A2 Photosynthesis Flashcards
(15 cards)
Equations for photosynthesis and respiration
Photosynthesis:
6CO2 + 6H2O + light energy → C6H12O6 + 6O2
respiration equation is reverse
where does the plant get CO2 from for photosynthesis?
From stomata-diffuses in
Where does the plant get water from for photosynthesis?
through xylem in the roots
2 uses of glucose produced in photosynthesis?
stored as starch, used in aerobic respiration
what happens 2 the oxygen produced in photosynthesis?
oxygen diffuses in2 the air thru the stomata
where do we get oxygen from for respiration?
diffuses in2 plant thru stomata from the atmosphere
where does glucose come from for respiration
diet, breaking down of starch
what happens to water and CO2 produced in respiration?
breathed out/released
relationship btw photosynthesis and respiration as light intensity increases?
photosynthesis increases @ greater rate than respiration bus of a higher vol of CO2 being taken in > released
What is the compensation point?
where photosynthesis rate is equal to respiration rate bcz the volume of CO2 entering the plant= Volume of CO2 leaving the plant
Explain the relationship between photosynthesis and respiration below the compensation point?
higher rate of respiration> photosynthesis bcz more CO2 going out the plant than in
explain why measuring CO2 uptake may/may not give a better indication of photosynthetic activity than measuring O2 production
- CO2 produced during respiration might be used during photosynthesis
- oxygen produced might be used in respiration
- O2/CO2 only produced/used in one NAMED stage of photosynthesis
what are the end products of anaerobic respiration?
lactate/ethanol
where does anaerobic respiration happen?
Cytosol/chloroplasts
