Concept explainers
To explain: The reason behind an anaerobic condition when the cell could not discard pyruvate as a waste product.
Introduction: The cells growing in the absence of oxygen (anaerobic condition) in which the end product of glycolysis is pyruvate undergoes fermentation. In the process of fermentation, NAD+ is regenerated from NADH by transferring electron to organic molecule like lactate and ethanol.
Explanation of Solution
In the process of fermentation, in anaerobic condition of cell NAD+ is regenerated from NADH by transferring electron to organic molecule. To continue the process of glycolysis in the cell, cells need to regenerate NAD+. So, without the fermentation process there is no other methodical way to generate NAD+. In absence of NAD+, the glycolysis process is discontinued from the step- 6 that is energy generation phage where the oxidation of glyceraldehydes 3-phosphate produce 1, 3-biphosphoglycerate to continue the glycolysis process.
To explain: The products from glucose accumulate in the cell unable to generate either lactate or ethanol by fermentation.
Introduction: The cells growing in the absence of oxygen (anaerobic condition) in which the end product of glycolysis is pyruvate undergoes fermentation. In the process of fermentation, NAD+ is regenerated from NADH by transferring electron to organic molecule like lactate and ethanol.
Explanation of Solution
In the fermentation process in presence of pyruvate, the NAD+ is reinitiated from NADH by transferring electron to organic molecule like lactate and ethanol. To keep glycolysis continuing in the cell, it needs regenerated NAD+. There is no suitable way rather than the fermentation to produce NAD+. In glycolysis process in absence of regenerated NAD+ at energy generation step of glyceraldehyde 3-phosphate to 1, 3-biphosphoglycerate will not occur. The product glyceraldehydes 3-phosphate would accumulate in the cell unable to make either lactate or ethanol, neither it would able to regenerate NAD+. So, in this step also glycolysis process is blocked.
Want to see more full solutions like this?
Chapter 13 Solutions
Essential Cell Biology (fifth 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