Description : Why is the Krebs cycle called the TCA cycle ?
Last Answer : The first acid produced in the Krebs cycle is citric acid. Since citric acid contains three carboxylic (- COOH) radicals , the Krebs-cycle is called the TCA cycle or tri-carboxylic acid cycle.
Description : The most important source of reducing equivalents for FA synthesis on the liver is (A) Glycolysis (B) HMP-Shunt (C) TCA cycle (D) Uronic acid pathway
Last Answer : Answer : B
Description : Which of these statements is incorrect? (a) Enzymes of TCA cycle are present in mitochondrial matrix. (b) Glycolysis occurs in cytosol. (c) Glycolysis operates as long as it is supplied ... that can pick up hydrogen atoms. (d) Oxidative phosphorylation takes place in outer mitochondrial membrane
Last Answer : (d) Oxidative phosphorylation takes place in outer mitochondrial membrane
Description : Which of these statements is incorrect ? (1) Enzymes of TCA cycle are present in mitochondrial matrix. (2) Glycolysis occurs in cytosol. (3) Glycolysis operates as long as it is supplied ... that can pick up hydrogen atoms. (4) Oxidative phosphorylation takes place in outer mitochondrial membrane.
Last Answer : (4) Oxidative phosphorylation takes place in outer mitochondrial membrane.
Description : The following are true about the oxidation of glucose: a. glycolysis produces 3% of the energy ultimately obtained from glucose b. the first stage of glycolysis involves phosphorylation of glucose to 1,6-fructose biphosphate. c. glucose enters the Kreb's cycle as pyruvate d. all above
Last Answer : all above
Description : Link between glycolysis, Krebs’ cycle and β-oxidation of fatty acid or carbohydrate and fat metabolism is (a) oxaloacetic acid (b) succinic acid (c) citric acid (d) acetyl CoA.
Last Answer : (d) acetyl CoA.
Description : Plants, but not animals, can convert fatty acids to sugars by a series of reactions called (a) photosynthesis (b) Kreb’s cycle (c) glycolysis (d) glyoxylate cycle.
Last Answer : (d) glyoxylate cycle.
Description : Out of 36 ATP molecules produced per glucose molecule during respiration (a) 2 are produced outside glycolysis and 34 during respiratory chain (b) 2 are produced outside mitochondria and 34 inside ... (c) 2 during glycolysis and 34 during Krebs' cycle (d) all are formed inside mitochondria
Last Answer : (b) 2 are produced outside mitochondria and 34 inside mitochondria
Description : During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP? (a) Glycolysis (b) Krebs’ cycle (c) Conversion of pyruvic acid to acetyl CoA (d) Electron transport chain
Last Answer : (d) Electron transport chain
Description : The overall goal of glycolysis, Krebs’ cycle and the electron transport system is the formation of (a) ATP in one large oxidation reaction (b) sugars (c) nucleic acids (d) ATP in small stepwise units
Last Answer : d) ATP in small stepwise units.
Description : Connecting link between glycolysis and Krebs’ cycle before pyruvate entering Krebs’ cycle is changed to (a) oxaloacetate (b) PEP (c) pyruvate (d) acetyl CoA.
Description : Which of the following is the key intermediate compound linking glycolysis to the Krebs’ cycle? (a) Malic acid (b) Acetyl CoA (c) NADH (d) ATP
Last Answer : (b) Acetyl CoA
Description : The first phase in the breakdown of glucose, in animal cell, is (a) fermentation (b) Krebs’ cycle (c) glycolysis (d) ETS.
Last Answer : (c) glycolysis
Description : Yeast play an important role in the alcohol industry, converting pyruvic acid into carbondioxide and ethyl alcohol by the process of A- glycolysis B- respiration C- fermentation D- Krebs cycle
Last Answer : fermentation
Description : Krebs cycle which is also called aerobic respiration require `O_(2)` supply.
Last Answer : Krebs cycle which is also called aerobic respiration require `O_(2)` supply.
Description : TCA cycle starts with the condensation of acetyl group with (A) _____ (B)_____ to yield citric acid.
Last Answer : TCA cycle starts with the condensation of acetyl group with (A) _____ (B)_____ to yield citric acid.
Description : cAMP is so called because it is formed during (A) TCA cycle (B) Urea cycle (C) Rhodopsin cycle (D) It has a cyclic structure
Last Answer : Answer : D
Description : All of the following compounds are intermediates of TCA cycle except (A) Maleate (B) Pyruvate (C) Oxaloacetate (D) Fumarate
Description : In TCA cycle, oxalosuccinate is converted to α-ketoglutarate by the enzyme: (A) Fumarase (B) Isocitrate dehydrogenase (C) Aconitase (D) Succinase
Description : Citrulline is an intermediate of (A) TCA cycle (B) Urea cycle (C) Pentose cycle (D) Calvin cycle
Description : The integrator between the TCA cycle and urea cycle is (A) Fumarate (B) Malate (C) Pyruvate (D) Citrate
Last Answer : Answer : A
Description : Out of 24 mols of ATP formed in TCA cycle, 2 molecules of ATP can be formed at “substrate level” by which of the following reaction ? (A) Citric acid→ Isocitric acid (B) Isocitrate→ Oxaloacetate (C) Succinic acid→ Fumarate (D) Succinylcat→ Succinic acid
Last Answer : D
Description : Most of the metabolic pathways are either anabolic or catabolic. Which of the following pathways is considered as “amphibolic” in nature? (A) Glycogenesis (B) Glycolytic pathway (C) Lipolysis (D) TCA cycle
Description : Before pyruvic acid enters the TCA cycle it must be converted to (A) Acetyl CoA (B) Lactate (C) α-ketoglutarate (D) Citrate
Last Answer : A
Description : One molecule of glucose gives ______ molecules of CO2 in EM-TCA cycle. (A) 6 (B) 3 (C) 1 (D) 2
Description : Substrate level phosphorylation in TCA cycle is in step: (A) Isocitrate dehydrogenase (B) Malate dehydrogenase (C) Aconitase (D) Succinate thiokinase
Description : The number of molecules of ATP produced by the total oxidation of acetyl CoA in TCA cycle is (A) 6 (B) 8 (C) 10 (D) 12
Description : Our body can get pentoses from (A) Glycolytic pathway (B) Uromic acid pathway (C) TCA cycle (D) HMP shunt
Description : Pentose production is increased in (A) HMP shunt (B) Uromic acid pathway (C) EM pathway (D) TCA cycle
Description : All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is (a) isocitrate dehydrogenase (b) malate dehydrogenase (c) succinate dehydrogenase (d) lactate dehydrogenase.
Last Answer : (c) succinate dehydrogenase
Description : TCA cycle functions in A.catabolic reactions B.anabolic reactions C.amphibolic reactions D.none of these
Last Answer : C.amphibolic reactions
Description : Why the bacterium Treponemapallidum is difficult to culture? A-.Because it requires a great deal of water to reproduce B- .Because it is unable to use carbohydrates as an energy source ... TCA cycle and oxidative phosphorylation D- Because it requires extremely low temperature at which water freezes
Last Answer : Because it lacks the genes needed for TCA cycle and oxidative phosphorylation
Description : Oxidative phosphorylation involves (A) Electron transport system (B) Substrate level phosphorylation (C) Reaction catalyzed by succinic thiokinase in TCA cycle (D) None of the above
Last Answer : (A) Electron transport system
Description : In the TCA cycle, at which of the following enzyme-catalyzed steps, incorporation of elements of water into an intermediate of the cycle takes place : (A) Citrate synthase (B) Aconitase (C) Maleate dehydrogenase (D) Succinyl Co-A synthase
Last Answer : (C) Maleate dehydrogenase
Description : Net gain of ATP of Krebs cycle and ETS. -Biology
Last Answer : answer:
Description : Why Krebs Cycle is called as citric acid cycle? -Biology
Description : Site of Krebs cycle and oxidative phosphorylation. -Biology
Description : Site of Krebs cycle in mitochondria. -Biology
Description : What is the main function of the Krebs cycle? -Biology
Description : What are the products of the Krebs cycle? -Biology
Description : Carbon components formed during Krebs cycle. -Biology
Description : Gateway of Krebs cycle? -Biology
Description : What molecules are the main electron carriers of the Krebs cycle?
Last Answer : NADH and FADH2
Description : Why is Krebs cycle called citric acid cycle ?
Last Answer : The first acid produced in the Krebs-cycle is 6 - carbon citric acid. Since the Krebs cycle begins with citric acid, the Krebs cycle is called the citric acid cycle.
Description : What is the Krebs cycle ?
Last Answer : In the second stage of respiration, acetyl co-derived from pyruvic acid enters the mitochondria which produces various types of organic acids , carbon dioxide and water in a cycle called Krebs-cycle.
Description : Where do the reactions of the Krebs cycle take place in the cell ?
Last Answer : Krebs cycle reactions occur in the mitochondria of the cell.
Last Answer : mitochondria.
Last Answer : The Krebs cycle was discovered by Sir Hans Krebs