Question

Where does the cell get energy for active transport processes?

Short answer

Answer: The source of energy for active transport in cells is adenosine triphosphate (ATP), which is produced through cellular respiration. The energy from ATP is used to power transport proteins that move molecules across the cell membrane against their concentration gradients.

Step-by-step solution

Understand Active Transport

Active transport is the process by which cells move substances across their membranes against their concentration gradients, meaning that molecules are moved from an area of lower concentration to an area of higher concentration. This process is essential for many biological processes, such as maintaining cell membrane potential, nutrient uptake, and waste removal.

Identify Energy Source

The energy required for active transport processes in cells is provided by adenosine triphosphate (ATP). ATP is the primary source of energy in cells and is produced through cellular respiration.

Explain ATP's Role in Active Transport

During active transport, ATP provides the necessary energy by undergoing hydrolysis, a chemical reaction where a water molecule is used to break one of the phosphate bonds in ATP, releasing energy. This energy is then utilized to power a transport protein that moves molecules across the cell membrane.

Summarize the Answer

In summary, cells obtain energy for active transport processes from adenosine triphosphate (ATP), which is produced through cellular respiration. The energy from ATP is used to power transport proteins that move molecules across the cell membrane against their concentration gradients.