Question

question 1-2
which two groups of macromolecules are used as the primary source of energy for cellular functions?
proteins and lipids
lipids and carbohydrates
nucleic acids and proteins
carbohydrates and proteins

Explanation:

Carbohydrates are the main immediate - energy source for cells. Lipids are also used as an energy source, especially for long - term energy storage and when carbohydrate supplies are low. Proteins are mainly for building and repairing tissues, and nucleic acids are for storing and transmitting genetic information.

Answer:

B. lipids and carbohydrates