B3 - Digestion and enzymes

Question 1

what is the name of the enzyme that breaks down protein?

Answer 1

protease

Question 2

what is the name of the enzyme that breaks down lipids?

Answer 2

lipaese

Question 3

what is the name of the enzyme that breaks down carbs?

Answer 3

carbohydrase

Question 4

what are carbs broken down into?

Answer 4

sugars

Question 5

what is protein broken down into?

Answer 5

amino acids

Question 6

what are fats broken down into?

Answer 6

fatty acids and glycerol.

Question 7

what enzyme is found in the stomach

Answer 7

pepsin

Question 8

what does the enzyme pepsin break down?

Answer 8

protein

Question 9

what enzyme is found in the mouth?

Answer 9

amylase

Question 10

what does amylase break down?

Answer 10

starch

Question 11

where is amylase produced?

Answer 11

In the salivary glands and in the pancreas

Question 12

what is the job of bile?

Answer 12

bile emulsifies fat making it easier for enzymes to break it down and neutralises the PH for enzymes to work in

Question 13

where is bile produced?

Answer 13

in the liver

Question 14

where is bile stored?

Answer 14

In the gall bladder

Question 15

why is diffusion so effective in the small intestines?

Answer 15

there are villi which have:

• large surface area
• a very good blood supply
• a short diffusion path

Question 16

what is the job of the large intestine?

Answer 16

to push the waste through the body and squeeze out any water

Question 17

where are faeces stored and then released?

Answer 17

stored in the rectum

released through the anus

Question 18

what is an enzyme?

Answer 18

a biological catalyst that speeds up digestion

Question 19

what is the test for sugars?

Answer 19

add Benedict’s solution to the food, if it goes red, high concentration of sugar, if it goes green/orange, low concentration of sugars, if it STAYS BLUE, the food has no sugar in it.

Question 20

what is the test for starch?

Answer 20

add iodine to the food, if the iodine turns black/purple, then it contains starch, if it STAYS ORANGE then the food has no starch.

Question 21

what is the test for lipids?

Answer 21

1- add ethanol too solution of food, if it goes cloudy then it contains fats,
2- rub sample of food onto grease proof paper, if the paper becomes translucent the food contains fats.

Question 22

what is the test for protein?

Answer 22

add Beirut solution to food, if it goes pink/purple the food has protein in it, if the solution STAYS BLUE then the food contains no protein.

Question 23

what PH level does amylase work best in?

Answer 23

PH8 - alkali