Cholesterol is a waxy substance found in blood.
        
             
        
        
        
Its a mollusc (i think that helps?)
        
             
        
        
        
Yeast makes the dough rise
        
             
        
        
        
Answer: 
Photosynthesis and Oxidative Phosphorylation
Explanation:
The mitochondria uses oxygen within the cell to convert the chemical energy we get from the foods we eat, this makes energy in a usable form.
Chloroplasts help plant cells undergo the process of photosynthesis