Unit 2- Carbohydrates

Question 0

What are carbohydrates?

Answer 0

Compounds made up of carbon, hydrogen and oxygen

Question 1

Why are carbohydrates needed in the body?

Answer 1

They supply the body with energy

Question 2

What is the ratio if hydrogen to oxygen in carbohydrates?

Answer 2

2moles of hydrogen to 1mole of oxygen

Question 3

What 2 groups can carbohydrates be split into?

Answer 3

Sugars(small molecules)

Starches(very long molecules)

Question 4

Give 4 examples of sugars

Answer 4

Glucose
Fructose
Maltose
Sucrose

Question 5

How can sugars be detected?

Answer 5

By using Benedict’s solution

Question 6

What sugar doesn’t give a positive test for Benedict’s solution?

Answer 6

Sucrose

Question 7

Does starch give a positive Benedict’s test?

Answer 7

No

Question 8

How can starch be identified?

Answer 8

Gives a positive test for iodine solution

Question 9

What is starch?

Answer 9

A natural condensation polymer made of many glucose molecules linked together

Question 10

What is starch often called?

Answer 10

Polysaccharide

Question 11

What do plants convert glucose into and why?

Answer 11

Starch for storing energy

Question 12

What happens to starch during digestion?

Answer 12

It is hydrolysed to glucose which is carried by the blood stream to body cells

Question 13

What can the hydrolysis of starch be catalysed by?

Answer 13

Acid and enzymes

Question 14

What temperature do body enzymes work best at?

Answer 14

37°C