Which term best describes small membrane-bound sacs that transport materials around the cell and to the cell membrane?

Which term best describes small membrane-bound sacs that transport materials around the cell and to the cell membrane?

• A. Vesicle
• B. Nucleus
• C. Ribosome
• D. Mitochondrion

Answer: (A)

Membrane-bound sacs that move materials around the cell are vesicles. These small bubbles form from the membranes of other organelles like the endoplasmic reticulum and Golgi apparatus and carry cargo such as proteins or lipids to where they’re needed—or to the cell membrane for secretion. The lipid bilayer protects and delivers the contents at the right location. The nucleus isn’t a transport bubble; it’s the cell’s control center housing DNA. Ribosomes are the sites of protein synthesis and lack a surrounding membrane. Mitochondria are energy producers with their own membranes, not primarily involved in transporting cargo within the cell.

Membrane-bound sacs that move materials around the cell are vesicles. These small bubbles form from the membranes of other organelles like the endoplasmic reticulum and Golgi apparatus and carry cargo such as proteins or lipids to where they’re needed—or to the cell membrane for secretion. The lipid bilayer protects and delivers the contents at the right location. The nucleus isn’t a transport bubble; it’s the cell’s control center housing DNA. Ribosomes are the sites of protein synthesis and lack a surrounding membrane. Mitochondria are energy producers with their own membranes, not primarily involved in transporting cargo within the cell.