Question

multiple choice 1 point
organisms must constantly bring in certain molecules and ions while keeping others out. this function is accomplished by
lysosomes
vesicles
the nucleus
the plasma membrane
the golgi complex

Explanation:

To solve this, we analyze each option:

• Lysosomes: Digest waste, not for molecule transport/selection.
• Vesicles: Transport within cell, not for external-internal selection.
• Nucleus: Contains DNA, controls cell, not for molecule exchange.
• Plasma membrane: Has selective permeability, regulates entry/exit of molecules/ions.
• Golgi complex: Modifies/sorts proteins, not for molecule selection at cell boundary.

Answer:

D. the plasma membrane