Enzymes and Diffusion

Question 1

What colour is the iodine solution in the presence of starch

Answer 1

Blue-black

Question 2

Why is the shape of an enzyme important for its function?

Answer 2

So that it fits the substance involved with the reaction it is catalysing

Question 3

What is Diffusion

Answer 3

Diffusion is where particles spread out from an area of a higher concentration to a lower concentration

Question 4

Proteases catalyse the breakdown of ….

Answer 4

…. proteins into amino acids

Question 5

What does it mean when an enzyme is being denatured?

Answer 5

It means that they are losing it’s specific shape and the substrate would not be able to fit into the enzyme.

Question 6

What happens to an enzyme if the temperature is too high?

Answer 6

.It would start to become denatured
.Bonds within the enzyme would begin to break
.The enzyme would not be able to work(not be able to catalyse)

Question 7

What do you use to test the presence of sugar in a food sample?

Answer 7

Benedict’s reagent

Question 8

Enzymes are biological catalysts that ……

Answer 8

…..speed up reactions in the body

Question 9

What is active transport?

Answer 9

It is the movement of particles against a concentration gradient from an area of low to high.
.It uses the energy transferred during respiration.
. Opposite of diffusion

Question 10

What is Osmosis?

Answer 10

It is the net movement of water molecules across a partially permeable membrane from a region of high to low concentration.
. It is a type of diffusion

Question 11

What do you use to test the presence of starch in a food sample?

Answer 11

Iodine solution

Question 12

How do you test the presence of lipids in a food sample?

Answer 12

Do emulsion test do detect lipids.

Question 13

What do you use to test the presence of protein in a food sample?

Answer 13

Biuret’s solution

Question 14

Equation for calculating energy in food?

Answer 14

Energy in food(J) = mass of water(G) * temp change of water ( °C)*4.2

Question 15

Energy per gram of food equation?

Answer 15

Energy in food (J)/ mass of food(G)

Question 16

What does the amylase enzyme break down and where is it found?

Answer 16

Breaks down starch into glucose. Found in the mouth

Question 17

What does the maltase enzyme break down and where is it found

Answer 17

Breaks down maltose into glucose. Found in the intestine

Question 18

What does the protease enzyme break down and where is it found

Answer 18

Protein into amino acids. Found in the stomach

Question 19

What does the lipase enzyme break down and where is it found?

Answer 19

Lipids/Fats into fatty acids and glycerol. Found in the small intestine.

Question 20

What does the carbohydrase enzyme break down and where is it found?

Answer 20

Breaks down carbohydrates. Found in the pancreas.

Question 21

How do you know if there is lipids after doing an emulsion test?

Answer 21

It would turn cloudy.

Question 22

How do you know if there is protein after inputting the biuret’s solution?

Answer 22

It would turn orange.