Every organism needs energy to survive. A process in which oxygen is combined with the breakdown of sugar (glucose) molecules, releasing energy and giving off carbon dioxide and water, is known as which of the following reactions?
A. Cellular respiration
B. Carbon fixation
C. Photosynthesis
D. Transpiration
The correct answer is A. Cellular respiration.
Cellular respiration is the process by which organisms break down glucose molecules in the presence of oxygen to produce energy. This process releases carbon dioxide and water as byproducts. It is essential for generating ATP, the energy currency of the cell, allowing organisms to perform various functions necessary for survival.