Consider the following statements regarding the endoplasmic reticulum (ER) and its functions:
A. The rough ER is primarily involved in lipid synthesis.
B. The smooth ER is involved in the synthesis of membrane proteins.
C. Calcium storage and release are important functions of the smooth ER.
D. Protein folding and post-translational modifications occur in the rough ER.
Which option represents the correct statements about the endoplasmic reticulum?
1
A and C
2
B and D
3
C and D
4
A and B