Krebs Cycle and Glucose Energy Extraction
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Questions and Answers

The regulation of ______ cycle involves three regulatory enzymes.

TCA

There are ______ regulatory enzymes in the TCA cycle.

three

______ synthase is one of the three regulatory enzymes.

Citrate

The TCA cycle is regulated by ______ synthase and other enzymes.

<p>citrate</p> Signup and view all the answers

______ is the first regulatory enzyme in the TCA cycle.

<p>Citrate synthase</p> Signup and view all the answers

The three regulatory enzymes in the TCA cycle include ______ synthase.

<p>citrate</p> Signup and view all the answers

Study Notes

Krebs Cycle Overview

  • The Krebs cycle is the second of four processes necessary to extract energy from glucose.

Location and Process

  • The Krebs cycle takes place within the mitochondrial matrix.
  • Pyruvate is formed in the cytosol and imported into the mitochondria.
  • Pyruvate is converted to acetyl-CoA and then imported into the mitochondrial matrix.
  • Acetyl-CoA enters the citric acid cycle.

Function and Regulation

Amphibolic Function

  • The TCA cycle has both anabolic and catabolic functions.

Anabolic Functions

  • α-ketoglutarate is used for the synthesis of some non-essential amino acids.
  • Succinyl CoA is used in heme synthesis.

Regulation of TCA Cycle

  • There are three regulatory enzymes in the TCA cycle.
  • One of the regulatory enzymes is citrate synthase.

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Description

This quiz covers the Krebs cycle, a process that plays a crucial role in extracting energy from glucose. Learn about the importance of the Krebs cycle in cellular respiration.

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