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GSCE-Biology > Enzymes > Flashcards

Enzymes Flashcards

1
Q

Digest?

A

To break down

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2
Q

Synthesis

A

Build large molecules with small molecules

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3
Q

Monomer

A

One molecule

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4
Q

Polymer

A

Repeating number of similar small molecules

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5
Q

Catalyst

A

Speeds up chemical reactions

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6
Q

Substrate

A

The beginning reactants

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7
Q

Product

A

The end result

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8
Q

Enzyme

A

A biological Catalyst, acidic and strong

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9
Q

What does benedict test for

A

reducing sugars

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10
Q

What does biuret test for

A

protein

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11
Q

What does iodine test for

A

starch

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12
Q

What does emulsion test for

A

lipids/fat

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13
Q

What colours to benedict turn in a reaction

A

P=Red, N=Blue

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14
Q

What colours to Biuret turn in a reaction

A

P=Purple N=Blue

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15
Q

What colours to iodine turn in a reaction

A

P=Blue/Black N=Brown

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16
Q

What colours to ethanol turn in a reaction

A

P=Cloudy N=Clear

17
Q

What is The lock and Key model

A

A model that represents a substrate fitting into an active site

18
Q

What does De-natured mean

A

It is when a part of a cell, changes shape because of a change in pH or temperature

19
Q

3 examples of main digestive enzymes

A

Lipase, Protease, Amylase

20
Q

Core practical: pH and enzyme

A

One tube of starch
One tube of Amylase
Warm up
Mix tubes and start timer
every 30, remove small sample and test with iodine
Stop when change stops

21
Q

How to test for Sugars

A

Add Benedict’s reagent to the food and boil in a water bath.

22
Q

How to test for starch

A

Add iodine reagent to the food.

23
Q

How to test for protein

A

Add Biuret reagent to the food.

24
Q

How to test for fats

A

Add ethanol to the food to dissolve the fat then add water.

25
Q

Why is amylase not produced in the stomach

A

Too high pH which would cause the denaturing of the active site

26
Q

Explain why catalysis by enzymes is important for life processes

A

Because reactions happen much faster

GSCE-Biology (27 decks)

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