Question

cells use energy for which of the following?
to do work
to synthesize proteins
to expel waste
to move substances across membranes
all answers are correct

Explanation:

Cells require energy for various functions. Doing work (like mechanical work in muscle cells), synthesizing proteins (anabolic process needing energy), expelling waste (active transport may be involved), and moving substances across membranes (especially active transport) all need energy. So all these activities are energy - consuming processes for cells.

Answer:

E. All answers are correct