Concept explainers
To state:
The origin of oxygen atoms in carbon dioxide and water and the end products of
Introduction:
Organisms obtain energy through a process called cellular respiration. This process occurs in two stages; glycolysis and aerobic respiration. Glycolysis is an anaerobic process. Aerobic respiration includes Krebs cycle and electron transport.
Answer to Problem 41A
The oxygen atoms in carbon dioxide come from the glucose molecule and the oxygen in water comes from the air or atmosphere.
Explanation of Solution
The end products of cellular respiration are carbon dioxide and water. The first stage is glycolysis during which glucose molecule is broken down in the cytoplasm of cells to form pyruvate.
During the second stage called Krebs cycle, pyruvate is transported into the mitochondrial matrix, where it is finally converted to carbon dioxide. So the oxygen in carbon dioxide comes from the glucose molecule.
During electron transport which is the final step in breakdown of glucose, oxygen is the final electron acceptor which combines with hydrogen ions to form water. This oxygen comes from air that is taken in during breathing.
Chapter 8 Solutions
Biology Illinois Edition (Glencoe Science)
Additional Science Textbook Solutions
Biology: Life on Earth
Anatomy & Physiology
Human Anatomy & Physiology (11th Edition)
Human Physiology: An Integrated Approach (8th Edition)
Microbiology: An Introduction
Microbiology: An Introduction (13th Edition)
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education