Photosynthesis vs. Cell Respiration

By: Madeline and Geetika


3 stages:

1. Energy is captured from sunlight in the thylakoids to produce chemical energy

2. Light energy is converted to chemical energy in the thylakoid, which is temporarily stored in ATP, water then breaks down oxygen and produces ATP

3. The chemical energy stored in ATP powers the formation of organic compounds (i.e. sugar) using carbon dioxide in the stroma

Photosynthesis occurs in the plant cell which is in the mesophyll tissue which is inside the stem of a leaf, chloroplast carries out the process

Chemical equation: CO₂+H₂O+energy → O₂+ C₆H₁₂O₆

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Cellular Respiration


Aerobic activities- Oxygen enters plant cells through the stomata. Plants produce their food via photosynthesis and release energy from it tortuga the process of process of respiration.

~ (Energy via sunlight)

~ Carbon dioxide + Water Glucose + Oxygen


Aerobic activities- Glucose is broken down by oxygen to release energy with carbon dioxide and water being produced as by-products of the reaction. The released energy is used to make a special energy molecule called Adenosine triphosphate (ATP). ATP is where the energy is stored for use later on by the body.

Glucose + Oxygen Carbon dioxide + Water + Energy

C6H12O6 + 6O2 6CO2 + 6H2O + 2900 kJ/mol

Anaerobic activities-bAnaerobic respiration is not as efficient as aerobic and only a small amount of energy is produced. This is due to the fact that glucose can only be partially broken down. Our muscles need oxygen and glucose to respire aerobically and produce the energy they require to carry activities on. These are carried to the muscle via the blood.

Glucose ----> Lactic acid + Energy

C6H12O6 --------> 2C3H6O3 + 120 kJ/mo


They both involve the exchange of the gases; oxygen and carbon dioxide. Both reactions transform energy in one way or another - either storing it or releasing it. Both photosynthesis and cellular respiration produce ATP. They also both depend on the Electron Transport Chain to pump electrons across the membranel