Question

a vesicle is...
an organelle that is responsible for destroying bacteria with hydrogen peroxide
a membrane - bound sac/container made of phospholipids that holds different large molecules
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Explanation:

A vesicle is a membrane - bound sac. It is made of phospholipids (similar to the cell membrane) and can hold various large molecules. Peroxisomes (not vesicles) are responsible for destroying bacteria with hydrogen peroxide.

Answer:

a membrane - bound sac/container made of phospholipids that holds different large molecules