Yes, rennin<span>. [ren´in].: the milk-curdling enzyme found in the gastric juice of human infants ... was formerly used extensively as a </span>curdling agent<span> by the cheese industry.</span>
        
             
        
        
        
I believe the answer would be “B” Srry not good with science
        
             
        
        
        
Lungs, lung cells, lung tissues
        
             
        
        
        
Answer: 
DNA
Explanation:
Thymine is one of the four nucleobases that pairs with adenine to make up DNA, also called 5-methyluracil. It is replaced by uracil to make RNA molecules during transcription.
Theferore the unknown chemical analyzed was DNA because thymine is found in DNA and not in RNA molecules.
 
        
             
        
        
        
an organism is resistant to a chemical if it has a gene that protects it from the chemical.