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 energy - source for cells as they are easily broken down to release energy. Lipids also serve as an important energy reserve and can be used for energy when carbohydrates are scarce. Proteins are mainly for building and repairing tissues and are not the primary energy source. Nucleic acids are involved in genetic information storage and transfer, not energy supply.

Answer:

lipids and carbohydrates