Enzymes Biology STAAR Review

Enzymes need certain environmental conditions in order to function properly.  What happens when enzymes are heated to a high temperature?

• they die
• they denature
• they change their amino acid sequence
• they work better

Which of the following correctly describes how enzymes work?  

• they lower the energy of the reactants to increase the rxn rate
• they supply energy to the reaction to increase the rxn rate
• they lower the energy of the products to increase the rxn rate
• they lower the activation energy of the reaction to increase the rxn rate

The part of the enzyme that the substrate bonds to is called the _____.

• active site
• activation energy
• bond site
• peptide bond

What makes an enzyme substrate specific?

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

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 .
  

Which of these do NOT affect enzyme activity?

• Temperature
• pH
• Competitive Inhibitors
• Carbohydrates

Which biomolecule is made of mainly hydrocarbons and therefore is very hydrophobic?

• carbohydrate
• nucleic acid
• protein
• lipid

When water is added to split a molecule, the reaction is known as a(n) __ reaction.

• dehydration synthesis
• condensation
• hydrolysis
• super magical 

C₆H₁₂O₆ is the formula for which sugar?

• glucose
• frucotose
• maltose
• sucrose

Alpha helix and beta pleated sheets are part of what level of protein structure?

• primary
• secondary
• tertiary
• quaternary