question 7

What is cellulose used for?

Answer 7

• Makes up the plant cell wall

- Structure

Question 8

What is starch and glucose used for?

Answer 8

Used in respiration to provide energy for the organism

Question 9

Where is starch and glucose stored?

Answer 9

Cells

Question 10

How do amino acids bind together to make proteins?

Answer 10

They form chains

Question 11

What are lipids used for?

Answer 11

• To make cell membranes
• To store energy
• Insulation

Question 12

What is the test for starch?

Answer 12

Iodine solution

Question 13

What is the test for glucose?

Answer 13

Benedict’s solution

Question 14

What is the test for protein?

Answer 14

Biuret test

Question 15

What is the test for fats and oils?

Answer 15

Ethanol

Question 16

Result if starch is present

Answer 16

brown –> dark blue

Question 17

Result if glucose is present

Answer 17

Green –> yellow –> orange/red

Question 18

Result if protein is present

Answer 18

Turns purple

Question 19

Result if fat is present

Answer 19

Cloudy white solution formed

Question 20

What can be used as a solvent?

Answer 20

water

Question 21

Larger molecules of starch and glycogen

Answer 21

glucose