Quiz: Enzymes

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.

Tags

NGSS.MS-PS1-2

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 .
  

Tags

NGSS.MS-PS1-2

Any substance that is acted upon by an enzyme is called a(n)?

• Coenzyme
• Substrate
• Vitamin
• Polypeptide

Tags

NGSS.MS-LS1-7

Based on the graph, what is the optimal temperature for this enzyme? 

• 15^oC
• 40^oC
• 30^oC
• 35^oC

Tags

NGSS.MS-PS1-4

Most enzymes are...

• nucleic acids

• proteins

• lipids

• carbohydrates

An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 

• true
• false

Tags

NGSS.MS-LS1-7

What happens when enzymes are heated to a high temperature?

• The enzymes die.

• The shapes of the enzyme are altered or denature

• The enzymes' amino acid sequence changes.

• The enzymes remain the same

What is another name for enzymes?

• DNA

• microorganisms

• biological catalysts

• vitamins

Babies do not have well developed digestive systems for breaking down proteins; therefore baby food is prepared after treatment with which enzyme? 

• protease
• lipase
• carbohydrase
• synthase

Tags

NGSS.MS-LS1-7

The pH at which an enzyme is most efficient is called the _________ pH of an enzyme.

• neutral
• optimum
• minimum
• experimental