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Bio 101 - Chapter 07 - Photosynthesis
Chapter 7 - Photosynthesis
25
Biology
Undergraduate 1
06/22/2016

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Term
What is the order of events that would occur in the production of ATP fueled by the energy collected by photosystem 2?
Definition
1. Electrons pass along the electron transport chain
2. Hydrogen ion gradient is established
3. Hydrogen ions flow through ATP synthase
Term
What are the advantages of the C4 pathway over the C3 pathway?
Definition
Photorespiration does not occur in C4 plants.
The C4 pathway allows a plant to close its stromata for longer periods.
The C4 pathway increases photosynthesis at high temperatures.
Term
Photosystem I
Definition
A molecular complex that uses light energy to reduce NADP+ and NADPH
Term
Electron Transport Chain
Definition
Carries electrons from PSII to PSI via redox reactions
Term
The major inputs of the light reactions of photosynthesis include:
Definition
ADP, NADP+, and H2O
Term
G3P is the product of the Calvin cycle and the first reactant in many metabolic reactions ina plant cell leading to the production of:
Definition
Amino acids, sucrose, fatty acids, and glucose phosphate
Term
_____ is the product of the Calvin cycle and the first reactant in many metabolic reactions in a plant cell.
Definition
G3P
Term
What is the function of photosystme I?
Definition
Form NADPH
Term
True or false: Oxygen can only be used as a substrate instead of carbon dioxide in photorespiration.
Definition
True
Term
_____ functions as a coenzyme that transports electrons during photosynthesis.
Definition
NADP+
Term
The six-carbon molecule resulting from carbon-dioxide fixation immediately breaks down to form __________.
Definition
2, three-carbon 3PG molecules
Term
CO2 fixation occurs when CO2 combines with _____.
Definition
ribulose bisphosphate
Term
he energy and electrons needed for carbohydrate synthesis during the Calvin Benson Cycle are supplied by:
Definition
NADPH and ATP
Term
About 20-50% of the protein content in chloroplasts is _____, which speeds up CO2 fixation.
Definition
RuBP carboxylase
Term
Five molecules of PGAL are used to produce _____ so that the Calvin cycle can continue.
Definition
RuBP
Term
Photosynthetic pigments are clustered together to form photosystems in the stroma of the chloroplasts
Definition
False
Term
The light reactions occur in the stroma.
Definition
false
Term
The ADP and NADP created by the energy-fixing reactions are used in the carbon-fixing reactions.
Definition
false
Term
Inputs of Photosystem 2
Definition
water and light
Term
Output of Photosystem 2
Definition
oxygen, H+, ATP, electrons
Term
input of photosystem 1
Definition
e- and light
Term
Output of photosystem 1
Definition
NADPH
Term
What does the reduction step of the Calvin Cycle involve?
Definition
PGA to PGAL
Term
How many carbon dioxide molecules are used at the start of the Calvin Cycle?
Definition
3
Term
What is cycled through the Calvin Cycle?
Definition
RuBP
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