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Oxaloacetate [oxaloacetic acid], under the strict guidance of the enzyme 'citrate synthase', is reacted with the co-enzyme 'Acetyl-CoA' to form the products CoA and citric acid.

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14y ago

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What are the two molecules that enter the citric acid cycle?

The two molecules that enter the citric acid cycle are acetyl-CoA and oxaloacetate. Acetyl-CoA is the key input that combines with oxaloacetate to initiate the cycle.


What two molecules combine to produce citric acid in the citric acid cycle?

Acetyl-CoA and oxaloacetate combine to produce citric acid (or citrate) in the citric acid cycle. This is the first step in the cycle, also known as the condensation step.


Which of the following compounds is regenerated in the citric acid cycle?

Oxaloacetate


An immediate consequence of a cellular deficiency of oxaloacetate is a slowing of what?

An immediate consequence of a cellular deficiency of oxaloacetate is the slowing of the Citric Acid Cycle. The citric acid cycle is also called the tricarboxylic acid cycle.


The citric acid cycle begins and ends with what molecule?

The citric acid cycle begins with acetyl-CoA and ends with oxaloacetate.


What is the source of oxaloacetate?

Oxaloacetate is primarily produced in the mitochondria as an intermediate in the citric acid cycle. It can also be created from pyruvate through a process called anaplerosis, which replenishes citric acid cycle intermediates. Oxaloacetate is a key molecule in energy metabolism and plays a critical role in various metabolic pathways.


What are the intermediates in the citric acid cycle?

The intermediates in the citric acid cycle are citrate, isocitrate, α-ketoglutarate, succinyl-CoA, succinate, fumarate, malate, and oxaloacetate. These intermediates undergo a series of enzymatic reactions to generate energy in the form of ATP.


What is the molecule that is regenerated with every turn of the Krebs cycle?

Each turn of the Kreb's cycle must regenerate oxaloacetate.


How are citric acid produced?

A Condensation reaction between oxaloacetate and acetyl CoA by the enzyme citrate synthase


Can fatty acids be converted to oxaloacetate?

Not directly. Fatty acid β-oxidation results in acetyl CoA, which is then entered to the Citric Acid cycle. The "last" step of the cycle is the formation of oxaloacetate from malate.


An immediate consequence of a cellular deficiency of oxaloacetate is a slowing of?

An immediate consequence of a cellular deficiency of oxaloacetate is a slowing of the citric acid cycle (Krebs cycle). This cycle requires oxaloacetate to combine with acetyl-CoA to generate citrate, so a shortage of oxaloacetate can hinder this process, leading to reduced production of ATP through oxidative phosphorylation.


What compound is produced by the transfer of the acetyl group of acetyl CoA to oxaloacetate?

The compound produced by the transfer of the acetyl group of acetyl CoA to oxaloacetate is citrate, which is the first step in the citric acid cycle (Krebs cycle). This reaction is catalyzed by the enzyme citrate synthase.