This organelle contains the enzyme glucose-6-phosphatase, which catalyzes the final step of gluconeogenesis.  
This organelle contains the enzyme glucose-6-phosphatase, which catalyzes the final step of gluconeogenesis.  One form of this organelle stores and pumps calcium ions and is found in smooth muscle. Although it is not the Golgi complex, COPI marks vesicles to be transported here, while COPII marks vesicles to be sent from this organelle. Newly-synthesized proteins are bound to BiP in this organelle, which comes in a "sarcoplasmic" type.  For 10 points, name this organelle which comes in smooth and rough varieties, the latter of which has ribosomes on its surface.
This organelle contains the enzyme glucose-6-phosphatase, which catalyzes the final step of gluconeogenesis.  
endoplasmic reticulum [or ER; accept sarcoplasmic reticulum; accept rough ER and smooth ER  before mentioned]