Exam (elaborations)
Bioenergetics flash cards AQA
Flash cards designed from the specifications of AQA on unit 4 bioenergetics to help reach grade 9 in GCSE
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Bioenergetics Word equation for photosynthesis?
Carbon dioxide + water —> glucose + oxygen
Why is fermentation important?
Economic importance in the manufacture of bread (carbon dioxide) and alcoholic
drinks (ethanol)
Chemical symbol for photosynthesis balanced
6CO2 + 6H20 —> C6H12O6 + 6O2
Is photosynthesis endothermic or exothermic?
Endothermic( it takes in light energy)
What happens as you increase light intensity?
Rate of photosynthesis increases
When is light intense no longer a limiting factor?
When you increase the light intensity but the rate of photosynthesis becomes
constant
What happens when you increase the level of carbon dioxide?
Rate of photosynthesis increases
When is carbon dioxide the limiting factor ?
When you increase the level of carbon dioxide but the rate of photosynthesis doesn’t
increase
How does the amount of chlorophyll in the leaf affect photosynthesis?
Leaves with less chlorophyll can trap less light energy and will have a lower rate of
photosynthesis
What happens if you keep increasing the temperature ?
The enzymes involved in photosynthesis will become denatured and the rate will fall
Why is it important for glucose to be used as cellulose?
Strengthen cell walls
Why do farmers want to increase the rate of photosynthesis?
As this increases the yield of crop they produce
Word equation for aerobic respiration?
Glucose+ oxygen —> carbon dioxide + water + energy
How do farmers increase rate of photosynthesis?
Control heat + light in a greenhouse and increase level of carbon dioxide
Symbol equation for aerobic respiration?
C6H12O6 + 6O2 —> 6CO2 + 6H2O
Word equation for anaerobic respiration in plant and yeast cells?
Glucose —> ethanol + carbon dioxide + energy
What is anaerobic respiration in yeast cells called?
Fermentation
What happens as you increase the temperature?
The enzymes involved in photosynthesis work after so the rate increases but at a
point the enzymes become denatured
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