Eukaryotic cells manufacture cytoskeletal proteins, which help to maintain cell shapes and functions. What would you predict about these proteins?
A) They initially contain signal sequences that allow their entrance into the endoplasmic reticulum.
B) They are manufactured on free ribosomes in the cytoplasm.
C) They are glycosylated in the Golgi apparatus.
D) They travel to the nucleus in a transport vesicle with a specific signal.

Question

Quizplus · Accepted Answer

Cytoskeletal proteins are generally not secretory proteins, so they do not contain signal sequences that target them to the endoplasmic reticulum. Instead, they are typically manufactured on free ribosomes in the cytoplasm. The other options (C and D) are also less likely because cytoskeletal proteins are not usually modified in the Golgi or transported to the nucleus.

Eukaryotic Cells Manufacture Cytoskeletal Proteins, Which Help to Maintain Cell