• Study Resource
  • Explore
    • 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
4.2 Overview of Photosynthesis
4.2 Overview of Photosynthesis

... (1) Chlorophyll is a molecule that absorbs light energy. (2) Two types of Chlorophyll Chlorophyll a (main pigment) Chlorophyll b (accessory pigment) (2) In plants, chlorophyll is found in organelles called chloroplasts. What do accessory pigments do? They capture the radiant energy that chlorophyll ...
Peroxisomal oxidation of fatty acids
Peroxisomal oxidation of fatty acids

... Thus there will be production of 7 FADH2, 7 NADH molecules during the b-oxidation cycles. ...
Document
Document

... • How did we get from glucose to lactic acid? • In the liver, the process is “reversed” using ATP from aerobic respiration ...
Cellular Respiration
Cellular Respiration

... Cellular Respiration Cellular Energy •The Stages of Cellular Respiration Cellular respiration has two stages. •Glycolysis The first stage of cellular respiration is called glycolysis. •Aerobic and Anaerobic Respiration The second stage of cellular respiration is either aerobic respiration (in the p ...
Getting a good rate of exchange – the mitochondrial ADP
Getting a good rate of exchange – the mitochondrial ADP

... Three repeating units form the closed pore At the narrowest constriction at the base of the carrier pore, a set of smaller α-helices connect each pair of TM α-helices and lie adjacent to the inner surface of the membrane (view-4). These smaller αhelices are called the matrix helices as they lie in t ...
Campbell Biology in Focus (Urry) Chapter 7 Cellular Respiration
Campbell Biology in Focus (Urry) Chapter 7 Cellular Respiration

... than the covalent bonds in water and carbon dioxide. B) Electrons are being moved from atoms that have a lower affinity for electrons (such as C) to atoms with a higher affinity for electrons (such as O). C) The oxidation of organic compounds can be used to make ATP. D) The electrons have a higher p ...
Flashback - Max-Planck
Flashback - Max-Planck

... ATP during muscle contraction, creatine phosphate can compensate for this loss by transferring a phosphate group to adenosine diphosphate (ADP), turning it back into ATP. The formation of ATP by the transfer of a phosphate group from an energy-rich chemical compound to ADP plays a decisive role in m ...
งานนำเสนอ PowerPoint
งานนำเสนอ PowerPoint

... • the first committed step is too slow to permit its substrate and product to equilibrate • most of other reactions in a pathway function close to equilibrium • committed step = rate-limiting step ...
Problem Set 8 Key
Problem Set 8 Key

... cycle and generate 3 NADH + 1 FADH2 + 1 ATP  total 10 ATP sacrificed per Acetyl-CoA x 8 = 80 ATP 1st Acetyl-CoA does not need to be converted to Malonyl-CoA because it is directly transferred onto the KS domain. The other 7 are carboxylated by ACC, which requires 1 ATP each  7 ATP Each round of el ...
Hexokinase
Hexokinase

... Figure 18.2 Pyruvate produced in glycolysis can be utilized by cells in several ways. In animals, pyruvate is normally converted to acetylcoenzyme A, which is then oxidized in the TCA cycle to produce CO2. When oxygen is limited, pyruvate can be converted to lactate. Alcoholic fermentation in yeast ...
8.2 What Happens During Glycolysis?
8.2 What Happens During Glycolysis?

... the cell captures many high-energy electrons in carrier molecules: 10 NADH and 2 FADH2 for every glucose molecule that was broken down – These carriers each release two electrons into an electron transport chain (ETC), many copies of which are embedded in the inner mitochondrial membrane ...
Pre AP Bio Nov 8 2016
Pre AP Bio Nov 8 2016

... • How did we get from glucose to lactic acid? • In the liver, the process is “reversed” using ATP from aerobic respiration ...
Document
Document

... If coupled directly to ADP  ATP (7 kcal cost), 46 kcal/mole waste, and heat So the electrons on NADH (and FADH2) are not passed directly to oxygen, but to intermediate ...
Krebs cycle
Krebs cycle

... • Electrons are transferred from succinate to FAD and then to ubiquinone (Q) in electron transport chain • Dehydrogenation is stereospecific; only the trans isomer is formed ...
Exam #1
Exam #1

... Synthase. From chap 20: dehydrogenase, reductase, Lipases. There could also be questions pertaining to Case study 23, 25 and exercise #1 and #2. Also, Know how to draw Pyruvate. Chapter 18 –Know the basic structure of the mitochondria—what locations do glycolysis, citric acid cycle, electron transpo ...
Anaerobic respiration with elemental sulfur and with disulfides
Anaerobic respiration with elemental sulfur and with disulfides

... ic matter [55,57,58]. Mesophilic and thermophilic sulfur reducers, mostly from the bacterial domain [59], have been isolated from environments such as anoxic marine or brackish sediments, fresh water sediments, bovine rumen, hot water pools from solfataric ¢elds, and volcanic hot springs. Among sulf ...
Chapter 8 - Plant Biology
Chapter 8 - Plant Biology

... The results of some plant enzyme activities are easy to detect. The darkening of an apple fruit after it has been cut or bitten results from the action of the enzyme polyphenol oxidase on chemicals released from the cells. The softening of a tomato fruit as it ripens is caused by the action of seve ...
Chapter 2 – The Molecules of Cells
Chapter 2 – The Molecules of Cells

... substances with different properties; composed of only one type of atom Atom – Smallest unit of matter that cannot be divided by chemical means Structure of an atom Composed of three subatomic (SA) particles Protons – positively charged SA particles; mass of 1 Dalton (mass of a hydrogen atom) Neutro ...
Leaf Disk Assay
Leaf Disk Assay

... obtain this energy from sunlight and convert it into sugars in the process called photosynthesis. Plants capture sunlight using chlorophyll molecules found in the chloroplasts of their cells. Chlorophyll gives plants their green color. The highest concentration of chloroplasts is found in plant leav ...
List of Possible Research Questions
List of Possible Research Questions

... Na+/K+: How do enzymes differentiate between Na+ and K+? What is the physiological reason that 3Na+ are transported across neural membranes and only 2K+ are transported? Muscle cells: Ca2+ is required for muscle contraction. When the muscle contracts, Ca2+ rushes out of the sarcoplasmic reticulum an ...
2, The Glyoxylate Pathway
2, The Glyoxylate Pathway

... intermediates. GAP and F6P are consumed through glycolysis and oxidative phosphorylation or recycled by gluconeogenesis to form G6P. In the latter case, 1 G6P can be converted, via 6 cycles of pentose phosphate pathway and gluconeogenesis, to 6 CO2 and 12 NADPH. • When R5P is needed more than NADPH, ...
Document
Document

... intermediates. GAP and F6P are consumed through glycolysis and oxidative phosphorylation or recycled by gluconeogenesis to form G6P. In the latter case, 1 G6P can be converted, via 6 cycles of pentose phosphate pathway and gluconeogenesis, to 6 CO2 and 12 NADPH. • When R5P is needed more than NADPH, ...
Perspectives in Nutrition, 8th Edition
Perspectives in Nutrition, 8th Edition

... Electron Transport Chain (see Figure 9-10) ...
Knocking Down of Isoprene Emission Modiies the
Knocking Down of Isoprene Emission Modiies the

... Plant PhysiologyÒ, July 2015, Vol. 168, pp. 859–870, www.plantphysiol.org Ó 2015 American Society of Plant Biologists. All Rights Reserved. ...
Document
Document

... The diagram represents a system in a space station that includes a tank containing algae. An astronaut from a spaceship boards the space station. A- State two changes in the chemical composition of the space station atmosphere that would result from turning on more lights. B- State two changes in t ...
< 1 ... 36 37 38 39 40 41 42 43 44 ... 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