aerobic respiration in bacteria

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Question:It's been suggested to me that anaerobic respiration is less efficient (produces less ATP) than aerobic respiration. By anaerobic respiration I do NOT mean fermentation - where pyruvate goes to lactic acid and only 2 ATPs are produced. What I mean is this: aerobic respiration = respiration that uses Oxygen as terminal electron acceptor in ETC anaerobic respiration = respiration that uses a terminal electron acceptor other than O2, i.e. CO2 in methanogens and NO3- in nitrogen fixating bacteria. My train of thought is that they should both produce an equal amount of ATP since both carry out chemiosmosis and both have a terminal electron acceptor. Why the general belief that anaerobic produces less ATP? What, other than the nature of the terminal electron acceptor, is different?

Answers:If you look at the net free energy change from the following anaerobic reactions: glucose + 3 NO3- + 3 H2O ==> 6 HCO3- + 3 NH4+ G0' = -1796 kJ / mol glucose glucose + 3 SO42- + 3 H+ ==> 6 HCO3- + 3 SH- G0' = -453 kJ / mol glucose glucose + 12 S + 12 H2O ==> 6 HCO3- + 12 SH- + 18H+ G0' = -333 kJ / mol glucose and look at the free energy change from aerobic respiration: glucose + 6 O2 ==> 6 CO2 + 6 H2O G = -2880 kJ / mol glucose Then you see that you are absolutely right about the nature of the terminal electron acceptor that is different. These very important terminal electron acceptors (nitrate NO3-, sulfate SO42-, elemental sulfur S) have smaller reduction potentials than O2, meaning that less energy is released per oxidized molecule of primary electron donor in the above reactions) than in aerobic respiration (i.e. it is less energetically efficient). Hope this helps.

Question:Differentiate between aerobic respiration, glycolysis, and fermentation to include the reactants, products, energy produced, and the organelles involved.

Answers:Aerobic respiration merely describes whether or not the reaction requires oxygen or not. Both glycolysis and fermentation are anaerobic, meaning they do not require oxygen. Glycolysis requires 2 ATP, gluclose, and 2 molecules of NAD+. The energy produced from glycolysis is 4 ATP (resulting in a net gain of 2). The products of glycolysis are 2 pyruvate molucules, 4 ATP, and 2 NADH molucules. Glycolysis occurs just outside the mitochondria of the cell. Fermentation takes place after glycolysis. The products are lactic acid or alchol (depending on what kind of fermentation), 2 ATP, and CO2. The energy produced is 2 ATP, far less than aerobic respiration. Fermentation is carried out mostly by yeasts and bacterias.

Question:Name the inputs and outputs of aerobic respiration and anaerobic respiration. please help im so lost!

Answers:Aerobic respiration: A type of respiration in which foodstuffs (usually carbohydrates) are completely oxidized to carbon dioxide and water, with the release of chemical energy, in a process requiring atmospheric oxygen. Equation: Glucose + Oxygen -----> 'E' + Carbon dioxide + Water Input: 1).glucose 2).oxygen Output: 1).A large amount of energy 2).Carbon dioxide 3).Water Anaerobic respiration: A type of respiration in which foodstuffs (usually carbohydrates) are partially oxidized, with the release of chemical energy, in a process not involving atmospheric oxygen. Since the substrate in never completely oxidized the energy yield of this type of respiration is lower than that of aerobic respiration. Equation for human anaerobic respiration: Glucose -----> 'e' + lactic acid Equation for some yeasts and bacteria: Glucose -----> 'e' + ethanol (alcohol) + carbon dioxide Input: 1).glucose Output: 1).small amount of energy 2).lactic acid (in humans) 3).ethanol (in bacteria and yeasts) 4).carbon dioxide (in bacteria and yeasts)

Question:1. The potential energy of glucose is transferred to ATP molecules 2. The enzymes for anaerobic respiration are produced and stored in lysosomes 3. Lactic acid is produced in muscle tissue 4. Alcohol is produced by yeast and bacteria

Answers:Aerobic means you have oxygen so it would be 1. Lactic acid and alcohol are both produced in anerobic reactions (that is why your muscles hurt when you are working hard...not enough oxygen so the cells make lactic acid)

From Youtube

aerobic respiration :aerobic respiration

Aerobic respiration :Just a homework video for my Biology teacher. Hi, Charles. To any suscribers, just ignore this unless you want to learn about A-Level aerobic respiration.