HS LS1 7

Photosynthesis & Cellular Respiration Review

Photosynthesis & Cellular Respiration are processes that are part of the Carbon cycle

Photosynthesis & Cellular Respiration

• Reactants of one process....

• ... are the products of the other process

Multiple Choice

What are the products of Photosynthesis?

• water and ATP

• carbon dioxide and water

• glucose and oxygen

• oxygen and water

Multiple Choice

What are the products of Aerobic Cellular Respiration?

• Carbon dioxide, water and ATP

• Oxygen, glucose, and ATP

• ATP, oxygen and water

• Carbon dioxide, oxygen and glucose

Energy renewal

• Energy captured from sunlight by photosynthetic organisms is used and released in the cellular respiration of living things

• The energy that living things use, must continually be renewed through photosynthesis

Why is Photosynthesis so important?

• We must obtain glucose from plants

• Plants are the first step in the food chain

• The oxygen released during photosynthesis is necessary for many organisms.

​What Can Limit Photosynthesis?

• ​Amount of sunlight

• ​Amount of Carbon dioxide

• ​Temperature

Cellular Respiration

• Once solar energy is converted to chemical energy by photosynthesis, it has to be changed to a form that can be used by the organism

• Cellular respiration is the process that releases energy by breaking down food molecules in the presence of oxygen

Photosynthesis vs Cellular Respiration

Notice the order:

​

Photosynthesis - ETC then Calvin Cycle

​

Cellular Respiration - Kreb's Cycle then ETC

Photosynthesis vs Cellular Respiration

• Photosynthesis stores energy into glucose - Cellular Respiration releases energy from glucose

• Photosynthesis removes carbon dioxide and respiration returns it

Multiple Choice

Which of these will not affect photosynthesis?

• Light
• Temperature
• Glucose Availability
• Carbon Dioxide

Multiple Choice

When it is chilly and raining outside, there is no photosynthesis taking place. What is the limiting factor?

• Temperature
• Rainfall
• Carbon Dioxide

Multiple Choice

Increasing temperature can increase enzyme activity to a certain point. Then what happens?

• The enzymes have completed all the reactions so stop
• The enzymes have been denatured or destroyed
• Nothing - the rate continues to increase all the time

Multiple Choice

If a plant receives more carbon dioxide, what happens to the rate of photosynthesis?

• Increases
• Decreases
• Stays the same

Multiple Choice

Which process occurs in the Chloroplast?

• Photosynthesis

• Cellular Respiration

Multiple Choice

Which process gets energy from breaking bonds?

• Photosynthesis

• Cellular Respiration

Multiple Choice

Which lettered graph represents the affect of light intensity on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which process occurs in the Mitochondria?

• Photosynthesis

• Cellular Respiration

Multiple Choice

Which lettered graph represents the effect of temperature on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which process releases energy?

• Photosynthesis

• Cellular Respiration

Multiple Choice

Which process stores energy?

• Photosynthesis

• Cellular Respiration