Digestive system

Question 1

What are the main organs of the digestive system

Answer 1

Mouth salivary gland gullets stomach liver pancreas gal bladder small intestine large intestine rectum anus

Question 2

What is a nutrient

Answer 2

A substance needed for growth repair and metabolism

Question 3

What are the three main nutrients

Answer 3

Protein carbohydrates lipids

Question 4

What gases do lipids contain

Answer 4

Carbon hydrogen oxygen

Question 5

What gases do carbohydrates contain

Answer 5

Carbon hydrogen oxygen

Question 6

What gases do proteins contain

Answer 6

Carbon hydrogen oxygen and nitrogen

Question 7

What do you use to test for starch

Answer 7

Iodine

Question 8

What colour is starch at the beginning and end of the test

Answer 8

Beginning yellow brown

End blue black

Question 9

What do you use to test for sugar

Answer 9

Add Benedict’s and boil

Question 10

What colour is the sugar test at the start and end

Answer 10

Start blue

End orange red

Question 11

What do you use to test for protein

Answer 11

Add biuret to starch

Question 12

What colour is protein at the start and end of test

Answer 12

Start blue

End purple

Question 13

What do you test lipids with

Answer 13

Mix with ethanol filter it and add to water

Question 14

What colour are lipids at the start and end of the test

Answer 14

Start clear

End cloudy

Question 15

What are enzymes made of

Answer 15

Protein

Question 16

What is a catalyst

Answer 16

Speeding up the chemical reaction with out getting used up

Question 17

What do enzymes act on

Answer 17

Substrates

Question 18

What is the active site

Answer 18

The part of an enzyme that one or more substrates molecules can attach to

Question 19

What is a substrate

Answer 19

What the enzyme is working on

Question 20

What is the enzyme that works on the substrate protein

Answer 20

Protease

Question 21

What is an enzyme

Answer 21

A biological catalyst that is specific to one substrate it is protein made out if long chains of amino acids coiled and folded

Question 22

What is the enzyme that works on the substrate fat

Answer 22

Lipase

Question 23

What is the enzyme that works on the substrate starch

Answer 23

Amylase

Question 24

What are the three stages of a enzyme and substrate

Answer 24

1 the enzyme has a specific shape and active site only specific substrates will fit into the active site 2 the enzyme and substrate together form a substrate complex 3 the reaction takes place and new products are released from the enzyme the enzyme is ready to react with another substrate

Question 25

What happens to enzymes at very low temps

Answer 25

They are in active

Question 26

Why is a enzyme in active at very low temps

Answer 26

Because molecules move slower so there will be less collisions

Question 27

Why is a enzyme active at very high temps

Answer 27

Molecules move faster more collisions

Question 28

If the enzyme goes above the optimum temp it is denatured what does this mean

Answer 28

Enzymes are made up of long amino acid strips they can be denatured when exposed to certain temps the amino acids unraveled changing the shape of the active site substrates no longer fit

Question 29

What is the function of lipids in the body

Answer 29

Important source of energy and an efficient energy store important in cell membranes and in your nervous system

Question 30

What foods do you find lipids in

Answer 30

Oils butter cream and cheese

Question 31

What is the function of carbohydrates in the body

Answer 31

Broken down into glucose and are used in cellular respiration to provide energy

Question 32

What foods are carbohydrates found in

Answer 32

Bread rice pasta potatoes

Question 33

What is the function of protein in the body

Answer 33

Structural components of tissues act as hormones make up antibodies and enzymes

Question 34

What food do you find protein in

Answer 34

Egg meat fish cheese pulses