Digestion & Nutrition - The effect of temperature on enzymes

Question 1

Which enzyme digests starch into sugar ?

Answer 1

Amylase/carbohydrase

Question 2

When starch is digested, what is produced ?

Answer 2

Sugar/glucose

Question 3

Which enzyme digests proteins ?

Answer 3

Protease

Question 4

Where in the body does most digestion take place?

Answer 4

Small intestine

Question 5

What is a ‘deficiency disease’?

Answer 5

A disease caused by a lack of something in the diet – e.g. a vitamin or mineral

Question 6

What does Amylase do ?

Answer 6

It digests starch into sugar

Question 7

What is the colour change of Amylase as the starch is digested

Answer 7

The blue-black colour disappears as the starch is digested.

Question 8

‘Temperature affects the rate at which
starch is broken down by amylase’: identify the independent variable

Answer 8

Temperature of the solution

Question 9

‘Temperature affects the rate at which
starch is broken down by amylase’: identify the dependent variable

Answer 9

Time taken to break down the starch

Question 10

‘Temperature affects the rate at which
starch is broken down by amylase’: identify the control variables

Answer 10

Volume of starch and the volume of the amylase

Question 11

Why do extremely high temperatures make the digestion nearly impossible ?

Answer 11

enzyme becomes permanently damaged/denatured and the molecule it works on can no
longer fit in.