Compared to the cytosol, which of the following is generally true about the lumen of the endoplasmic reticulum in our cells?
A) It has a higher pH.
B) It has a more reducing environment.
C) It has a much higher calcium ion concentration.
D) It has a higher density of ribosomes.
E) All of the above.

Question

Quizplus · Accepted Answer

While it is usually slightly more acidic and more oxidizing than the cytosol, the lumen of the ER is also distinct by containing a concentration of calcium orders of magnitude higher than that of the cytosol. There are no ribosomes in the ER lumen.

Compared to the Cytosol, Which of the Following Is Generally