MACRO Review CW

Enzymes are

• nucleic acids
• proteins
• lipids
• carbohydrates

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .
  

What is the purpose  of an enzyme?

• give permission for the reaction
• raise activation energy
• speed up reactions
• control how many reactions occur

In the diagram, what is letter A? 

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

An enzyme speeds up a reaction by

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

In a chemical reaction, ________ are what you have at the end

• Products

• Molecules

• Reactants

• Substances

What happens when enzymes are heated to a high temperature?

• The enzymes die.
• The shapes of the enzyme are altered denature
• The enzymes' amino acid sequence changes.
• The enzymes remain the same

Label the parts of the enzyme model

a

b

c

d

Active site

Products

Enzyme

Substrate

Which major macromolecule is being represented in this image? 

• carbohydrate
• lipid
• protein
• nucleic acid

What is the function of nucleic acids?

• store genetic information
• store energy (long-term)
• store energy (short-term)
• build skin, hair, nails, muscles