Name _____________________________________________________ Date _______________ Period ________
Bioenergetics Response Questions
1. Explain how the structure of the inner mitochondrial membrane aids in the function of the
mitochondrion. BIO A.3.1.1
2. You are preparing for a marathon. The night before the race, you eat a large bowl of pasta and a baked
potato. Both are high in carbohydrates. During the race, you begin to feel hot and thirsty. You drink an
energy drink to help you cool down. BIO A.3.2.1
A. Explain how your meal helps you to prepare to supply energy to your muscle cells during the
marathon.
B. Explain why you begin to feel hot during the race, in terms of energy and cellular respiration.
C. During intense effort, muscle cells may switch to anaerobic respiration. Describe what you
should do to avoid this during the race.
3. When temperatures become too warm, leaves close their stomata to conserve water. How will high
temperature most likely affect the rate of photosynthesis? BIO A.3.2.1
Name _____________________________________________________ Date _______________ Period ________
4. A.3.2.2
Use the diagram below to answer question.
A. Explain why ATP is important in biochemical reactions.
B. Give two examples of biochemical reactions and explain how an organism uses ATP within the
reactions.
5. The law of conservation of energy states that energy cannot be destroyed or created. It can only change
in form and move from place to place. An ATP molecule in an animal cell is used for energy.
BIO A.3.2.1, BIO A.3.2.2
A. Explain how the energy reached the ATP molecule from its original source.
B. Describe how energy changed in form from its original source to the ATP molecule.
C. Explain how the energy changes when the ATP molecule is converted to ADP and phosphate.
Name _____________________________________________________ Date _______________ Period ________
KEY for Bioenergetics
1. In cellular respiration, most of the ATP is produced when ions flow across the inner mitochondrial
membrane, powering ATP synthase. This enzyme synthesizes ATP from ADP and phosphate. Having a
larger surface area for these processes to occur increases the rate of ATP production. The highly folded
structure of the membrane increases its surface area.
2.
3. When temperature is high, stomata close to prevent water loss from the plant. This reduces the
plant’s ability to take in carbon dioxide for photosynthesis. Therefore, the rate of photosynthesis
is likely to decrease in higher temperatures.
Name _____________________________________________________ Date _______________ Period ________
4.
5.
Name _____________________________________________________ Date _______________ Period ________