Enzymes Best Flashcards

1
Q

What does the shape of a protein depend on?

A

It’s function

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2
Q

What can proteins be used as in the body?

A

Structural components of tissue such as muscle
Hormones
Antibodies
Catalysts

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3
Q

What are chemical reactions in the cells controlled by?

A

By proteins called enzymes

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4
Q

What are enzymes

A

Biological catalysts which speed up reactions

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5
Q

What is the active site

A

The site on an enzyme on where the reactants bind

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6
Q

What can happen to the substrate in a reaction

A

The substrate can be held in the active site and either be connected to another molecule or broken down

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7
Q

What can enzymes do

A

Build large molecules from many smaller ones
Change one molecule into another
Break down large molecules into smaller ones

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8
Q

Give an example of a reaction where a enzyme Build large molecules from many smaller ones

A

Building starch from glucose molecules

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9
Q

Give an example when an enzyme Change one molecule into another

A

Converting one type of sugar into another

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10
Q

Give an example of when an enzyme can Break down large molecules into smaller ones

A

All digestive enzymes do this

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11
Q

What is a substrate

A

The material or chemical on which an enzyme acts

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12
Q

Why do enzyme reactions occur faster at higher temperatures?

A

At higher temperatures the molecules move around more quickly and so collide with each other more often and with more energy

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13
Q

Why if the temperature gets too high will an enzyme stop working?

A

If the temp gets too hot the enzyme stops working because the active site changes shape

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14
Q

What is denaturing

A

When an enzyme changes shape of an enzyme so that it can no longer speed up the reaction

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15
Q

Why is the ph important in enzyme reactions?

A

If the ph is too acidic or alkaline for the enzyme, the active site could change shape and the enzyme becomes denatured

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16
Q

What are digestive enzymes produced by

A

Specialised cells in glands in the lining of the gut

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17
Q

What is the process of digestion

A

The breakdown of large insoluble molecules into smaller soluble molecules

18
Q

Where is amylase produced

A

The salivary glands, pancreas, small intestine

19
Q

What does amylase catalyse

A

The digestion of starch into sugars

20
Q

Where does amylase catalyse digestion

A

Mouth and small intestine

21
Q

Where is protease produced

A

Stomach, pancreas, small intestine

22
Q

What are protein molecules made of?

A

Long chains of amino acids

23
Q

What does protease catalyse

A

It catalysts the breakdown of proteins into amino acids

24
Q

Where does protease catalyse its reaction

A

Stomach and small intestine

25
Where is lipase produced
Pancreas, small intestine
26
What does lipase catalyse
The breakdown of lipids (fats and oils) into fatty acids and glycerol
27
What conditions does protease work best in
Acidic conditions in the stomach
28
What makes the conditions in the stomach good for protease
Glands in the stomach wall produce HCL creating acidic conditions
29
In what conditions do amylase and lipase work best in
Slightly alkaline in the small intestine
30
What produces bile
Liver
31
Where is bile stored
Gall bladder
32
Why is the bile squirted into the small intestine
Neutralises the stomach acid and makes the conditions slightly alkaline it also emipulsifies the fat giving it a much larger SA
33
What produces the enzymes used in industry
Some microorganisms produce enzymes that pass out of their cells
34
What do biological detergents contain
Protease and lipases
35
Why are biological detergents better than normal detergents
They work at lower temperatures, saving energy and therefore money
36
What are protease smushed for in industry
They predigest in some baby foods
37
What is isomerise used to do in industry
To convert glucose syrup into fructose syrup
38
Why is fructose used in slimming foods
Is is sweeter, much less is needed so it is less fattening
39
What are carbohydrases used for in industry
To convert starch into sugar syrup for use in foods
40
In industry enzymes are used to bring about at normal .......... And .......... Traditional processes require ............... Equipment and a lot of ....... To produce ........... Temperatures and ..........
``` Temp Pressures Expensive Energy High Pressures ```
41
Advantages of enzymes
Enzymes in biological detergents are very effective at removing stains Biological washing powders can be used at lower temperatures, saving energy, reducing costs Some enzymes are used in medicine to diagnose, cure or even cure diseases Costs of equipment and energy can be reduced
42
Dials advantages of enzymes
If washing powders are misused people may have allergic reactions Enzymes may enter waterways via sewage system Industrial enzymes can be costly to produce Enzymes denature at high temp needed to kill pathogens Some fabrics such as wool will be digested by proteases