ScienceBiologyBio: Photosynthesis BioInteractive
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Bio: Photosynthesis BioInteractive

Uria Lee avatar Uria Lee
25 July 2022
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36 test answers

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Plants, Algae, & some bacteria.
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Which kinds of organisms do photosynthesis?
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To capture light energy from the sun & convert it to chemical energy in a series of reactions, which is then stored for later use.
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What is the overall purpose of photosynthesis?
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Sun, Carbohydrates, Oxygen, Water, Carbon Dioxide.
Sun, Carbohydrates, Oxygen, Water, Carbon Dioxide.
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In diagram 1, note photosynthesis's main inputs of matter & energy.
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Chemical reactions, Light, Chemical.
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Photosynthesis is a set of ___ in which ___ energy is converted to ___ energy.
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H2O, CO2 , Energy input, Carbohydrates, O2, Electron donor, Electron acceptor, G3P
H2O, CO2 , Energy input, Carbohydrates, O2, Electron donor, Electron acceptor, G3P
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In diagram 2, note the labels.
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The thylakoid membranes of chloroplasts
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In what plant structure does photosynthesis occur? Be specific.
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CO2 in, O2 out, stomata
CO2 in, O2 out, stomata
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In diagram 3, note the labels.
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The vascular bundle (or plumbing system) transports organic molecules from the leaf to other parts of the plant.
The vascular bundle (or plumbing system) transports organic molecules from the leaf to other parts of the plant.
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What structure is used to transport organic molecules from the leaf to other other parts of the plant?
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Chloroplasts have a green pigment (chlorophyll) that reflects green, making plants green.
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Why are leaves green?
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thylakoid & stroma locations
thylakoid & stroma locations
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In diagram 4, note the labels & locations.
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ATP, NADPH, O2, CO2, G3P
ATP, NADPH, O2, CO2, G3P
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In diagram 5, note the labels that show the connections between the light reactions & the Calvin cycle.
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It increases as a result of photosynthesis when it creates new organic molecules.
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How does a plant increase its biomass?
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They transform light energy to chemical energy by exciting electrons & then moving them from molecule to molecule (like a chain) on the thylakoid membranes.
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What is the function of the photosystems?
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PSI, PSII, ATP Synthase, & electron transport chain
PSI, PSII, ATP Synthase, & electron transport chain
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Label everything in diagram 6.
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A: Photons enter and go to the chlorophyll; water also enters and goes to the chlorophyll. A: Electrons in the chlorophyll are excited to a higher energy level & the energy is transferring further into the reaction.
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PSII Q: What is happening with matter? Q: What is happening with energy?
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A: The CC transports additional protons (H+) into the lumen. A: The CC uses the energy in the energy in the electrons, the electrons have lost most of their energy from bringing in the protons (H+).
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Cytochrome Complex Q: What is happening with matter? Q: What is happening with energy?
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A: Photons enter the chlorophyll. A: The electrons in the chlorophyll get excited to a higher energy level again & get used sending the chlorophyll out.
A: Photons enter the chlorophyll. A: The electrons in the chlorophyll get excited to a higher energy level again & get used sending the chlorophyll out.
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PSI Q: What is happening with matter? Q: What is happening with energy?
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1) Chlorophyll of PSI 2) ATP Synthase
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At the end of the electron transport chain, where is the light energy that was absorbed and converted by chlorophyll stored? (2 answers)
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The potential energy of the proton gradient is used to combine ADP and P to make ATP.
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Describe how the proton (H+) gradient is used to make ATP.
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1) ATP 2) NADPH
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What 2 molecules bring chemical energy from the light reactions to the next stage of photosynthesis, the Calvin cycle?
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Phase 1: Carbon Fixation Phase 2: Reduction Phase 3: Regeneration
Phase 1: Carbon Fixation Phase 2: Reduction Phase 3: Regeneration
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Label diagram 7 with 3 phases of the Calvin cycle.
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An organic carbon, in the form of CO2, is incorporated into organic molecules.
An organic carbon, in the form of CO2, is incorporated into organic molecules.
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Phase 1, Description
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Rubisco
Rubisco
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Phase 1, What enzyme catalyzes the reaction in this phase?
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The organic molecules accept electrons & molecules of G3P are formed.
The organic molecules accept electrons & molecules of G3P are formed.
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Phase 2, Description
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Molecules of G3P & energy from ATP are used to produce molecules of RuBP.
Molecules of G3P & energy from ATP are used to produce molecules of RuBP.
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Phase 3, Description
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B/c it continues on and on, uses the same materials in the same order, repeats itself, & uses some of the left over products.
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Why is the series of reactions in the Calvin cycle called a "cycle"?
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NADPH & ATP
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At the end of the Calvin cycle, what molecules have the energy that originally came from light? (2)
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Sucrose, Starch
Sucrose, Starch
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Glyceraldehyde-3-phosphate (G3P) can be used by plant cells to make ___ & ___.
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Sucrose
Sucrose
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Which molecule in diagram 11 is used to transport energy to other parts of the plant?
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Starch
Starch
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Which molecule in diagram 11 is stored in the plant for later use as an energy source?
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To convert light energy into chemical energy to feed the plant & keep it alive.
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Based on everything you've learned from the animations, what is the overall purpose of photosynthesis?
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O2 is produced when the plant takes in energy from the sun; water and CO2 form carbohydrates which releases O2 over time.
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Describe how oxygen gas (O2) is produced during photosynthesis. Include the specific structures in the plant where the reaction occurs.
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The electron from a molecule of water goes with H+ to ATP Synthase, which then joins the sugar G3P.
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Describe the path of an electron from a molecule of water to the sugar G3P.
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ATP is formed when an electron travels through PSII to the cytochrome complex then to PSI & then to the ATP synthase.
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Describe how ATP is produced in the light reactions.
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Light energy energizes electrons to make ATP & NADPH, which provide energy to produce G3P in the calvin cycle.
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Which of the following statements best explains how the energy in a photon of light is stored in a molecule of the sugar G3P?
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The remaining five G3P molecules help ATP change into 3ADP and 3P before continuing on with the process to make 3RuBP.
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When three molecules of carbon dioxide (Co2) react with three molecules of RuBP during the Calvin cycle, six molecules of the sugar G3P are produced. One G3P molecule exits the Calvin cycle during phase 2. What happens to the other five G3P molecules?