Topic 2 A Flashcards
(28 cards)
Similar cells make
Tissue
Tissues are organised into
Organs
Organs are organised into
Organ systems
What is a catalysts
Substance which increases speed of reaction without being used up in reaction
What are enzymes
Catalysts
Why do enzymes have active sights
So it can only catalyse one specific reaction
What happens when it gets to hot for an enzyme
It denatures
What can speed up enzyme catalysed reaction
Increase temp up to a certain point ( usually above 40)
Being at an optimum pH. Any higher or lower can slow it down, and to low or high can denature the enzyme
What enzyme breaks down starch into simple sugar
Amylase
What do Digestive enzymes break down
Large food molecules
What enzyme breaks down proteins into amino acids
Protease
What does the enzyme lipase do
Turn lipids into glycerol and fatty acids
Where is protease made
Pancreas
Stomach
Where is amylase made
Salivary glands
Pancreas
Small intestine
Where is lipase made
Pancreas
Small intestine
Where do amylase break down starch
Small intestine
Mouth
Where do protease break down protein
Small intestine
Stomach
Where does lipase break down lipids
Small intestine
What is the lock and what is the key
Enzymes active sight = lock
Substrate = key
Rate of reaction ( including when finding the mean) =
Change in mass / change in time
Or
Gradient
How to start every food test
Grind up food and add distilled water to dissolve some of it
Test for proteins
Biuret test
Add biuret solution
Will turn mauve or purple if present
Test for starch
Iodine test
Ads iodine solution
Will turn blue black I’d starch is present
Test for sugars
Benedicts test
Add benedicts reagent
Green yellow or red if present, depending on concentration of solution
