Which cellular processes require the greater expenditure of cellular enery and uses specific carrier molecules?

Cellular processes that require a greater expenditure of energy and utilize specific carrier molecules include active transport and endocytosis. Active transport moves substances against their concentration gradient, using ATP and transport proteins like pumps. Endocytosis involves the engulfing of materials into the cell membrane, requiring energy to form vesicles. Both processes are essential for maintaining cellular homeostasis and nutrient uptake.