17 Questions
What is the relationship between incident light and CO2 fixation rates at low light intensities?
Linear
At what percentage of full sunlight does light saturation occur?
10%
In which type of plants is light rarely a limiting factor in nature?
Plants in dense forests
What is the optimum temperature range for photosynthesis in higher plants?
30-40°C
Which of the following factors can limit the rate of photosynthesis at high light intensities?
CO2 concentration
What is the primary purpose of photosynthesis in green plants?
Produce glucose and starch
How does water stress affect photosynthesis in plants?
Reduces surface area of leaves
In which part of the plant does photosynthesis primarily take place?
Leaves
How does the temperature affect photosynthesis in C3 and C4 plants differently?
C3 plants are more temperature-sensitive than C4 plants
How does carbon dioxide enrichment impact plant growth in relation to photosynthesis?
Leads to higher yields
Which factor indirectly influences photosynthesis by affecting stomatal behavior and leaf structure?
Water availability
What did Calvin propose in relation to how plants convert light energy to chemical energy?
Transferring an electron in an organised array of pigment molecules
How did Bassham study reactions in green plants regarding sugar formation?
By labelling carbon dioxide with C14
Which pathway earned Calvin a Nobel Prize in 1961?
Mapping the pathway of carbon assimilation in photosynthesis
What term is used to describe green plants that can make their own food through photosynthesis?
Autotrophs
In photosynthesis, where is the electron transferred according to Calvin's proposal?
In an organised array of pigment molecules
What do all animals, including human beings, depend on plants for?
Their food
Explore how plants benefit from carbon dioxide enrichment and the temperature sensitivity of dark reactions in photosynthesis. Learn about the temperature optima for C3 and C4 plants and how it affects their photosynthetic rate.
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