Photosynthesis & Water Potential

Front

What role does water play in the process of photosynthesis?

Back

Water provides electrons and protons for photosynthesis and is a source of oxygen.

Front

Calculate the water potential of a solution with a solute potential of -2.5 bars and a pressure potential of 0.9 bars.

Back

-1.6 bars

Front

What are the two products of the light reactions that are needed for the Calvin cycle?

Back

NADPH and ATP

Front

An animal cell in an open container has a solute potential of -4.4 bars. What is its overall water potential?

Back

-4.4 bars

Front

What are absorption and action spectra, and how do they differ?

Back

Absorption spectra show absorbed wavelengths; action spectra show effectiveness of wavelengths in biological processes.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water.

Front

What is the equation for photosynthesis?

Back

6CO2 + 6H2O + light energy → C6H12O6 + 6O2

Front

What is solute potential?

Back

Solute potential is the measure of the tendency of water to move by osmosis, influenced by the concentration of solutes in a solution.

Front

What is pressure potential?

Back

Pressure potential is the physical pressure on a solution, which can affect the overall water potential.

Front

How do you calculate water potential?

Back

Water potential (Ψ) = Solute potential (Ψs) + Pressure potential (Ψp)