4 - Enzyme

Enzymes will make a reaction go _______ and use ______ energy.

• faster, less
• faster, more
• slower, less
• slower, more

Tags

NGSS.HS-PS1-5

Which of the following tasks listed below is most associated with enzymes?

• catalyze chemical reactions                  
• store genetic information       
• store chemical energy in the cell   
• dissolve nutrients and minerals 

Tags

NGSS.MS-LS1-7

Enzymes are capable of increasing the rate of a chemical reaction within a living cell.  Enzymes accomplish this through which of the following means?

• reducing the number of products   
• reducing the activation energy
• increasing the temperature of the cell
• increasing the concentration of reactants 

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Cells can produce over one thousand different enzymes at a time.  Enzymes are critical to the metabolism of these cells, but why are so many different enzymes needed?

• Cells are completely unable to control what enzymes
  they produce
• The variety of enzymes prevents their actions from being inhibited. 
• The active site of an enzyme can only bind to a specific substrate.
• The products of a reaction are always converted into new enzymes.

Which factors can change the shape of an enzyme and thus denatures a enzyme?

• Excessive heat and changes in pH
• Nothing can
• Exposure to light and sound
• Exposure to bacteria and Amoebas

Enzymes are composed of what organic molecule?

• Sugars
• DNA
• Proteins
• Fatty Acids

Tags

NGSS.HS-LS1-6

What happens to an enzyme when it is denatured?

• Activation energy is lowered.
• It becomes stronger.
• It loses its shape.
• Activation energy is raised.

Tags

NGSS.MS-LS1-2

Every enzyme has a optimal temperature and pH. True or False?

• True 
• False

Enzymes influence chemical reactions in living systems by:

• Providing the substrate required for the reaction to occur.
• Affecting the rate at which reactions occur.
• Absorbing water released when polymers are formed.
• Combining with excess hydrogen to from gaseous wastes. 

Tags

NGSS.HS-LS2-5

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

• Vacuole formation
• Pinocytosis
• Sharing of electrons
• Enzyme are specific to a substrate