Multiple choice

The PORINS are proteins that form long pores in the outer membrane of the

  1. Plastids

  2. Mitochondria

  3. Some Bacteria

  4. All

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Porins are large channel proteins found in the outer membranes of mitochondria, chloroplasts (plastids), and many bacteria. They allow the passage of molecules through these membranes.