• 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
powerpoint - Retno Mastuti
powerpoint - Retno Mastuti

... atau NADH/NADPH di proplastid sel non fotosintetik Glutamin sintase (GS) ...
part_4_cellular_respiration_stations
part_4_cellular_respiration_stations

... Lactic acid fermentation is a type of anaerobic respiration that does not require oxygen. It occurs in muscle cells found in humans. Muscle cells normally use aerobic respiration when oxygen is sufficient. When oxygen is insufficient during vigorous activity, the muscles “switch” over to using anaer ...
Test 1 Study Guide
Test 1 Study Guide

... d. Heat sink – resists temperature change. Calorie is defined as energy required to raise 1 ml or g of water 1 oC. Heat is given off by evaporation, e.g. sweating. e. Acids and bases. Water dissociates into equal numbers of hydrogen ions and hydroxide ions. H2O  H+ + OH- (Fig. 2.9) i. pH Scale. Def ...
12-Glycolysis2016-11-15 13:225.6 MB
12-Glycolysis2016-11-15 13:225.6 MB

... the transfer of electrons from reduced coenzymes to molecular oxygen by ETC ...
Biochemistry
Biochemistry

... Bis is of two parts; Bi =‫ثنائي‬, while s = “separated” (i.e. on different locations)  Glycerald. 3-P converts into 2,3 bis PG or 2,3 BPG or 1,3 DPG and is present in most cells at low concentrations, but in the RBCs (erythrocytes) it is at high concentration (4 mM) which is equal to hemoglobin. I ...
ch_02_Chemical Organization
ch_02_Chemical Organization

... its outermost energy level Oxygen δ+ atom by sharing electrons with a pair of hydrogen atoms. 2δ− The sharing is unequal, because the oxygen atom b Charges on a water ...
Document
Document

... molecules are broken down in a series of steps  Electrons from organic compounds are usually first transferred to NAD, a coenzyme  As an electron acceptor, NAD functions as an oxidizing agent during cellular respiration  Each NADH (the reduced form of NAD) represents stored energy that is tapp ...
Lipid Metabolism Catabolism Overview
Lipid Metabolism Catabolism Overview

... Activation and Transport into Matrix • FA must be  attached to CoA • High energy bond • Costs  ATP AMP  (2 ATP equivalents) ...
Sample Chapters - Pearson Canada
Sample Chapters - Pearson Canada

... with storing and generating metabolic energy and with using that energy in biosynthesis of low-molecular-weight compounds (intermediates) and energystorage compounds. Not included are nucleic acid and protein biosynthesis from monomeric precursors. The reactions of intermediary metabolism can be tho ...
Citric Acid Cycle
Citric Acid Cycle

... More than 95% of the energy for the human being is generated through this pathway (in conjunction with the oxidative phosphorylation process) ...
Lipid Synthesis 1. Fatty acid synthesis
Lipid Synthesis 1. Fatty acid synthesis

... The processes of fatty acid degradation had been worked out prior to fatty acid synthesis, and there was some conjecture that perhaps synthesis might simply be the reverse of degradation. Indeed, it was realized early on that [14C] acetate was a direct precursor for fatty acids providing some substa ...
Photosynthetic Light Harvesting by Carotenoids
Photosynthetic Light Harvesting by Carotenoids

... low-energy side of the carotenoids absorption band, thus enabling selective excitation of the zero-phonon line of the S0 3 S2 transition. Therefore, we expect only rather small vibrational relaxation to be possible. The large shift in the position of the transient differential transmission spectra o ...
PL05_Glucdisp
PL05_Glucdisp

... chain, the reduction/dehydration/reduction steps, moving the fatty acid to the right site and finally releasing it as FA-CoA ...
Chapter 10
Chapter 10

... • In aerobic respiration, the terminal electron acceptor is oxygen and the reduced form is water • Other terminal electron acceptors (sulfur, protons, and ferric ions) are used by other organisms, especially bacteria and archaea • These are examples of anaerobic respiration © 2012 Pearson Education, ...
Metabolism & Enzymes
Metabolism & Enzymes

... Hemoglobin  4 polypeptide chains  can bind 4 O2;  1st O2 binds  now easier for other O2 to bind AP3Biology ...
Glycolysis [Compatibility Mode]
Glycolysis [Compatibility Mode]

... 10 Steps of Glycolysis Step -1 The enzyme hexokinase phosphorylates (adds a phosphate group to) glucose in the cell's cytoplasm. In the process, a phosphate group from ATP is transferred to glucose producing glucose 6-phosphate. ...
Praxis Review for Science
Praxis Review for Science

... • Molecular oxygen is used as the terminal electron acceptor for the respiratory chain. ...
2 - Holy Trinity Diocesan High School
2 - Holy Trinity Diocesan High School

... molecules are broken down in a series of steps  Electrons from organic compounds are usually first transferred to NAD, a coenzyme  As an electron acceptor, NAD functions as an oxidizing agent during cellular respiration  Each NADH (the reduced form of NAD) represents stored energy that is tapp ...
2 H+
2 H+

... molecules are broken down in a series of steps §  Electrons from organic compounds are usually first transferred to NAD+, a coenzyme §  As an electron acceptor, NAD+ functions as an oxidizing agent during cellular respiration §  Each NADH (the reduced form of NAD+) represents stored energy that is t ...
1st Semester Final Exam Study Guide (excluding DNA/protein
1st Semester Final Exam Study Guide (excluding DNA/protein

... b) They are usually coupled with anabolic pathways to which they supply energy in the form of ATP. c) They are endergonic. d) They are spontaneous and do not need enzyme catalysis. e) They build up complex molecules such as protein from simpler compounds. 42. A type of protein critical to all cells ...
THE CITRIC ACID CYCLE
THE CITRIC ACID CYCLE

... • The proximity of one enzyme to another increases the overall reaction rate and minimizes side reactions. • All the intermediates in the oxidative decarboxylation of pyruvate are tightly bound to the complex and are readily transferred because of the ability of the lipoyllysine arm of E2 to call on ...
Energy and cellular metabolism
Energy and cellular metabolism

... Transport work enables cells to move ions, molecules, and larger particles through the cell membrane and through the membranes of organelles in the cell. Transport work is particularly useful for creating concentration gradients, distributions of molecules in which the concentration is higher on one ...
Structural Investigation of the Antibiotic and ATP
Structural Investigation of the Antibiotic and ATP

... composed of amino acid residues contributed by both subunits in the dimer. There are few specific interactions between the protein and the adenine ring of the nucleotide; rather the AMPCPP molecule is locked into position by extensive hydrogen bonding between the a-, p-, and y-phosphates and protein ...
Bio426Lecture19Mar8 - NAU jan.ucc.nau.edu web server
Bio426Lecture19Mar8 - NAU jan.ucc.nau.edu web server

... Reviewing the Calvin cycle and counting carbon (C) atoms associated with one carboxylation. 1. Carboxylation. 1 CO2 binds to 1 RuBP (5C) producing two molecules of 3-PGA (total of 6 C). 2. Reduction. The two 3-PGA (3 C each) are reduced to two glyceraldehyde 3 phosphate (G3P, 3 C each) using ATP an ...
An Introduction to Energy, Enzymes, and Metabolism
An Introduction to Energy, Enzymes, and Metabolism

... a compound called salicylic acid. Modern aspirin is composed of a derivative of salicylic acid called acetylsalicylic acid, which is gentler to the stomach. Only recently, however, have we learned how such drugs work. Aspirin and ibuprofen are examples of drugs that inhibit specific enzymes found in ...
< 1 ... 22 23 24 25 26 27 28 29 30 ... 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