Question

which statement is correct about rough er and smooth er? (1 point)

rough er contains ribosomes, and smooth er transports materials other than proteins

rough er transports materials other than proteins, and smooth er contains ribosomes

rough er contains ribosomes, and smooth er transports proteins.

rough er transports proteins, and smooth er contains ribosomes.

Explanation:

To determine the correct statement, recall the functions and structures of rough and smooth endoplasmic reticulum (ER):

• Rough ER has ribosomes on its surface (giving it a "rough" appearance) and is involved in protein synthesis and transport.
• Smooth ER lacks ribosomes and is involved in lipid synthesis, detoxification, and transporting non - protein substances (like lipids).

Now analyze each option:

• First option: "Rough ER contains ribosomes, and smooth ER transports materials other than proteins" matches the known functions/structures.
• Second option: Smooth ER does not contain ribosomes, and rough ER does not transport non - protein materials primarily, so this is incorrect.
• Third option: Smooth ER does not transport proteins (that's rough ER's role), so this is incorrect.
• Fourth option: Smooth ER does not contain ribosomes, and rough ER's main transport is of proteins, but the description of smooth ER here is wrong.

Answer:

A. Rough ER contains ribosomes, and smooth ER transports materials other than proteins