BIOL2000 Lecture Notes - Lecture 15: Ferredoxin, Plastoquinone, Thylakoid

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plumbutterfly939

28 Oct 2015

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Photosynthesis is a redox reaction: carbon dioxide + water --> carbohydrates + oxygen. Electron donor & reducing agent: water: energy: sun light, photosynthetic electron transport chain. Movement of electrons through this transport chain is used to drive the synthesis of atp and nadph iii. Atp and nadph are energy sources needed to synthesize carbohydrates using co2 in the calvin cycle. The evolutionary history of photosynthesis includes both horizontal gene: photosynthetic organisms with a single photosystem must use more easily oxidized compounds, such as h2s, as electron donors i. Do not produce oxygen: all the oxygen in the atmosphere results from photosynthesis by organisms containing two photosystems: cyanobacteria, horizontal gene transfer: transfer of genetic material between organisms that are not parent and offspring. The photosynthetic electron transport chain takes place on specialized: chloroplasts. Lumen: a fluid-filled compartment enclosed by thylakoid membrane. Stroma: region surrounding the thylakoid membrane i. ii. i. ii. i. ii. i. ii. i. ii.

Related Questions

Photosynthesis (Ch 8)

List the locations of the light reactions & the Calvincycle within the chloroplast and identify location on adiagram
Use the absorption spectrum of a pigment to identifywavelengths absorbed and reflected by that pigment
Describe the events of the light reactions including:

Excitation of electrons vs donation of electrons
Pathway of excited electrons through photosystem II, firstelectron transport chain, photosystem I and 2^nd electrontransport chain
Sources of electrons in photosystems I and II
ATP production using energy from an electron transportchain

List the products of the light reactions
Explain the indirect role of light reactions vs direct role ofCalvin cycle reactions in sugar production
Describe Calvin cycle events

Carbon fixation
Regeneration of CO₂ acceptor molecule (RuBP)

Explain the function of the Calvin cycle in plant cellularmetabolism
Compare & contrast electron transport and ATP synthesisbetween cellular respiration and photosynthesis

cerisegoldfish403

What type of organisms are responsible for the production of most of the oxygen on Earth?

What molecule is the source of the electrons in the electron transport chain?

What molecule is the source of the oxygen that is released as a byproduct of photosynthesis?

Which of the following is the same thing as a proton?

What molecule is the source of the protons that are used to establish the proton gradient?

What molecule does the electron end up in at the end of the two light reactions (i.e. After Photosystems II and I)?

What is the proton gradient used for?

What does the term âcarbon fixationâ refer to?

During the light-independent reactions, the Calvin Cycle requires NADPH and ATP. Where does the cell get these molecules?

The product of the light-independent reactions is a molecule called G3P. What does the cell use it for?

What is the overall functiono of photosynthesis; why do cells perform this process?

ambergerbil900

1. All of the following are correct descriptions of photosynthesis except:

A) The Calvin Cycle is endergonic.

B) Electrons are supplied to the reaction center via the splitting of water, which yields O2 as a byproduct

C) Chlorophyll and accessory pigments capture energy from the sun in the form of electrons, which they use to drive the electron transport chains of photosystems I and II.

D) ATP and NADPH generated in the light-dependent reactions are used to power CO2 fixation via the Calvin cycle in the light-independent reactions.

2. In glycolysis and the TCA cycle, glucose is _____ down to CO2; this process _____ lots of ATP and reducing power. In photosynthesis, CO2 is ______ back to sugar by the _______ of lots of ATP and reducing power.

A) reduced; requires; oxidized; production

B) oxidized; requires; reduced; production

C) oxidized; produces; reduced; input

D) reduced; produced; oxidized; input

3. Which description accurately compares cellular respiration and photosynthesis?

A) Photosynthesis uses energy captured from sunlight to power the reduction of carbon dioxide to sugars; cellular respiration oxidizes sugars to yield energy for the cell.

B) The ATP produced via cellular respiration is needed to power the reactions of photosynthesis

C) The pathways of photosynthesis are those of cellular respiration run in reverse.

D) Photosynthesis captures energy from sunlight to oxidize carbon dioxide to sugars; cellular respiration reduces these sugars to yield energy for the cell.

BIOL2000 Lecture Notes - Lecture 15: Ferredoxin, Plastoquinone, Thylakoid

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