The nonselective, passive process performed by the glomerulus that forms blood plasma without blood proteins is called filtration. 
<span>Glomerular filtration is the first step in making urine which includes the<span> separation of the liquid part of the blood (plasma) from the blood cells</span>. Glomerulus of the kidneys (a tuft of blood capillaries)<span> filters excess fluid and waste products out of the blood into the urine collecting tubules of the kidney and thus eliminates it out of the body.</span></span>
        
             
        
        
        
It’s actually bacterial DNA
        
             
        
        
        
Cos they were created like that
        
                    
             
        
        
        
When protein enters the stomach, it begins to break down thanks to t<span>iny glands  of the stomach which produces juices to help digest food</span>, but only when it enters the small intestine does the protein molecules break down into amino acids.
So the Small Intestine is the answer.
Have a great day! :)