Question

How does testosterone cross the plasma membrane?

A. Simple diffusion,
B. Passive transport through a carrier protein,
C. Active transport,
D. Co-transport.

Answer 1

Steroid hormones like testosterone are lipid soluble, so they can easily pass through the plasma membrane by "Simple diffusion"

In short, Your Answer would be Option A

Hope this helps!

Answer 2

B. passive transport through a carrier protein