3.3 Photosynthesis Flashcards
What is photosynthesis?
Is the process used by green plants to produce glucose (sugar)
Where does photosynthesis take place?
Chloroplasts (which contain chlorophyll, makes plant green)
What are the two stages of photosynthesis?
Light reactions (stage 1)
Carbon fixation (stage 2)
What are the stages of photosynthesis controlled by?
Enzymes
What is the first part of light reactions? (Stage 1)
Light energy (from sun) is absorbed by chlorophyll and converted into chemical energy
What happens in stage 1 (light reactions) after the chlorophyll has been converted into chemical energy?
The chemical energy is used to split water into hydrogen and oxygen, and produce ATP
What will happen in stage 1 (light reactions) after water has been split?
The oxygen will diffuse out of the cell, and the hydrogen and ATP will move to stage 2 (carbon fixation)
What is carbon fixation? What happens in the first part of stage 2 (carbon fixation)?
Carbon fixation is a series of reactions, in which the hydrogen (from the light reactions) and carbon dioxide combine to form glucose
What happens in stage 2 (carbon fixation) after glucose is formed)? What does it require next?
Carbon fixation also requires ATP (from the light reactions)
What is the word equation for photosynthesis?
Water + carbon dioxide»_space;>light energy enzymes chlorophyll»> glucose + oxygen
What is glucose used for?
Starch (storage carbohydrate)
Energy (through respiration)
Cellulose (structural carbohydrate)
What can a limiting factor do?
Reduce the rate of photosynthesis
What are types of limiting factors?
Light intensity
Temperature
Carbon dioxide concentration
