 
			 
			MCQOPTIONS
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				| 1. | In cells having organelles, the steps of the Krebs cycle and the electron transport system occur in the | 
| A. | cell membrane | 
| B. | mitochondria | 
| C. | endoplasmic reticulum | 
| D. | none of these | 
| Answer» C. endoplasmic reticulum | |