Yeast cells that have defective mitochondria incapable of respiration will be able to grow by catabolizing which of the following carbon sources for energy?
A) glucose
B) proteins
C) fatty acids
D) glucose, proteins, and fatty acids
E) Such yeast cells will not be capable of catabolizing any food molecules and, therefore, will die.

Question

Quizplus · Accepted Answer

Yeast cells with defective mitochondria are unable to perform respiration to produce ATP, which is the main energy source for normal yeast cells. Therefore, they rely on fermentation to produce ATP using glucose as the carbon source. Glucose can be catabolized by the process of glycolysis, which does not require mitochondria. However, proteins and fatty acids cannot be catabolized by glycolysis alone and require the presence of functional mitochondria for their breakdown.

Yeast Cells That Have Defective Mitochondria Incapable of Respiration Will