Podcast
Questions and Answers
What is the main purpose of Acetyl CoA in the Krebs Cycle?
What is the main purpose of Acetyl CoA in the Krebs Cycle?
Which component is formed when NAD+ combines with hydrogen ions and high-energy electrons?
Which component is formed when NAD+ combines with hydrogen ions and high-energy electrons?
Which of the following is NOT a product of the Krebs Cycle?
Which of the following is NOT a product of the Krebs Cycle?
In which part of the cell does the Krebs Cycle occur?
In which part of the cell does the Krebs Cycle occur?
Signup and view all the answers
What role do the hydrogen ions play in the Krebs Cycle?
What role do the hydrogen ions play in the Krebs Cycle?
Signup and view all the answers
Study Notes
Stage 2: Krebs Cycle (Aerobic)
- Krebs cycle occurs in the mitochondrial matrix
- Requires oxygen (aerobic)
- Pyruvic acid, a molecule from glycolysis, enters the mitochondrion
- Each molecule of pyruvic acid is broken down to one molecule of carbon dioxide and a 2-carbon molecule called Acetyl CoA
- Acetyl CoA enters the Krebs cycle, a series of reactions
- In the reactions of the Krebs cycle, the molecule breaks down and releases carbon dioxide molecules, hydrogen ions (protons), and electrons
- Hydrogen ions and high-energy electrons combine with the electron acceptor NAD+ to form NADH
- NAD+ is short for nicotinamide adenine dinucleotide
Products of Krebs Cycle (Fate)
- ATP: releases energy, e.g. for active transport
- Carbon dioxide: released into the atmosphere. Used in photosynthesis by plants
- Hydrogen ions (H+) and electrons: Trapped by NAD+ to form NADH. This NADH is transported to the electron transport system.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the Krebs cycle, a crucial aerobic process that occurs in the mitochondrial matrix. This quiz covers the breakdown of pyruvic acid, the formation of Acetyl CoA, and the cycle's various products, including ATP and NADH. Test your understanding of these vital metabolic reactions!
