BIOLOGY UNIT 6: Plant structures and Their Functions | 96 Questions and Answers(A+ Solution guide)

Where do green plants and algae get their energy from? - The sun What are the products of photosynthesis? - Oxygen and glucose What are the reactants of photosynthesis? - Carbon dioxide and water Where does photosynthesis take place? - The chloroplasts How are chloroplasts adapted to photosynthesise? -They contain chlorophyll which absorbs light What type of reaction is photosynthesis? - Endothermic What are the potential limiting factors that affect photosynthesis? - Light intensity, concentration of CO2 and temperature What is the average temperature that enzymes denature? - 45 How do low temperatures affect photosynthesis? - If the temperature is too low the enzymes needed for photosynthesis work more slowly How do high temperatures affect photosynthesis? - If the temperature is too hot the enzymes needed for photosynthesis will become denatured How does increasing light intensity affect photosynthesis? - 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 factorWhat is the relationship between distance and light intensity? - The square of the distance from the lamp and the light intensity are inversely proportional