Enzymes 999

WALT: Explain the role of enzymes in a chemical reaction

Do Now

Look at the example of chemical reactions. Based on the images and your knowledge of science, what is a chemical reaction?

What is a chemical reaction?

A process that changes one set of substances into another set of substances

​How do you know a chemical reaction  has occurred? 

•  Bubbling, spark, color change, heat, smell change

1. Reactant/Substrate: The substance that goes into the equation and is changed

2. Product: The result of the process

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​Parts of a chemical equation

1. Reactant/Substrate: The substance that goes into the equation and is changed

2. Product: The result of the process

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​Parts of a chemical equation

Categorize

Options (11)

Photosynthesis

Respiration

Rust

Baking a cake

Combustion

Decomposition

Melting ice

Boiling water

Breaking a glass

Chopping wood

Crushing a can

Which of these are chemical reaction and which are physical reaction?

Chemical Reaction

Physical Reaction

​Vocab:
3. Metabolism: All the chemical reactions in a body

Break down
(one reactant--> 2 products)

​​4. Digest/ Decomposition

​To build
(2 reactants --> 1 product)

​​5. Synthesis

​Chemical Reactions can build molecules or break down molecules

Metabolism Requires ATP (Energy)

Enzymes work by reducing the amount of ATP is needed for the reaction

Multiple Choice

Enzymes are specific

• They work on many different shaped substates

• They speed many different reactions in our body.

• They can only work on a substrate that matches their shape

• Their shape does not effect the reaction

Key Ideas
Enzymes are reusable.
Enzymes are specific. They fit with a specific substrate based on their shape.

Multiple Choice

In the diagram, what is letter A? 

• product
• substrate
• enzyme-substrate complex
• active site

Lactase is an enzyme that help us break down Lactose (a sugar) in our bodies

Draw

Draw an enzyme that may break down this lactose molecule

Multiple Choice

According to this image. what are the products of this reaction?

• Glucose and Galactose
• Lactose and Glucose

• Lactose and Lactase

• Lactose

Like an elevator...

Enzymes stop working when conditions aren't ideal.
These conditions include:
-Temperature
- pH
- water
- inhibitors
-etc.,

the process in which proteins lose its shape

6. Denaturation

Optimal conditions are at the peak of the graphs