Energy, Organisms, and Enzymes

The graph below shows how the activity of an enzyme changes over a range of pH values. 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 continually increases as pH increases from 5.0 to 9.0
• The enzyme’s activity is greater around pH of 8.0 than around pH of 5.0.

The diagram below illustrates a biochemical process that occurs in organisms. What is another name for the substance labeled "catalyst"?

• Enzyme
• inorganic compound
• Hormone
• Antibody

What will most likely happen if an appropriate enzyme is added to a chemical reaction? 

• The reaction rate will increase.
• The equilibrium of the reaction will be maintained. 
• The reaction rate will decrease.
• The reaction will stop. 

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NGSS.HS-PS1-5

The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements? 

•  Enzymes function best at a specific temperature.
• The body needs to be warm to prevent hypothermia.
• The body is kept relatively warm to prevent too much enzyme action.
•  There is no connection between the two statements. 

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NGSS.HS-LS1-3

Plant cell structures that turn energy from sunlight into food.

• Cell Wall
• Mitochondria
• Chloroplast
• Cytoplasm

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NGSS.HS-LS1-5

NGSS.HS-LS2-5

What is cellular respiration?

• The conversion of glucose to solar energy

• The conversion of solar energy to chemical energy

• When glucose is made by chloroplasts

• When glucose is converted to usable energy called ATP

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NGSS.HS-LS1-7

How does temperature and pH affect enzymes?

• Enzymes are only active in a specific range of temperature and pH

• As temperature and pH increase, the enzymes work faster and faster

• Enzymes prefer cold temperatures and high pH

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NGSS.HS-LS2-5

Plants that do lots of photosynthesis will have great numbers of _______.

• Mitochondria

• Lysosomes

• Chloroplasts

• Nuclei

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NGSS.HS-LS1-5

NGSS.HS-LS2-5

What is the relationship between photosynthesis and cellular respiration?

• Photosynthesis and cellular respiration have the same products.

• Photosynthesis and cellular respiration have the same reactants.

• The products of photosynthesis (sugar and oxygen) are the reactants of cellular respiration.

• The reactants of photosynthesis (carbon dioxide and water) are the reactants of cellular respiration.

Tags

NGSS.HS-LS2-5

Enzymes are composed of which macromolecule.

• lipids
• protein

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NGSS.HS-LS1-1