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Enzyme theory

Authored by Blue Dragon

Biology

8th - 11th Grade

Used 4+ times

Enzyme theory
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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

1. Enzymes will usually react with only one substance. This can be explained by the 'lock and key' theory. If this theory is correct, which of the following substances, represented by P, Q, R and S would be acted on by enzyme A?

P

Q

R

S

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If an enzyme-controlled reaction normally takes place at 10ºC, in general terms how will the reaction be affected by a fall in temperature to 2°C

The reaction will speed up

The reaction will slow down

There is no change to reaction speed

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If an enzyme-controlled reaction normally takes place at 10ºC, in general terms how will the reaction be affected by a rise in temperature to 20°C ?

The reaction will speed up

The reaction will slow down

There will be no change to reaction speed

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

1. The graph shows the rate of an enzyme

reaction at different levels of acidity or

alkalinity (pH). From the graph, what is the

optimum pH for this enzyme?

pH 2

pH 7

pH 10

none of these

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A protein-digesting enzyme when mixed with starch solution would:

have no action

produce amino acids

produce glucose

digest the starch

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

All enzymes are produced inside ……...............…

animals

cells

catalysts

nuclei

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Enzymes which do their work outside cells are called ……...............

extra-cellular

intra-cellular

multi-cellular

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