Describe the Krebs Cycle\'s process across evolution: a.) First appearance on ea

Question

Describe the Krebs Cycle's process across evolution:

a.)   First appearance on earth.

a.     What are its inputs and where do they come from?

b.     What are its outputs and where do they go?

c.     What is it’s most important output?

b.)   Describe each and every subsequent different function of this process across evolutionary time since its inception up to its role in aerobic metabolism.  As in a.), you will need to specify inputs and where from, outputs and where they go, and the most important output.

Explanation / Answer

The first stage of the oxidation where the glucose is converted into the pyruvate ,later the pyruvate molecule is converted into the acetyl co A which is then enters the krebs cycle . Krebs cycle ocurs in the mitochondrial matrix ,the two carbons of the acetyl co A is converted into the Carbon dioxide with the simultaneous formation of the reducing equivalents called NADH .

What are the inputs and where do they come from?

NADH which comes form the Photosynthesis ,CO 2 which comes form the water and ATP from the reverse proton pump of the photosynthesis .

What are the outputs and where do they come from?

Pyruvate from glycolysis , ADP and NAD +from the reverse proton pump and photosynthesis

what is the most important output is ?

the most important output is NADH +H , and ATP is the most important output .

Krebs cycle ;

krebs cycle is the series of the chemichal reactions used by the all aerobic organisms to generate energy through the oxidation of the acetate derived form the fats ,proteins into carbondoxide and chemichal energy into the ATP.It will also produces the precursor of the certain aminoacids as well as the reducing agent NADH which is used in the various biochemichal reactions .

the cycle consumes the acetyl Co A and water ,Reduces the NAD+ to NADH and produce the carbondioxide as the biproduct . The NADH generated by the TCA cycle is fed into the oxidative phosphorylation . the net results of these two linked pathways is oxidation of the neutrients to produce the usable chemichal energy in the form of the ATP .

Pyruvate molecules produced through the glycolysis are actively transported across the inner mitochondrial memberane and into matrix ,where they can be either oxidized combined with CO A to form the actyl co A , CO2 and NADH or they can be carboxylated to form oxaloactate .the amount of the oxaloacetate is therefor is the anapleurotic reaction , increasing the cycle capacity to metabolise acetyl co A when tissue energy needs are suddenly increased by the activity .

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.