Why Do Prokaryotes Produce More ATP?

How is 38 ATPS formed?

Most of the ATP produced by aerobic cellular respiration is made by oxidative phosphorylation.

Biology textbooks often state that 38 ATP molecules can be made per oxidized glucose molecule during cellular respiration (2 from glycolysis, 2 from the Krebs cycle, and about 34 from the electron transport system)..

Where is the most ATP synthesis in prokaryotes?

Mitochondria, for example, are organelles that provide eukaryotes with most of their energy by producing energy-rich molecules called ATP. Prokaryotes lack mitochondria and instead produce their ATP on their cell surface membrane.

How are 32 ATP produced?

In a eukaryotic cell, the process of cellular respiration can metabolize one molecule of glucose into 30 to 32 ATP. The process of glycolysis only produces two ATP, while all the rest are produced during the electron transport chain. The NADH generated from glycolysis cannot easily enter mitochondria. …

Does photosynthesis produce ATP?

The Light Reactions of Photosynthesis. Light is absorbed and the energy is used to drive electrons from water to generate NADPH and to drive protons across a membrane. These protons return through ATP synthase to make ATP.

How many ATP is equal to NADH?

3 AtpsIn Glycolysis, theres is essentially 4 ATPS formed (net profit of 2), but according to standard conversions ( 3 Atps equal about 1 NADH), so why isn’t there 6 ATPS formed in Glycolsys, with a net profit of 4 ATPS.

How many ATP are produced in prokaryotes?

Sure. In prokaryotes the usual figure is 38. Per glucose, you get 2 net ATPs from glycolysis. A total of 10 NADH’s is made (in glucolysis and the Krebs cycle) per glucose, and 2 FADH2’s.

How 36 ATP is produced?

Electron transport system captures the energy of electrons to make ATP. … Total ATP production from aerobic respiration: 36 ATPs for each glucose that enters glycolysis (2 from glycolysis, 2 from citric acid cycle, 32 from ETP).

Does aerobic respiration produce 36 or 38 ATP?

According to some of newer sources the ATP yield during aerobic respiration is not 36–38, but only about 30–32 ATP molecules / 1 molecule of glucose , because: ATP : NADH+H+ and ATP : FADH2 ratios during the oxidative phosphorylation appear to be not 3 and 2, but 2.5 and 1.5 respectively.

How much ATP does fermentation produce?

Alcoholic fermentation occurs in yeast and produces ethanol and carbon dioxide. Fermentation only produces two ATP per glucose molecule through glycolysis, which is much less ATP than cellular respiration.

What is NADH ATP worth?

For every pair of electrons transported to the electron transport chain by a molecule of NADH, between 2 and 3 ATP are generated. For each pair of electrons transferred by FADH2, between 1 and 2 ATP are generated.

Why do eukaryotes generate only about 36 ATP per glucose in aerobic respiration but prokaryotes may generate about 38 ATP?

Why do eukaryotes generate only about 36 ATP per glucose in aerobic respiration but prokaryotes may generate about 38 ATP? … eukaryotes do not transport as much hydrogen across the mitochondrial membrane as prokaryotes do across the cytoplasmic membrane.

Why do you sometimes get 36 ATP and sometimes get 38 ATP from cellular respiration?

Calculations giving 36-38 ATP per glucose are based on the assumption that oxidation of NADH produces 3 ATP and oxidation of UQH2 (FADH2, Succinate) produces 2 ATP. … They translocate protons outward across the inner mitochondrial membrane, and the resulting proton gradient is used by the ATP synthase to produce ATP.

How do prokaryotes make ATP without mitochondria?

Prokaryotes have their ATP synthesis machinery embedded in the cell membrane, instead of of the mitochondrial/thylakoid membrane which is the case for eukaryotes.

What do prokaryotes use for energy?

Prokaryotes use different sources of energy to assemble macromolecules from smaller molecules. Phototrophs obtain their energy from sunlight, whereas chemotrophs obtain energy from chemical compounds. Energy-producing pathways may be either aerobic or anaerobic. Prokaryotes play roles in the carbon and nitrogen cycles.

Why the number of ATP is not known exactly?

There are three reasons that we cannot state an exact number of ATP molecules generated by one molecule of glucose. Phosphorylation and the redox reactions are not directly coupled to each other, so the ratio of number of NADH to number of ATP is not a whole number.

How do prokaryotes get energy without mitochondria?

Prokaryotes, on the other hand, don’t have mitochondria for energy production, so they must rely on their immediate environment to obtain usable energy. Prokaryotes generally use electron transport chains in their plasma membranes to provide much of their energy.

How much ATP is used in aerobic respiration?

Aerobic vs anaerobic respirationAerobicAnaerobicLocationCytoplasm (glycolysis) and mitochondriaCytoplasmStagesGlycolysis (anaerobic), Krebs cycle, oxidative phosphorylationGlycolysis, fermentationATP producedLarge amount (36 ATP)Small amount (2 ATP)2 more rows

Why is ATP 36 or 38?

Keep in mind, however, that less ATP may actually be generated. … In eukaryotic cells, the theoretical maximum yield of ATP generated per glucose is 36 to 38, depending on how the 2 NADH generated in the cytoplasm during glycolysis enter the mitochondria and whether the resulting yield is 2 or 3 ATP per NADH.