Lecture 3 - Photosynthesis pt. 2 Flashcards
3 Major reactions in the Calvin cycle
Fixation or ________ reaction
carboxylation
3 Major reactions in the Calvin cycle
__________ or conversion of sugars to different forms
reduction
3 major reactions in the Calvin cycle
__________ or use of energy to regenerate RUBP
regeneration
Photorespiration
uses ______ ATP and _______ NADPH for every oxygenation of RuBP
5, 3
Photorespiration results in (lower/higher) rate of dry matter production because of (lower/higher) photosynthetic efficiency
lower, lower
Category of plants based on their Carbon fixation pathway
the first stable intermediate has three carbons enter the Calvin cycle directly
C3 plants
example of C3 plants
rice, wheat, soybeans
Category of plants based on their Carbon fixation pathway
first incorporate carbon dioxide into four-carbon compounds before Calvin cycle
C4 plants
example of C4 plants
corn, sugarcane
C4 plants’ Carbon fixation pathway is adaptive, because it enhances carbon fixation under conditions that favor photorespiration, such as ________, ________ environments
hot, arid
C4 pathway is also called _______-_______ pathway because photosynthetic reactions occur in separate cells (________ and ________ ________ cells)
hatch-slack, mesophyll, bundle sheath
Mesophyll cells in C4 plants have an additional enzyme, PEP carboxylase or ________
phosphoenol pyruvate carboxylase
C4 photosynthesis
1) CO2 enters _________ cells
2) PEP is carboxylated to form OAA or ___________ acid
3) OAA is converted to _________
4) Malate is transported to __________ __________ cells through malate pump
5) __________ is released via decarboxylation and enters Calvin cycle
6) Rubisco in the Calvin cycle acts as a ___________ always
mesophyll
ocaloacetic
malate
bundle sheath
CO2
carboxylase
True or False. All plants have both the light-dependent and light-independent reactions
True
CAM pathway meaning
Crassulacean acid metabolism
