Which of the following lowers the activation energy of reactions in biological systems?

• cellulose
• glycogen
• enzymes
• triglycerides

What is being represented by the letter B in the image?

• Substrate
• Enzyme
• Substrate
• Product

Tags

NGSS.MS-LS1-7

What is being represented by the letter A in the image?

• Substrate
• Enzyme
• Product
• Complex

What 3 letters do enzymes typically end in?

• -ose
• -ase
• -ese
• -tic

What affects Enzyme activity?

• Nothing
• Temperature, Environment, Diet
• Temperature,Activators, Ph levels, Inhibitors
• Cataylst and Substrate

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 .
  

on an enzyme, the site that attaches to a substrate

• Polypeptide 
• Base
• Substrate 
• Active site 

Which of the following environmental changes could denature an enzyme?

• too high a concentration of substrate
• too high a concentration of enzyme
• pH too low
• too low a concentration of substrate

Enzymes act by

• providing energy to a chemical reaction

• removing energy from a chemical reaction

• lowering the amount of energy needed for a chemical reaction

• eliminating the need for energy in a chemical reaction

Tags

NGSS.HS-PS1-4

Fireflies emit light. The production of light by an organism is called bioluminescence. To generate visible light, cells in a firefly’s tail produce thousands of luciferase enzymes. Luciferase binds to a chemical called luciferin. Once bound, the luciferase enzyme speeds up a chemical reaction that combines an oxygen molecule and luciferin to produce oxyluciferin. This reaction requires energy and releases light. Which of the following best describes how the luciferase enzyme speeds up the chemical reaction?

• Luciferase increases the amount of time the light is visible.

• Luciferase decreases the amount of energy required for the reaction to start.

• Luciferase increases the number of sites on luciferin that must bind to oxygen.

• Luciferase decreases the temperature of the environment inside the body of the firefly.

Tags

NGSS.HS-PS1-4