Question

multiple choice question
which type of transporter is best described as an integral membrane protein with cytoplasmic atp - binding domains?

carrier protein
porin
abc transporter
ion channel

Explanation:

• Carrier proteins: Facilitate transport but not defined by cytoplasmic ATP - binding domains.
• Porins: Are channel - like proteins in outer membranes, no ATP - binding domains.
• ABC transporters: Are integral membrane proteins with cytoplasmic ATP - binding domains (ATP - Binding Cassette transporters use ATP, have these domains).
• Ion channels: Form pores for ion transport, no ATP - binding domains.

Answer:

C. ABC transporter