Answer: 
DNA polymerase
Explanation:
DNA polymerase enzyme catalyses the reaction of adding nucleotide to growing complementary daughter strand of DNA in the direction of 5' → 3' during elongation in the process of replication. This process requires energy which is taken from nucleotides with three phosphate groups in their backbone similar to ATP (adenine triphosphate)
DNA Replication is when DNA multiplies and make exact copies of itself as part of gene transfer.
 
        
             
        
        
        
The type of lipid that estrogen is testosterone 
        
                    
             
        
        
        
 Different enzymes have specific active sites which can only catalyze one <span>substrate. Enzyme-substrate complexes are produced only when the substrate fits into the active site :)</span>
        
                    
             
        
        
        
Answer:
Most adult amphibians can breathe both through cutaneous respiration and buccal pumping though some also retain gills as adults.
Explanation:
 
        
             
        
        
        
Sour receptors occur primarily along the sides of the tongue and are stimulated mainly by acids. Salt receptors are most common in the tip and upper front portion of the tongue. They are stimulated mainly by inorganic salts. Bitter receptors are located toward the back of the tongue 
hopefully this helps but i could be really wrong lol