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Test 5 Ch 2 - Kenton County Schools
Test 5 Ch 2 - Kenton County Schools

... ____ 11. Refer to the illustration above. Which of the following statements regarding the graph is true? a. Reaction 2 occurs faster than Reaction 3 because Reaction 2 requires more energy than Reaction 3. b. The difference between the graphs shown for Reaction 2 and Reaction 3 occurs because of a ...
Biochemistry Lecture 15
Biochemistry Lecture 15

... • Serves as feedback inhibitor • May be formed when fats catabolized, when glycolysis not needed ...
CHAP NUM="8" ID="CH
CHAP NUM="8" ID="CH

... In the process of carrying out chemical reactions that perform various kinds of work, living cells unavoidably convert other forms of energy to heat. A system can put heat to work only when there is a temperature difference that results in the heat flowing from a warmer location to a cooler one. If ...
Reactions of the citric acid cycle
Reactions of the citric acid cycle

... It is the final pathway where the oxidative metabolism of carbohydrates, amino acids, and fatty acids converge, their carbon skeletons being converted to CO2 and H2O. This oxidation provides energy for the production of the majority of ATP in most animals, including humans. The cycle occurs totally ...
Tricarboxylic acid cycle (TCA cycle, also called the Krebs cycle or
Tricarboxylic acid cycle (TCA cycle, also called the Krebs cycle or

... It is the final pathway where the oxidative metabolism of carbohydrates, amino acids, and fatty acids converge, their carbon skeletons being converted to CO2 and H2O. This oxidation provides energy for the production of the majority of ATP in most animals, including humans. The cycle occurs totally ...
Nitrogen Acquisition and Amino Acid Metabolism
Nitrogen Acquisition and Amino Acid Metabolism

... c. There are hinge regions that move as electrons pass. d. This movement allows for the accommodation of the electrons being close enough to carry over to the next region. e. Electrons are passed into the region where nitrate is bound by movements of the protein. f. There are 2 different hinge regio ...
carbohydrate metabolism
carbohydrate metabolism

... ‰ G-6-PD catalyzes formation of NADPH + H in HMP shunt ‰ Hemolytic anemia usually occur in individuals with G-6-PD deficiency ‰ HMP shunt will not produce enough NADPH required to maintain high level of GSH to protect RBC from Oxidative damage ‰ Hemolysis of RBC will occur because Oxidants will accu ...
Bio 226: Cell and Molecular Biology
Bio 226: Cell and Molecular Biology

... •Insensitive to Cyanide, Azide or CO •Sensitive to SHAM (salicylhydroxamic acid,) •Also found in fungi, trypanosomes & Plasmodium ...
Time course of differential mitochondrial energy metabolism
Time course of differential mitochondrial energy metabolism

... right ventricle (RV) due to pulmonary hypertension that requires additional energy to overcome this increase in pulmonary vascular resistance. In the heart, mitochondria provide, through oxidative phosphorylation, more than 95% of the energy supply in the form of ATP. In the course of oxidative phos ...
Introduction to Metabolism
Introduction to Metabolism

... Almost all of the oxygen (O2) one consumes in breathing is converted to: A) acetyl-CoA. B) carbon dioxide (CO2). C) carbon monoxide and then to carbon dioxide. D) none of the above. E) water. Antimycin A blocks electron transfer between cytochromes b and c1. If intact mitochondria were incubated wit ...
Structure-Guided Site-Directed Mutagenesis of the Bacterial ATP
Structure-Guided Site-Directed Mutagenesis of the Bacterial ATP

... A recent structure of F1 from E. coli has provided relevant insights on the catalytic sites and subunit interactions of the enzyme (Cingolani and Duncan 2011). In Tom Duncan’s lab, previous research demonstrated that the εx state is prevented from forming until hydrolysis of ATP at a catalytic site. ...
Firefly Bioluminescence
Firefly Bioluminescence

... with luciferin, fixing its position in the active site. The adenine ring of ATP is held in place by interactions to Gly339, Tyr340, Gly341 and Ala317, while the side chain carboxylate of Asp422 is H-bonded to the ribose hydroxyl groups. Residues Ser199 and Lys206, highly conserved throughout the acy ...
VSEPR and Molecular Geometry
VSEPR and Molecular Geometry

... Models Models are attempts to explain how nature operates on the microscopic level based on experiences in the macroscopic world. Models can be physical as with this DNA model Models can be mathematical Models can be theoretical or philosophical ...
Calvin Cycle
Calvin Cycle

... Carboxylase, yielding the 3-C 3-phosphoglycerate.  Plants designated C4 have one cell type in which phosphoenolpyruvate (PEP) is carboxylated via the enzyme PEP Carboxylase, to yield the 4-C oxaloacetate. Oxaloacetate is converted to other 4-C intermediates that are transported to cells active in p ...
Diversity in P-loop Structure of A-ATP Synthase
Diversity in P-loop Structure of A-ATP Synthase

... subunits (α3 : β3 : γ : δ : ε : a : b2 : cx) and the eukaryotic V-ATPase has thirteen subunits (A3 : B3 : C : D : E : F : G2 : Hx : a : d : cx : c’x : c’’x).2 The A-ATP synthase is composed of two functional sectors; a water soluble A1 part, containing the catalytic sites, and the membrane bound AO ...
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Living organisms obtain energy by breaking down organic

... In the presence of oxygen, pyruvate is transported into the mitochondrial matrix, where it is converted into carbon dioxide. ...
Motion - TPAYNTER
Motion - TPAYNTER

... In the presence of oxygen, pyruvate is transported into the mitochondrial matrix, where it is converted into carbon dioxide. ...
CH 2
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... 13) An important use of the NADPH produced in the pentose phosphate pathway is in the maintenance of a reducing environment in the cell. In order to reduce oxidized sulfhydryls back to their free states in the laboratory, we use mercaptoethanol or dithiothreitol, but the cellular equivalent of this ...
Bis2A 5.5: Fermentation and regeneration of NAD+
Bis2A 5.5: Fermentation and regeneration of NAD+

... substrate level phosphorylation and fermentation can produce large quantities of ATP. It is hypothesized that this scenario was the beginning of the evolution of the F0 F1 ATPase, a molecular machine that hydrolyzes ATP and translocates protons across the membrane (we'll see this again in the next s ...
Pdf - Text of NPTEL IIT Video Lectures
Pdf - Text of NPTEL IIT Video Lectures

... Typical substrate binding energies range from 3-12 kcal mol-1. That is the order of magnitude which the binding energy goes in the binding of the substrate. Another feature is that not all the twenty amino acids that are present in protein are involved in active sites. Just by observation of the var ...
Enzymes
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(TCA) cycle
(TCA) cycle

... (1) When metabolic intermediates such as isocitrate, PEP, OAA, 2-KG and 3-PG are in high concentration (2) When more ATP is needed with the accumulation of AMP and ADP  Phosphorylation to induce flux through the glyoxylate cycle (1) When NADPH accumulates, isocitrate is directed toward the glyoxyla ...
03. Metabolism of lipids
03. Metabolism of lipids

... mammary glands during lactation • Occurs in cytoplasm • FA synthesis and degradation occur by two completely separate pathways ...
Redox cycling
Redox cycling

... can thereby only be transferred to electron acceptors  Compounds that easily donate electrons have a tendency to reduce other compounds and are therefore often called reductants  Compounds that easily take up electrons can often oxidize other compounds and can therefore be called oxidants  The ox ...
Do Metabolite Transport Processes Limit Photosynthesis?1
Do Metabolite Transport Processes Limit Photosynthesis?1

... recycling of carbon lost through the oxygenation reaction of Rubisco, requires peroxisomes and mitochondria (Bauwe et al., 2010). Since up to one-third of inorganic carbon fixed during the day is lost again through ...
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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.
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