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Enzyme Basics for Biology Students

Enzymes are protein molecules that speed up chemical reactions in living things. They work by lowering the activation energy of reactions through the formation of enzyme-substrate complexes, where the substrate binds to the active site of the enzyme. Key terms include the enzyme-substrate complex, the active site where substrates bind, and allosteric sites that can affect activity. Denatured enzymes lose their structure and function. Enzyme activity depends on factors like temperature, pH, and inhibitors. Allosteric regulation allows pathways to be inhibited by their end products through negative feedback.

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Mohd Asrul
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49 views1 page

Enzyme Basics for Biology Students

Enzymes are protein molecules that speed up chemical reactions in living things. They work by lowering the activation energy of reactions through the formation of enzyme-substrate complexes, where the substrate binds to the active site of the enzyme. Key terms include the enzyme-substrate complex, the active site where substrates bind, and allosteric sites that can affect activity. Denatured enzymes lose their structure and function. Enzyme activity depends on factors like temperature, pH, and inhibitors. Allosteric regulation allows pathways to be inhibited by their end products through negative feedback.

Uploaded by

Mohd Asrul
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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TUTORIAL 1

ENZYMES

1. What are enzymes? What is the importance of enzymes for living beings?

2. Explain the mechanism of enzyme activity that able to speed up a chemical


reaction.

3. Define the following terms:

i) Enzyme-substrate complex

ii) Active site

iii) Allosteric site

iv) Cofactors

4. What happens to a denatured enzyme regarding its functionality? How can


that result be explained with the help of the lock and key model?

5. Differentiate the enzymatic activity between induced fit and key and lock
model.

6. Give two classes of enzymes and state the functions according to the types of
reaction they catalyze.

7. Explain four factors that affecting enzyme activity.

8. Differentiate between competitive inhibition and non-competitive irreversible


inhibition

9. Explain the allosteric regulation of metabolic pathway by end product inhibition.

10.List and briefly describe three types of enzyme cofactors.

11.Define negative feedback inhibition.

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