Enzymes 3

Enzymes are _____________?

• Hydrocarbons

• Hormones

• Lipids

• Proteins

What is an enzyme?

• A protein that speeds up chemical reactions

• A protein that breaks apart molecules

• A protein needed for cell structure

• A neurological protein involved in cell signaling

What is activation energy

• The energy released after chemical reactions

• The energy required to activate an enzyme

• Energy absorbed by chemical reactions

An enzyme speeds up a reaction by

• lowering the activation energy.
• raising the activation energy.
• releasing energy.
• absorbing energy.

In a chemical reaction, a reactant binds to an enzyme at a region known as the

• catalyst.
• product.
• substrate.
• active site. 

Which of the factors does NOT affect enzymatic activity?

• Temperature
• pH
• Concentration
• Color

In the diagram, what is letter A? 

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

The "lock and key hypothesis" attempts to explain the mechanism of?

• Vacuole formation
• Pinocytosis
• Sharing of electrons
• Enzyme specificity 

Which substrate would this enzyme catalyze?

• Δ
• σ
• ∅
• μ

What makes an enzyme substrate specific?

• Size
• Shape
• Name
• Location it is found in