What is the total number of ATP in cellular respiration?

What is the total number of ATP in cellular respiration?

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).

Does cellular respiration make 36 or 38 ATP?

ATP yield during aerobic respiration is not 36–38, but only about 30–32 ATP molecules / 1 molecule of glucose . 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 synthase produces 1 ATP / 3 H+.

Why is the total count about 30 or 32 ATP?

Why is the total count of about 30 or 32 ATP molecules rather than a specific number? Organism that only carry out fermentation or anaerobic respiration, cannot survive in the presence of oxygen. Only creates two ATP for each molecule of glucose. Many bacteria carry out alcohol fermentation under anaerobic conditions.

Does cellular respiration make a total of 34 molecules of ATP?

Electron transport begins with several molecules of NADH and FADH2 from the Krebs cycle and transfers their energy into as many as 34 more ATP molecules. All told, then, up to 38 molecules of ATP can be produced from just one molecule of glucose in the process of cellular respiration.

What are the subunits of ATP?

The FO region of ATP synthase is a proton pore that is embedded in the mitochondrial membrane. It consists of three main subunits, a, b, and c. Six c subunits make up the rotor ring, and subunit b makes up a stalk connecting to F1 OSCP that prevents the αβ hexamer from rotating.

What is the net gain of ATP in glycolysis?

In glycolysis, the net gain of ATP molecules is 2. Two ATP per glucose molecule are required to initiate the process, then a total of four ATP are produced per molecule of glucose.

Why is the total count about 36 or 38?

Why is the total count about 36 or 38 ATP molecules rather than a specific number? Since phosphorylation and the redox reactions aren’t directly coupled to each other, the ratio of the number of NADH molecules to the number of ATP molecules is not a whole number.

How is 30 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. …

What are the 3 subunits of ATP?

It consists of three main subunits, a, b, and c. Six c subunits make up the rotor ring, and subunit b makes up a stalk connecting to F1 OSCP that prevents the αβ hexamer from rotating. Subunit a connects b to the c ring. Humans have six additional subunits, d, e, f, g, F6, and 8 (or A6L).

How do subunits join ATP?

The three α-subunits and the three β-subunits are arranged alternately around a central α-helical coiled-coil in the γ-subunit. Passage of protons through a pathway between the c-ring and subunit a releases energy to drive the clockwise rotation of the rotor (as viewed from the membrane) during ATP synthesis.

What are the 7 steps of cellular respiration?

The steps of aerobic cellular respiration are: Glycolysis (the break down of glucose) Link reaction Krebs cycle Electron transport chain, or ETC

What is molecule yields the most ATP from cellular respiration?

In cells which use oxygen, the pyruvate is used in a second process, the Krebs cycle, which produces more ATP molecules. Biology textbooks often state that 38 ATP molecules can be made per oxidised glucose molecule during cellular respiration (two from glycolysis, two from the Krebs cycle, and about 34 from the electron transport chain).

What are the four phases of cellular respiration?

The four different phases of the cellular respiration process are: glycolysis, pyruvate oxidation, the citric acid cycle or Krebs cycle, and oxidative phosphorylation. Phases of cellular respiration detailed: Glycolysis , citric acid/Krebs cycle, electron transport chain.

What are all the steps of cellular respiration?

Steps of cellular respiration. Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP . The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.