Biology Revision

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  • Created by: holly.567
  • Created on: 21-02-16 19:08
What is the optimum?
The best environment for activity highest point when enzymes are most active.
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What is a substrate?
The thing that an enzyme acts upon.
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What is a catalyst?
A substrate that speeds up a chemical reaction.
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WHat is the active site?
The place where the reaction occurs.
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Why are enzymes specific to their substrate?
They are specific because they are fitted to the shape of the active site so they enzyme activity is as high as possible.
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What is denatured?
When an enzyme looses shape which results in a decrease of reactivity.
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Why do we need to digest food?
So we can get all the nutrients out of it and to increase the surface area so there is more area for the enzymes to attack the food, letting it break down quicker.
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What are enzymes?
enzymes are a type of (biological) catalyst and protein.
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What reactions in cells are catalysed by enzymes?
Respiration, Digestion, and Phtosynthesis.
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What do enzymes increase?
The rate of reactivity otherwise it would be too slow.
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What does each protein have?
Each protein has a unique number and order of amino acids which results in different shaped molecules with different functions.
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Where is lipase made?
In your stomach.
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What does lipase do?
Lipase breaks down fat molecules into glycerol.
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Where does lipase work?
In your gut.
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What does ASE mean?
Enzyme.
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Where is amylase produced?
In your salivary glands.
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Wheredoes your amylase work?
In your mouth (its in your saliva).
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What does amylase do?
Breaks down starch into glucose via carbohydrase.
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Why is hydrochloric acid in your stomach?
Its in your stomach Because protease enzymes like to work in acidic pH conditions.
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Where is protease made?
In your Stomach.
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Where is protease used?
In your gut.
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What does protease do?
It breaks down protein molecules into amino acids.
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Where is bile produced?
In your liver.
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What does bile do?
It emulsifies fat- breaking it doqn into a larger surface area and neutralises acid to make the best pH for the enzymes in the small intestine.
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What temperature do enzymes work best around?
About 40(0c) this is because its the temperature of the human bodies amylase and it can readily break down waste.
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Why is there an increase in reactivity up to 40(0c)?
Because as the temperature rises the particles gain energy which results in a greater number of successful reactions.
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What is the enzyme substrate complex?
This is where the substrate has locked into the active site but hasn't yet broken the molecule.
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What do enzymes do with the molecule once its in the sactive site?
The enzyme splitas and divides the molecule.
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Is an enzyme non-recycleable or recycleable?
Recycleable because it can break down millions of molecules and doesnt stop.
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What is the product?
The product is the end outcome of the broken up molecule.
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Where are villi (villus) found?
Villi are found in the small intestine.
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What do villus allow?
They allow digested food to pass through the small intestine easily into blood vessels.
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What does the lymph do?
Carries fatty acids and glycerol to the rest of the body through lacterals at the base of a villi.
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What do villi increase?
The small intestines surface area.
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What does the blood capillary do?
The blood capillary picks up food molecules and amino acids, sugars, fatty acids, glycerol molecules are all absorbed. It then takes food molecules away to the rest of the body.
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Where is the pancreas?
The pancreas is below the stomach.
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Where is the stomach?
The stomach is the bottom segment of the rectangle and too the left above the pancreas.
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Other cards in this set

Card 2

Front

The thing that an enzyme acts upon.

Back

What is a substrate?

Card 3

Front

A substrate that speeds up a chemical reaction.

Back

Preview of the back of card 3

Card 4

Front

The place where the reaction occurs.

Back

Preview of the back of card 4

Card 5

Front

They are specific because they are fitted to the shape of the active site so they enzyme activity is as high as possible.

Back

Preview of the back of card 5
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