A secondary lysosome is a lysosome that
A) provides a backup to the primary lysosomes.
B) is smaller than a primary lysosome.
C) will become a primary lysosome when it fuses with a phagosome.
D) is a primary lysosome that has fused with a phagosome.
E) has exocytosed.

Question

Quizplus · Accepted Answer

A secondary lysosome is formed when a primary lysosome fuses with a phagosome, which contains material engulfed by the cell. This fusion allows for digestion of the material within the phagosome. Therefore, D is the correct answer as it describes a primary lysosome that has fused with a phagosome to form a secondary lysosome.

A Secondary Lysosome Is a Lysosome That