1. Photosynthesis, Respiration And Energy Flashcards
Plant and animal cells need energy for —————— processes to occur
Biological
Define photosynthesis
The process where energy from light is used to make glucose from water and carbon dioxide
Write the equation for photosynthesis
6CO^2 + 6H^2O + energy —> C^6H^12O^6 + 6O^2
Where is energy stored and why?
Energy is stored in the glucose until plants release it by respiration
What is photosynthesis an example of?
Metabolic Pathway
Define a metabolic pathway
The process where a series of snap reactions are controlled by enzymes
Define respiration
The process of plant and animals cells releasing energy
What are the two types of respiration
- Aerobic= uses oxygen
- Anaerobic= doesn’t use oxygen
What is the equation for aerobic respiration?
C^6H^12O^6 + 6O^2 —> 6CO^2 + 6H^2O + energy
What does anaerobic respiration produce?
- Ethanol and carbon dioxide
- releases energy
Anaerobic and aerobic reactions are all ___________ ___________
Metabolic reactions
Define ATP
The immediate source of a cells energy
What is used to make ATP?
Energy released by glucose is used to make ATP
Describe the features of ATP
- small
- soluble
- easily transported
ATP + Glucose = ________________
Phosphorylation
What is the term used to describe when the rate of photosynthesis exactly matches the rate of respiration?
Compensation Point
When a compensation point is present there is no what?
Net gain
Describe one way to work out the compensation point
- measure the rate of oxygen produced by the plant at different light intensities
Define phosphorylation
Adding a phosphate to a molecule
what is photoionisation?
when chlorophyll absorbs light via photosystems it excites the electron moving it to a higher energy level
