After break down food may be used in the body to provide energy, as building blocks for tissue and cells, and can be stored for future use.
The body uses food for energy, for growth by making new cells and repairing or replacing tissues, may be stored by converting it into glycogen or fat before they can be stored. The main types of foods are carbohydrates, proteins and fats.  
        
             
        
        
        
Answer:
They are located in the ribosomes.
 
        
                    
             
        
        
        
From the options that factor that does not effect the rate of enzyme reaction is : ( D ) Amount of product.
Enzymes are substances found in organisms that catalyzes the rate of chemical reaction occurring in an organism. during the chemical reaction the enzyme remains intact and is not utilized during the process.  
Some of the process that may Inhibit the performance of an enzyme(s) includes ; 
- pH , 
- The substrate concentration,
- Temperature and
- The concentration of the enzyme.  
The amount of the product does not affect the performance rate of the enzyme because enzymes functions in chemical reactions and not physical reactions 
Hence we can conclude that the factor that does not effect the rate of enzyme reaction is the  Amount of product
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