C1.3 - Photosynthesis Flashcards
What is the primary pigment involved in photosynthesis?
Chlorophyll.
What are carotenoids?
Accessory pigments in plants that assist in photosynthesis.
What is the primary pigment in plants?
Chlorophyll a.
How can photosynthetic pigments be separated?
Using chromatography techniques.
What does the action spectrum of photosynthesis show?
The effectiveness of different wavelengths of light in driving photosynthesis, peaking in blue and red regions.
What role do photosynthetic organisms play in rock deposition?
They contribute to the formation of sedimentary rocks like limestone.
What is photolysis of water?
The process where water is split into hydrogen ions, electrons, and oxygen using light energy: $$2H_2O \xrightarrow{\text{light}} 4H^+ + 4e^- + O_2$$.
What is the optimal condition for photosynthesis related to temperature?
It follows a typical enzyme-temperature relationship.
What is the global impact of photosynthesis on the atmosphere?
It has created an oxygen-rich atmosphere over billions of years.
Why is understanding photosynthesis important?
It is crucial for comprehending broader ecological and environmental concepts.
How does photosynthesis affect ocean chemistry?
It influences pH levels and carbon content in oceans.
What are the products of the light-dependent reactions?
ATP and NADPH.
What is the overall equation for photosynthesis?
$$6CO_2 + 6H_2O + \text{light energy} \rightarrow C_6H_{12}O_6 + 6O_2$$
What factors can limit the rate of photosynthesis?
Light intensity, carbon dioxide concentration, and temperature.
What wavelengths of light does chlorophyll absorb most effectively?
Red light (650-700 nm) and blue light (400-500 nm).
What color light is largely reflected by chlorophyll?
Green light (500-600 nm).
What is photosynthesis?
A biological process that converts light energy into chemical energy, forming the basis of most ecosystems.
How does light intensity affect photosynthesis?
Increases the rate until another factor becomes limiting.
What is the Calvin cycle?
The light-independent reactions that use ATP and NADPH to convert CO₂ into glucose.
