BIOLOGY UNIT 6: Exam 2026
Questions and Answers
Where do green plants and algae get their energy from? - Answer -The sun
What are the products of photosynthesis? - Answer -Oxygen and glucose
What are the reactants of photosynthesis? - Answer -Carbon dioxide and water
Where does photosynthesis take place? - Answer -The chloroplasts
How are chloroplasts adapted to photosynthesise? - Answer -They contain
chlorophyll which absorbs light
What type of reaction is photosynthesis? - Answer -Endothermic
What are the potential limiting factors that affect photosynthesis? - Answer -Light
intensity, concentration of CO2 and temperature
What is the average temperature that enzymes denature? - Answer -45
How do low temperatures affect photosynthesis? - Answer -If the temperature is
too low the enzymes needed for photosynthesis work more slowly
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, How do high temperatures affect photosynthesis? - Answer -If the temperature is
too hot the enzymes needed for photosynthesis will become denatured
How does increasing light intensity affect photosynthesis? - Answer -At first as
light levels increase the rate of photosynthesis also increases steadily (the rate is
directly proportional to light intensity) but this is only true up to a certain point.
Beyond that increasing the light intensity won't make a difference - it'll be either
the temperature or CO2 levels that will be the limiting factor
What is the relationship between distance and light intensity? - Answer -The
square of the distance from the lamp and the light intensity are inversely
proportional
How does the inverse square law apply to distance and light intensity? - Answer -
Light intensity decreases in proportion to the square of the distance
What is the equation that links distance and light intensity? - Answer -Light
intensity = 1/distance2
How do low levels of carbon dioxide affect photosynthesis? - Answer -If there are
low levels of carbon dioxide the rate of photosynthesis will decrease as CO2 is one
the raw materials needed for photosynthesis
What chemical can release CO2? - Answer -Sodium hydrogencarbonate
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Questions and Answers
Where do green plants and algae get their energy from? - Answer -The sun
What are the products of photosynthesis? - Answer -Oxygen and glucose
What are the reactants of photosynthesis? - Answer -Carbon dioxide and water
Where does photosynthesis take place? - Answer -The chloroplasts
How are chloroplasts adapted to photosynthesise? - Answer -They contain
chlorophyll which absorbs light
What type of reaction is photosynthesis? - Answer -Endothermic
What are the potential limiting factors that affect photosynthesis? - Answer -Light
intensity, concentration of CO2 and temperature
What is the average temperature that enzymes denature? - Answer -45
How do low temperatures affect photosynthesis? - Answer -If the temperature is
too low the enzymes needed for photosynthesis work more slowly
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, How do high temperatures affect photosynthesis? - Answer -If the temperature is
too hot the enzymes needed for photosynthesis will become denatured
How does increasing light intensity affect photosynthesis? - Answer -At first as
light levels increase the rate of photosynthesis also increases steadily (the rate is
directly proportional to light intensity) but this is only true up to a certain point.
Beyond that increasing the light intensity won't make a difference - it'll be either
the temperature or CO2 levels that will be the limiting factor
What is the relationship between distance and light intensity? - Answer -The
square of the distance from the lamp and the light intensity are inversely
proportional
How does the inverse square law apply to distance and light intensity? - Answer -
Light intensity decreases in proportion to the square of the distance
What is the equation that links distance and light intensity? - Answer -Light
intensity = 1/distance2
How do low levels of carbon dioxide affect photosynthesis? - Answer -If there are
low levels of carbon dioxide the rate of photosynthesis will decrease as CO2 is one
the raw materials needed for photosynthesis
What chemical can release CO2? - Answer -Sodium hydrogencarbonate
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
