Question

question 7 the external boundary of the cell is called the: select one: a. mitochondrion b. nuclear envelope c. plasma membrane d. plasma border e. lysosome

Explanation:

The plasma membrane is the outer - most boundary of the cell that separates the cell's interior from the external environment. Mitochondria are the power - houses of the cell, the nuclear envelope surrounds the nucleus, and lysosomes contain digestive enzymes. There is no such thing as a "plasma border" in cell biology terms.

Answer:

C. plasma membrane