Chapter 7 Flashcards
What is a photosystem?
Consists of a pigment complex (molecules of chlorophyll a and b and the carotenoids) and electron acceptor molecule within the thylakoid membrane
What is a electron transport chain?
A series of carriers that pass electrons from one to the other
a process in a cell that involves the passage of electrons along a series of membrane-bound electron carrier molecules from a higher to lower energy level; the energy released is used for the synthesis of ATP
What is chemiosmosis?
A process by which mitochondria and chloroplasts use the energy of an electron chain to create a hydrogen ion gradient to drive ATP formation
What are the products that G3P (glyceraldehyde-3-phosphate) can be converted into?
Fatty acids and glycerol to make plant oils, glucose phosphate (simple sugar), fructose (glucose=sucrose), starch and cellulose, amino acids
Photorespiration
Series of reactions that occurs in plants when carbon dioxide levels are depleted but oxygen continues to accumulate, and the enzyme RuBP carboxylase fixes oxygen instead of CO2.
What is a C3 plant?
A plant that fixes carbon dioxide via Calvin cycle
What is a C4 plant?
A plant that fixes CO2 to produce a C4 molecule that releases CO2 to the Calvin cycle
What are the reactants for the Calvin Cycle?
CO2, ATP, and NAPH
What are the major inputs of the light reaction of photosynthesis?
Solar energy, H2O, NADP+, and ADP
What products of the light reactions are used as reactants in the Calvin cycle?
NADPH and ATP
What are products of the light reactions?
ATP and NADPH
What are products of the light reactions?
ATP and NADPH
What is photosystem II
A molecule complex that uses light energy to oxidize water molecules
What is photosystem I
A molecular complex that uses light energy to reduce NADP+ to NADPH
What molecules are needed for the reduction of 3PG to G3P?
ATP and NADPH
