Bioenergetics 2 Flashcards
Explain the process of photosynthesis during the different stages
in the first stage of photosynthesis the plant takes in carbon dioxide and water into the leaf. Light energy is then absorbed by chlorophyll. This light energy is then used to convert the carbon dioxide and water into the sugar glucose, in this reaction oxygen is also produced.
What is the symbol equation for photosynthesis?
CO2 + H2O ➨ C6H12O6 + O2
Why might the rate of photosynthesis be lower in patchy leaves than normal ones?
Patchy leaves trap less light energy as they have less chlorophyll to absorb light and light is required for photosynthesis, leading to a lower rate of photosynthesis.
Why might temperature effect the rate of photosynthesis if it is increased (not to much) ?
Temperature might effect the rate of photosynthesis as the enzymes involved in photosynthesis work faster so the rate increases.
What may happen if we keep increasing the temperate of photosynthesis?
If we keep increasing the temperate of photosynthesis the enzymes involved will denature and the rate of photosynthesis will fall.
What do plants need to absorb from the soil to make amino acids using glucose?
Plants need to absorb nitrate ions from the soil to make amino acids using glucose.
Why might some gardeners use oil burners in green houses?
Oil burners release heat and carbon dioxide which are vital for the rate of photosynthesis to increase.
What is the symbol equation for anaerobic respiration?
Explain anaerobic respiration?
Anaerobic respiration is the type of respiration our body switches over to from aerobic respiration whenever we lack oxygen while performing activities such as exercising.
Why does aerobic respiration release more energy than anaerobic respiration?
During aerobic respiration glucose is oxidised whereas during anaerobic respiration the oxidation of glucose is incomplete.
What is oxygen debt?
Oxygen debt is the amount of extra oxygen your body needs to remove the lactic acid, and replace the body’s reserves of oxygen. (this is why people continue breathing rapidly after finishing exercising)
What happens to the lactic acid after its already been built up and has to leave?
The lactic acid is transported out of the muscles by the blood, it is then taken to the liver where its converted back into glucose within a series of chemical reactions.
What is metabolism?
Metabolism is the sum of all the chemical reactions in a cell or the body.
Glucose in plant cells can be converted to make cellulose, what does that do? Glucose in plant cells is also converted to starch, what does that do? Glucose in plant cells also reacts with nitrate ions to make amino acids, what does that do?
After glucose is converted to cellulose in plant cells it can be used to strengthen the cell wall. After glucose is converted to starch in plant cells it can be used as a storage form of glucose. After glucose has reacted with nitrate ions to make amino acids they can be used to synthesise proteins.
What makes up a lipid molecule?
A lipid is formed by 1 glycerol molecule and 3 fatty acid molecules.
