Photosynthesis (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What is a limiting factor in photosynthesis?
What is a limiting factor in photosynthesis?
An environmental condition restricting rate when in short supply
Which are the three main limiting factors of photosynthesis?
Which are the three main limiting factors of photosynthesis?
Light intensity, temperature, CO₂
Which wavelengths do chlorophyll a, chlorophyll b and carotene mainly absorb?
Which wavelengths do chlorophyll a, chlorophyll b and carotene mainly absorb?
Red and blue light
What is the optimum temperature for photosynthesis in most temperate plants?
What is the optimum temperature for photosynthesis in most temperate plants?
Around 25°C
What percentage of atmospheric gases does carbon dioxide make up?
What percentage of atmospheric gases does carbon dioxide make up?
0.04%
What happens to enzymes above 45°C during photosynthesis?
What happens to enzymes above 45°C during photosynthesis?
They start to denature
What occurs after the saturation point for light intensity is reached?
What occurs after the saturation point for light intensity is reached?
Other factors become limiting
How do glasshouses enrich CO₂ for increased photosynthesis?
How do glasshouses enrich CO₂ for increased photosynthesis?
Small propane heaters or CO₂ generators
According to the Law of Limiting Factors, what determines the overall photosynthesis rate?
According to the Law of Limiting Factors, what determines the overall photosynthesis rate?
The single factor that is too low or high
On a graph, what does levelling off indicate about photosynthesis?
On a graph, what does levelling off indicate about photosynthesis?
A limiting factor has been reached