• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
11/6/11 10:49 PM Metabolism Poster Questions: Answer the
11/6/11 10:49 PM Metabolism Poster Questions: Answer the

... 31. After an electron is removed from the chlorophyll a molecule in the photosystem, how is it replaced in photosystem I and in photosystem II? Photosystem II: Oxygen evolving complex steals an electron from water, replenishing the electron and creating oxygen I: gets it from P.S. II or itself, cycl ...
Photosynthesis - World of Teaching
Photosynthesis - World of Teaching

... Overview • All energy on earth comes from the sun. • We depend on: – Plants – Algae (underwater plants) – Cyanobacteria (photosynthetic bacteria) • To provide this energy to us! ...
Photosynthesis Quiz
Photosynthesis Quiz

... electrons are fused to form ATP glucose is produced carbon fixation occurs ...
Photosynthesis
Photosynthesis

... • Occurs in two main phases. – Light reactions – Dark reactions, or Light-Independent reactions (aka – the Calvin Cycle) • Light reactions are the “photo” part of photosynthesis. Light is absorbed by pigments. • Dark reactions are the “synthesis” part of photosynthesis. Trapped energy from the sun i ...
Bioenergetic Reactions
Bioenergetic Reactions

... Chlorophyll is a pigment found in the chloroplasts of plant cells. Chlorophyll A is the most important pigment in plants – responsible for the green color. It reflects green and absorbs other wavelengths. That means chlorophyll absorbs a lot more light than it reflects, which is a good thing! ...
lecture 3 -photosynthesis
lecture 3 -photosynthesis

... bacteria, purple sulfur bacteria) photosynthesis occurs in stacked membranes • While organelle called the chloroplast conducts photosynthesis for eucaryotes (algae, plants) ...
Photosynthesis - World of Teaching
Photosynthesis - World of Teaching

... Overview • All energy on earth comes from the sun. • We depend on: – Plants – Algae (underwater plants) – Cyanobacteria (photosynthetic bacteria) • To provide this energy to us! ...
Photosynthesis
Photosynthesis

... Electron transport chain Hydrogen atoms from reduced coenzymes are transferred by electron transport chain enzymes, (flavoproteins, coenzyme Q, cytochromes located in inner mitochondria membrane. Cytochromes hand on electrons and energy, which are released during red-ox processes. There is used the ...
Electron Transport Chain (1)
Electron Transport Chain (1)

... - The big purple proteins that are connected are multiprotein complexes - When the electron finishes the journey at the last protein complex, the 2 electrons from NADH or FADH2 comes out, combining 2H+ (+) ½ O2, which makes water or H2O - That makes high concentration of H+ in the cristae - That mak ...
it here
it here

... ○○ When a photon hits a chlorophyll molecule, the energy is transferred to 2 electrons exciting them –– “Photoionisation” ○○ Electrons captured by electron carriers and passed along a series of electron carriers ○○ Energy is used to pump protons across the thylakoid membranes ○○ Proton gradient is f ...
Blue Flashcards (CR) - mvhs
Blue Flashcards (CR) - mvhs

... protein that works passively through chemiosmosis. As ___ moves through the protein from _____________ to ________________, the protein’s parts turn like gears. Each turn results in _____ and ___ becoming _____. ...
Photosynthesis
Photosynthesis

... 4. Electrons from the primary electron acceptor pass through the electron transport chain (transport proteins) to PS I. As the electrons move through, they lose energy. This energy is used to phosphorylate ADP to form ATP molecules. (2 electrons yield about 1.5 ATPs) 5. Once in PS I, the electrons a ...
8-3 worksheet
8-3 worksheet

... ________________ and ______________ 8. Where do these carrier molecules get their energy? ________________________________________________________ ...
Chem 101A Exam 4 Concepts Chapter 7 – Modern Atomic Theory
Chem 101A Exam 4 Concepts Chapter 7 – Modern Atomic Theory

... Chem 101A Exam 4 Concepts  Chapter 7 – Modern Atomic Theory   Use formulas that relate energy of photon, frequency, wavelength, speed of light, and the Rydberg  Equation   Notable scientists and their contributions: Rutherford, Bohr, Planc, de Broglie, Heisenberg,  Schrödinger.   The four Quantum ...
Lecture 29
Lecture 29

... Val E11 out of the oxygen’s path to the Fe on the other subunit. This process increases the affinity of the heme toward oxygen. The a1-b2 contacts have two stable positions . These contacts, which are joined by different but equivalent sets of hydrogen-bonds that act as a binary switch between the T ...
WHAT IS PHOTOSYNTHESIS?
WHAT IS PHOTOSYNTHESIS?

... The process begins when one molecule of carbon dioxide is captured by means of the enzyme RuBisCO for attachment to 1 molecule “ribulose 1,5-bisphosphate” (RuBP) which is a 5-carbon sugar using electron energy of ATP molecules and and indirectly NADPH2 photons of light energy, generating unstable 6 ...
Plant cells, tissues and the chloroplast
Plant cells, tissues and the chloroplast

... What is photosynthesis? All life on Earth depends on photosynthesis. The process is described by the following word and symbol equations: carbon + water dioxide ...
Anaerobic Respiration
Anaerobic Respiration

... electron acceptor is reduced and used as the source of nutrient for cell growth. Dissimilative metabolism: A large amount of the electron acceptor is reduced for energy and the reduced product is excreted into the environment. ...
NAME HONORS PHOTOSYNTHESIS Chapter 8 VOCAB QUIZ
NAME HONORS PHOTOSYNTHESIS Chapter 8 VOCAB QUIZ

... ________ compound other than chlorophyll that absorbs light at different wavelengths than chlorophyll; includes the yellow, red, orange pigments seen in fall leaves ________ region surrounding the thylakoid membranes inside a chloroplast ...
Photosynthesis
Photosynthesis

... Phase 1: CO2 is incorporated, called ‘carbon fixation’  Phase 2: phosphorylation, ATP spent, efrom NADPH reduce the C chain so it stores more potential energy  6 molecules with 3 C are made – 5 are recycled and one is released as a future glucose  Phase 3: cycles ...
Electron Transport
Electron Transport

... thylakoid membrane. This series of molecules is called the electron transport chain, because it transfers electrons from one molecule to the next in series. As the electrons pass from molecule to molecule in the electron transport chain, they lose most of the energy that they acquired when they were ...
CHM 101
CHM 101

... How many molecules of oxygen are required to form 24.0 g of water based on the above reaction? ...
L3_bacterial metabolismCh6HO
L3_bacterial metabolismCh6HO

... Types of Bacterial Metabolism ...
Week 4
Week 4

... • See Figure 13-10 • Syn. Respiratory chain • embedded in inner membrane of mitochondrion • composed of 3 large complexes – NADH dehydrogenase – cytochrome b-c1 – cytochrome oxidase ...
Week 4
Week 4

... • See Figure 13-10 • Syn. Respiratory chain • embedded in inner membrane of mitochondrion • composed of 3 large complexes – NADH dehydrogenase – cytochrome b-c1 – cytochrome oxidase ...
< 1 ... 273 274 275 276 277 278 279 280 281 ... 286 >

Light-dependent reactions

In photosynthesis, the light-dependent reactions take place on the thylakoid membranes. The inside of the thylakoid membrane is called the lumen, and outside the thylakoid membrane is the stroma, where the light-independent reactions take place. The thylakoid membrane contains some integral membrane protein complexes that catalyze the light reactions. There are four major protein complexes in the thylakoid membrane: Photosystem II (PSII), Cytochrome b6f complex, Photosystem I (PSI), and ATP synthase. These four complexes work together to ultimately create the products ATP and NADPH.[.The two photosystems absorb light energy through pigments - primarily the chlorophylls, which are responsible for the green color of leaves. The light-dependent reactions begin in photosystem II. When a chlorophyll a molecule within the reaction center of PSII absorbs a photon, an electron in this molecule attains a higher energy level. Because this state of an electron is very unstable, the electron is transferred from one to another molecule creating a chain of redox reactions, called an electron transport chain (ETC). The electron flow goes from PSII to cytochrome b6f to PSI. In PSI, the electron gets the energy from another photon. The final electron acceptor is NADP. In oxygenic photosynthesis, the first electron donor is water, creating oxygen as a waste product. In anoxygenic photosynthesis various electron donors are used.Cytochrome b6f and ATP synthase work together to create ATP. This process is called photophosphorylation, which occurs in two different ways. In non-cyclic photophosphorylation, cytochrome b6f uses the energy of electrons from PSII to pump protons from the stroma to the lumen. The proton gradient across the thylakoid membrane creates a proton-motive force, used by ATP synthase to form ATP. In cyclic photophosphorylation, cytochrome b6f uses the energy of electrons from not only PSII but also PSI to create more ATP and to stop the production of NADPH. Cyclic phosphorylation is important to create ATP and maintain NADPH in the right proportion for the light-independent reactions.The net-reaction of all light-dependent reactions in oxygenic photosynthesis is:2H2O + 2NADP+ + 3ADP + 3Pi → O2 + 2NADPH + 3ATPThe two photosystems are protein complexes that absorb photons and are able to use this energy to create an electron transport chain. Photosystem I and II are very similar in structure and function. They use special proteins, called light-harvesting complexes, to absorb the photons with very high effectiveness. If a special pigment molecule in a photosynthetic reaction center absorbs a photon, an electron in this pigment attains the excited state and then is transferred to another molecule in the reaction center. This reaction, called photoinduced charge separation, is the start of the electron flow and is unique because it transforms light energy into chemical forms.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report