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BIO

QuestionAnswer
absorbs blue and green light carotenoids
adds phosphate to ADP ATP synthase
cluster of pigment molecules Photosystem
three-carbon molecule in Calvin Cycle PGAL
five-carbon carbohydrate in Calvin Cycle RuBP
components colors of white light visible spectrum
absorbs violet, blue, and red light chlorophylls
biochemical pathway series of linked chemical reactions
(TF) Light of different wavelengths is different colors TRUE
(TF) High-energy electrons move along the thylakoid membrane from photo system 1 to photosystem 2 FALSE High-energy electrons move along the thylakoid membrane from photo system 2 to photosystem 1
(TF) The oxygen atoms in the oxygen gas produced in photosynthesis come from carbon dioxide FALSE The oxygen atoms in the oxygen gas produced in photosynthesis come from water
(TF) Compounds that can be produced from products of the Calvin Cycle include amino acids, lipids, and carbohydrates TRUE
(TF) C4 plants differ from C3 plants in that they do not use the Calvin Cycle for carbon fixation FALSE C4 plants differ from C3 plants in that they use the Calvin Cycle for carbon fixation
What product of the light reactions of photosynthesis is released and does not participate further in photosynthesis? Oxygen
Where does the energy required for the Calvin Cycle originate? ATP and NADPH produced by the light reactions
Protons are moved into the thykaloid using energy from? electrons in the transport chain
Carbon atoms are fixed into organic compounds in? the Calvin Cycle
To produce the same amount of carbohydrates, C4 plants require less Carbon dioxide than C3 plants
Which of the following environmental factors will cause a rapid decline in the photosynthesis rate if the factor rises above a certain level? temperature
In the diagram below of a chloroplast, the light reactions would occur in area? garnum (stack of thykaloid)
In the diagram at right of a chloroplast, the reactions of the Calvin Cycle would occur in area? inner membrane
Describe the internal structure and the external structure of a chloroplast Each chloroplast is surrounded by a pair of membranes. Inside the inner membrane is a system of membranes arranged as flattened sacs called thylakoids. Thylakoids are layered in stacks called grana, and they are surrounded by a solution called the stroma.
What happens to the components of water molecules that are split during the light reactions of photo synthesis? Four electrons become available to replace those lost by chlorophyll molecules in photosystem II. Hydrogen ions remain inside the thylakoid, while oxygen diffuses out of the chloroplast.
How is ATP formed in photosynthesis? Energy from electrons is used to pump a high concentration of protons into the thylakoid. These protons then flow into the stroma and down their concentration gradient, driving the conversion of ADP into ATP, which is catalyzed by ATP synthase.
What is the fate of the PGAL, molecules in the third step of the Calvin cycle? What happens to the remaining PGAL molecules? Most of the PGAL is converted back into RuBP, but some PGAL is used to make organic compounds.
How do CAM plants differ from C4 and C3 plants? How does this difference allow CAM plants to exist in hot, dry conditions? CAM plants take in carbon dioxide at night and release it into the Calvin cycle during the day. CAM plants lose less water than either C3 or C4 plants.
Photosynthesis is said to be "saturated" at a certain level of CO2, What does this mean? It means that the rate of photosynthesis cannot be increased by increasing the CO2 concentration above a certain level.
Created by: 1806123330
 

 



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