The answer is A.the site on an enzyme where the substrate binds
        
             
        
        
        
Answer:
The synchronous orbit appears to make the moon more vulnerable to meteor strikes 
 
        
             
        
        
        
Answer:
The frequency of the sound.Hope this helps btw
Explanation:
You would need to know how fast the sound waves go through the air.
 
        
             
        
        
        
Answer: 
Peptide bonds and Amino Acids
Explanation:
Primary structure. The primary structure of a protein refers to the sequence of amino acids in the polypeptide chain. The primary structure is held together by peptide bonds that are made during the process of protein biosynthesis.