Question

multiple choice question

what describes the energy flow in cellular metabolism?

cells store available energy into nutrients through cellular metabolism.
cells convert the energy in nutrients into available energy through metabolism.
cells create energy through metabolism.

Explanation:

Analyze the thermodynamic constraints of cellular systems

According to the first law of thermodynamics, energy cannot be created or destroyed, only transformed from one form to another. Therefore, cells cannot "create" energy.

Evaluate the direction of metabolic energy conversion

During catabolic pathways of cellular metabolism, cells break down organic nutrients (such as glucose) and convert the chemical energy stored in their bonds into biologically usable, available energy forms (such as ATP). They do not store available energy back into nutrients as a primary flow of metabolic energy extraction.

Select the scientifically accurate statement

The statement "Cells convert the energy in nutrients into available energy through metabolism" correctly describes the flow of energy, where chemical energy in nutrient molecules is converted into cellular energy (ATP) to power cellular work.

Answer:

• Cells store available energy into nutrients through cellular metabolism.
• Cells convert the energy in nutrients into available energy through metabolism. (Correct answer)
• Cells create energy through metabolism.