Which of the following macromolecules is not used as an energy source for cellular respiration or fermentation? a. carbohydrates b. lipids c. nucleic acids d. proteins

The answer to your question is c.

This is what i found on google “phytoplankton, tiny organisms that live in the ocean, are autotrophs. some types of bacteria are autotrophs. most autotrophs use a process called photosynthesis to make their food.” i hope this you for what your looking for