Bioenergetics

Bioenergetics 

Photosynthesis 

Photosynthesis takes place inside chloroplasts. The reaction is endothermic meaning it requires energy. The source of this energy sunlight which is trapped by chlorophyll. 

Carbon dioxide + water -> glucose + oxygen 

There are four key factors affecting the rate of photosynthesis: 

• Temperature- an increase in temperature increases the rate of photosynthesis because more energy is provided.However, if the temperature is too high the enzymes will denature and not work anymore which causes the rate of reaction to drop. 

• Chlorophyll concentration- A high concentration of chlorophyll gives a high rate of photosynthesis. The rate of chlorophyll production can be decreased in mineral deficient soil. 

• Light intensity- the greater light intensity means greater rate of photosynthesis as there is more energy being provided. However, it only increases to a certain threshold as there are other limiting factors. 

• Carbon dioxide concentration-increased conducts a concentration increases the rate of photosynthesis as carbon dioxide is a reactant. However, above a certain threshold the rate does not increase as there are other limiting factors. 

A high rate of photosynthesis mean that crops grow faster in the total yield is bigger.  

Uses of glucose 

• Fats and oils stored in structures such as seeds.…