Nucleus - S - Largest organelle. Surrounded by a nuclear envelope. Made up of two membranes with fluid between them. Nuclear pores go through nuclear envelope which are large enough to allow relatively large molecules to enter. Dense spherical structure called the nucleolus, inside the nucleus.
F - Contains genetic info in DNA of chromosomes. (Separated from cytoplasm by nuclear envelope with pores for communication between nucleus + cytoplasm). Nucleolus makes RNA and ribosomes (which make proteins at the cytoplasm).
ER - S - Series of flattened membrane-bound sacs called cisternae. They are continuous with outer nuclear membrane. RER has ribosomes, SER doesnt.
F - RER transports proteins made on attached ribosomes to golgi apparatus. SER-Makes triglycerides (fats), phospholipids and cholesterol.
Golgi Apparatus - S - A stack of membrane-bound, flattened sacs.
F - Modifies and packages proteins, makes secretory vesicles and lysosomes.
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