Chapter 8.2 Photosynthesis Flashcards
What is a pigment?
Light-absorbing molecules that capture energy from sunlight in plants. Chlorophyll (a and b) as well as Carotenoids are the most common examples.
What is chlorophyll?
The plants main pigment which absorbes most of the wavelengths of light in the visible light spectrum besides green and yellow, which bounce off giving the appearance of green to us.
What is a Thylakoid?
Saclike membranes found inside of a chloroplast which contain the pigments for photosynthesis.
What is the stroma?
The liquid area found inside of a chloroplast, surrounding the saclike thylakoids.
What is NADP+ ?
(Nicotinamide Adenine Dinucleotide Phosphate) is an energy carrier compound which can accept a Hydrogen Ion (H+) and 2 high energy electrons (2e-) to form the higher energy NADPH. This is a product of the light-dependent reactions and is used as a source of energy needed for the light-independent reactions (Calvin Cycle).
What are the Light-Dependent Reactions?
The (L-D Rxn’s) Light-Dependent Reactions are the reactions that require the input of energy from the sun and the presence of water and produce oxygen, NADPH, and ATP.
The first set of reactions that require the direct involvement of energy from sunlight.
What are the Light-Independent Reactions?
The (L-I Rxn’s) Light-Independent Reactions are reactions that do not require input from the sun in order to use the reactant of carbon dioxide and the energy carriers NADPH and ATP to produce sugar in the form of glucose.
What role to pigments play in the process of photosynthesis?
Photosynthetic organisms capture energy from sunlight with pigments
What are electron carrier molecules?
An electron carrier molecule is a compound that can accept a pair of high-energy electrons and transfer them, along with most of their energy, to another molecule.
Examples include:
NADP+ + H+ + 2e- —-> NADPH
ADP + Phosphate Group+ + 2e- —–> ATP
What are the reactants and products of photosynthesis?
Photosynthesis uses the energy of sunlight to convert water and carbon dioxide (reactants) into high-energy sugars and oxygen (products).
What is the reactant of the Light-Independent Reactions?
Carbon Dioxide (CO2)
What is the product of the Light-Independent Reactions?
(C6H12O6) glucose sugar
What is the reactant of the Light-Dependent Reaction?
Water (H2O)
What is the product of the Light-Dependent Reaction?
Oxygen (O2)
