AQA 9-1 Biology B2 mid topic test revision enzymes

Each enzyme only has 1 substrate that will fit its active site.  What is this called?

• reusablility
• denaturation
• specificity
• fragility

With what 3 letters do enzymes typically end?

• -ose
• -ase
• -ese
• -tic

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

• Enzymes increase the energy of the reactants.
• Enzymes decrease the energy level of the products.
• Enzyme decrease the activation energy of the reaction.
• Enzymes reverse the direction of the reaction.

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 .
  

In the diagram, what is letter A? 

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

Enzymes are...

• nucleic acids
• proteins
• lipids
• carbohydrates

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

Which of these is most likely an enzyme?  

• Sucrose
• Galactose
• Fructose
• Amylase

Amylase breaks down _______(1)______ into ______(2)_______

• (1) Proteins

  (2) Amino Acids

• (1) Starch

  (2) Simple sugars

• (1) Fats/Lipids

  (2) Fatty Acids and Glycerol

• (1) Maltose

  (2) Glucose

Protease breaks down _______(1)______ into ______(2)_______

• (1) Proteins

  (2) Amino Acids

• (1) Starch

  (2) Simple sugars

• (1) Fats/Lipids

  (2) Fatty Acids and Glycerol

• (1) Maltose

  (2) Glucose