The nuclear substance composed of histone proteins and DNA is:
a. Chromatin
b. The nucleolus
c. Nucleoplasm
d. Nuclear pores

How does the rough endoplasmic reticulum (ER) differ from the smooth endoplasmic reticulum (ER)?

What is the primary difference between rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER)?

What is the primary function of the smooth endoplasmic reticulum in eukaryotic cells?

The membranes of the endoplasmic reticulum form which of the following structures involved in protein secretion?

A researcher made an interesting observation about a protein made by the rough endoplasmic reticulum and eventually found in a cell's plasma membrane. The protein in the plasma membrane was actually slightly different from the protein made in the ER. The protein was probably altered in the __________.

Consider a protein that is made in the rough endoplasmic reticulum. You observe that when the synthesis of the protein is completed, the protein is located in the ER membrane. Where else in the cell might this protein be found?

A protein that ultimately functions in the plasma membrane of a cell is most likely to have been synthesized __________.