11B Enzymes

Multiple Choice

What is the primary role of enzymes in cells?

• To provide energy for cells

• To act as structural components

• To speed up chemical reactions without being consumed

• To store genetic information

Multiple Choice

Why are enzymes compared to a lock and key?

• Because they are hard to open

• Because each enzyme works with only specific substrates

• Because they can open any lock

• Because they change shape easily

Labelling

Label the enzyme, substrate, enzyme-substrate complex, and products.

Drag labels to their correct position on the image

Products

Enzyme

Substrate

Enzyme-substrate complex

Multiple Choice

How do enzymes affect the activation energy of a reaction?

•  They increase the activation energy

• They have no effect on activation energy

• They lower the activation energy

• They stop the reaction from occurring

Multiple Choice

Which of the following factors does NOT affect enzyme activity?

• Temperature

• pH levels

• Light intensity

• Substrate concentration

Multiple Choice

What happens to an enzyme when it denatures?

• It speeds up

• It changes shape and loses function

• It works better

• It breaks into pieces

Hotspot

Select the optimal point for the enzyme on the graph.

Multiple Choice

Which enzyme is responsible for breaking down lactose in milk?

• Salivary Amylase

• Protease

• Lactase

•  Catalase