Respuesta :
1 the net gain of ATP from the breakdown of ten molecules of glucose under aerobic conditions is 360
2 The Kreb cycle does not occur if oxygen is not present
3 in krebs cycle the carbon atom is in a three-carbon molecule are released in three molecules of CO2
4 from glycolysis of one molecule of glucose a 2 pyruvate is formed
hope it helps
2 The Kreb cycle does not occur if oxygen is not present
3 in krebs cycle the carbon atom is in a three-carbon molecule are released in three molecules of CO2
4 from glycolysis of one molecule of glucose a 2 pyruvate is formed
hope it helps
1. The correct option is[tex]\boxed{{\text{D}}{\text{.360}}}[/tex].
2. The correct option is[tex]\boxed{{\text{A}}{\text{.oxygen}}}[/tex].
3. The correct option is[tex]\boxed{{\text{B}}{\text{.three molecules of carbon dioxide}}}[/tex].
4. The correct option is[tex]\boxed{{\text{C}}{\text{. 2 pyruvate}}}[/tex].
Further explanation:
In aerobic respiration, fat, and sugar, molecules break in the presence of oxygen to produce energy. In this, oxygen is used as a reactant and produces ATP. Different stages of aerobic respiration occur in mitochondria. The stages of aerobic respiration are glycolysis, the Krebs cycle.
Glycolysis is the metabolic pathway of glucose that occurs in the cytosol. In glycolysis, the glucose molecule breakdown into two pyruvate molecules and energy is released in the form of ATP and NADH.
(1) One molecule of glucose under aerobic respiration breakdown by the process of glycolysis, the citric acid cycle, and oxidative phosphorylation to form ATP molecules.
In glycolysis, under aerobic respiration six ATP molecules are produced.
In the citric acid cycle, two molecules of ATP are produced. In oxidative phosphorylation, two [tex]{\text{FAD}}{{\text{H}}_2}[/tex] and eight NADH molecules produce ATP.
One molecule of [tex]{\text{FAD}}{{\text{H}}_2}[/tex]produces two ATP molecules, and therefore the number of ATP produced from [tex]{\text{FAD}}{{\text{H}}_2}[/tex] is as follows:
[tex]\begin{aligned}{\text{Number of ATP from}}\;{\text{FAD}}{{\text{H}}_2}&=2\;{\text{FAD}}{{\text{H}}_2}\left( {\frac{{2\;{\text{ATP}}}}{{{\text{1 FAD}}{{\text{H}}_2}}}}\right)\\&{\text{=4}}\;{\text{ATP}}\\\end{aligned}[/tex]
One molecule of NADH produces three ATP molecules and therefore the number of ATP produced from NADH is as follows:
[tex]\begin{aligned}{\text{Number of ATP from}}\;{\text{NADH}}&=8\;{\text{NADH}}\left({\frac{{{\text{3 ATP}}}}{{{\text{1 NADH}}}}}\right)\\&{\text{}}={\text{ 24 ATP}}\\\end{aligned}[/tex]
The number of ATP produced from the one glucose molecule under aerobic respiration is given as follows:
[tex]{\text{Number of ATP from}}\;{\text{glycolysis}}=6\;{\text{ATP}}\\{\text{Number of ATP from citric acid cycle}}={\text{2}}\;{\text{ATP}}\\{\text{Number of ATP from}}\;{\text{FAD}}{{\text{H}}_2}=4\;{\text{ATP}}\\{\text{Number of ATP from}}\;{\text{NADH}}={\text{24}}\;{\text{ATP}}[/tex]
Under aerobic respiration 36 molecules of ATP are produced from one molecule of glucose. Therefore, 10 molecules of glucose produced 360 ATP molecules.
Hence, the correct option is D.
(2) The Krebs cycle is a set of chemical reactions catalyzed by many enzymes and plays a role in energy production and biosynthesis. It is the last stage of carbohydrates, fats, and amino acids breakdown. It occurs in the mitochondrial membrane under aerobic conditions.
The oxygen is the reactant of the Krebs cycle that catalysis the production of NADH. Without oxygen, NADH does not produce thereby causing glycolysis to produce lactic acid instead of pyruvate, a necessary component of the Krebs cycle. Thus, the Krebs cycle is dependent on oxygen and does not occur in the absence of oxygen.
Hence, option A is correct.
(3) Pyruvate is a three-carbon molecule that reacts with coenzyme A in presence of oxygen to form acetyl CoA and releases carbon dioxide. Acetyl CoA then enters Krebs cycle to produce ATP. Therefore, in the Krebs cycle, three molecules of carbon dioxide are released.
Hence, option B is correct.
(4) Glycolysis is the metabolic pathway of glucose that occurs in the cytosol. In glycolysis, glucose molecule is breakdown into two pyruvate molecules and energy is released in the form of ATP and NADH.
Hence, the correct option is C.
Learn more:
1. The moles of NaOH: https://brainly.com/question/4283309
2. The correct name of the compound: https://brainly.com/question/9535482
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Aerobic respiration
Keywords: Glycolysis, Krebs cycle, ATP, oxygen, pyruvate, NADH, carbon, metabolic pathway, mitochondria.
