Question

(n) ________ is a carrier protein that transports two substances in the same direction across a membrane.

a) Symporter
b) Antiporter
c) Uniporter
d) Facilitator

Answer 1

A symporter is a carrier protein that transports two substances in the same direction across a membrane.

Step-by-step explanation:

The correct answer is a) Symporter. A symporter is a type of carrier protein that transports two substances in the same direction across a membrane. It carries two different ions or molecules, both in the same direction. An example of a symporter is the sodium-glucose transporter (SGLT) found in the small intestine and kidney tubules. It transports both sodium ions and glucose molecules from the lumen of the intestine or tubules into the epithelial cells.