Answer:
Viruses rely on the cells of other organisms to survive and reproduce, because they can't capture or store energy themselves
 
        
             
        
        
        
Enzymes lower the activation for chemical reactions so they get a  faster *Jump Start.* Once this happens these reactions can happen a lot faster than similar reactions or the same reaction
        
                    
             
        
        
        
Answer:
An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host. 
 
        
             
        
        
        
Answer:
A
Explanation:
This is because those items are the actual required ones when it comes to building the molecule DNA.
 
        
             
        
        
        
Answer:
 the complementary nucleotide to adenine.
Explanation:
mRNA is formed as a complementary strand to one of the two strands of the DNA. Three of the four nitrogenous bases that make up RNA — adenine (A), cytosine (C), and guanine (G) — are also found in DNA. In RNA, however, a base called uracil (U) replaces thymine (T) as