Helicase "unzips" the two strands of DNA. During DNA replication.
        
                    
             
        
        
        
Answer: Sequence of Amino acids
Explanation: The shape of a protein is determined by its primary structure (sequence of amino acids). The sequence of amino acids in a protein is determined by the sequence of nucleotides in the gene (DNA) encoding it.
 
        
             
        
        
        
Answer:
the correct answer is enzymes 
Explanation:
enzyme act as catalyst and is a biological molecule which within the cell membrane can speed up or increase the rate of biological reaction without affecting itself and is obtained unchanged at the end of reaction 
 
        
                    
             
        
        
        
The answer is Ocean Current s..