Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 19 - Self-Quiz - Page 317: 5


b. iron-sulfide cofactors

Work Step by Step

Because iron-sulfide cofactors are found in modern organisms, researchers hypothesize that the first life emerged from rock chambers next to deep-sea hydrothermal vents. Rocks around the vents are infused with iron sulfides, and gases such as carbon dioxide and hydrogen cyanide spewing from the vents accept donated electrons coming from the iron sulfides. By accepting these electrons, the gases become reactive, forming organic compounds such as pyruvate. The new compounds build up inside small rock chambers that are the size of cells. The accumulation of these compounds gave rise to the first catalytic molecules called enzymes.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.