Week Five: Energy and Photosynthesis Flashcards
Exergonic
gives off energy
Endergonic
requires energy
What is the first law of thermodynamics?
Energy cannot be created nor destroyed, only transferred
What is the second law of thermodynamics?
Heat does not naturally flow from a cold body to a warmer body
Heterotrophs
Consumers: They do not produce its own food.
Autotrophs
Producers: Organism produces its own food. (ex. plants)
What wavelengths of light in the visible spectrum do plants use in photosynthesis?
The region between 400 nm and 700 nm is what plants use to drive photosynthesis and is typically referred to as Photosynthetically Active Radiation (PAR).
Where does gas exchange occur in plants?
The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata.
What happens in the light reactions of photosynthesis? Where do they occur?
The light reaction is the process where the plant absorbs sunlight for the production of two molecules such as ATP and NADH. The light-dependent reaction takes place in the thylakoid membrane present in the chloroplast. The light reaction initiates only in the presence of sunlight
What is the balanced chemical equation for photosynthesis?
6CO2+6H2O→C6H12O6+6O2
What happens in the Calvin Cycle of photosynthesis? Where does the Calvin Cycle occur?
This process is fueled by, and dependent on, ATP and NADPH from the light reactions. Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma (the inner space of chloroplasts).
