Question

Which of the following statements accurately describes the process of ABC transporter functioning?

A. Periplasmic binding proteins bind the substance, which is transported through the channel, and energy comes from ATP.
B. The substance is transported through the channel and released inside the cell, with energy derived from ATP.
C. The substance is released inside the cell while ATP is converted to ADP + Pi, without involving periplasmic binding proteins.
D. Periplasmic binding proteins are involved, but energy is not derived from ATP during the process.

Answer 1

The ABC transporter functions by transporting substances across the cell membrane with the use of energy from ATP, making B the correct option.

Step-by-step explanation:

The correct statement that describes the process of ABC transporter functioning is: B. The substance is transported through the channel and released inside the cell, with energy derived from ATP. This mechanism highlights the involvement of ATP as the source of energy needed for the active transport of substances across a cell membrane against their concentration gradient. ABC transporters are integral membrane proteins that utilize the energy from ATP hydrolysis to move substances across cellular membranes. They consist of three main components: two transmembrane domains, which form the channel through which the substrate passes, and two nucleotide-binding domains, which hydrolyze ATP to provide the energy for transport.