Exam (elaborations)
B1 - Cells
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B4 – BioenergeticsReactants for photosynthesis####carbon dioxide + water
products of photosynthesis####glucose + oxygen
Word equations for photosynthesis####carbon dioxide + water —> glucose + oxygen
What energy is required for photosynthesis?####Light
Where does photosynthesis take place?####Chloroplasts
What substance is in chloroplasts enables photosynthesis?####Chlorophyll
What are the limiting factors of photosynthesis?####light intensity, carbon dioxide concentration
and temperature
How is glucose used in plants?####Respiration, cellulose production, amino acids production, stores
How is glucose used in respiration?####Energy is transferred from glucose
How is cellulose used?####To make cell walls
How are amino acids used by plants?####Make proteins
Other than amino acids, what else is used in production of proteins?####Nitrate ions
What forms is glucose stored as?####lipids and starch
Where are lipids stored in plants?####seeds
Where is starch stored in plants?####roots, stems, leaves
When are starch stores used?####When photosynthesis isn't happening
Give 2 examples of when starch stores are used.####night, winter
What is the required investigation into limiting factors?####Effect of light intensity on rate of
photosynthesis of pondweed
What is the independent variable for the pondweed practical?####light intensity
How is the light intensity changed?####moving the pondweed away from the lamp
How is the light intensity measured? (in this practical)####cm away from the lamp
What is the dependent variable in the pondweed practical?####rate of photosynthesis
How is the rate of photosynthesis measured? (in this practical)####bubbles of CO2 released per
minute
What are the control variables for the pondweed practical?####temperature, measuring period,
lamp, pondweed
What is the relationship between light intensity and distance?####light intensity α 1/ d²
respiration####the process of transferring energy from the break down of glucose
Where does respiration happen?####mitochondria
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