Answer:
Electrophoresis is a laboratory technique used to separate DNA, RNA, or protein molecules based on their size and electrical charge. An electric current is used to move molecules to be separated through a gel. ... The conditions used during electrophoresis can be adjusted to separate molecules in a desired size range.
 
        
                    
             
        
        
        
Answer:
The most appropriate answer would be A. The particle is a virus because it does not use energy and cannot reproduce by itself.  
Virus is defined as a small infectious agent that carry its own genetic material (DNA or RNA) but divides only in the living cells of other organisms (bacteria, human, animals, plants etc).
They are acellular in nature and thus are not able to reproduce on their own. They use the metabolism and machinery of the host cell in order to produce and assemble multiple copies of themselves in a cell.
They attach to the specific binding site of their target cells and inject their genetic material into the cell. The host cell's machinery is then used to replicate, transcribe and translate viral genetic material.
The viral genome produced are assembled in the protein cascade. They are then released by causing bursting of the infected cell. 
 
        
             
        
        
        
<h2>Therapeutic response</h2>
Explanation:
Therapeutic response can be explained as:
The nurse should recognize the woman's grief and its significance
Asking her about plans for another baby is denying the loss of the other infant
Pointing out the health of another baby will disturb her feelings, repeatedly stating that the the woman has lost a twin will harm her emotionally and mentally 
Here, woman needs psychosocial integrity which will help her heal faster and this is the basic health need she requires at this particular period of time
 
        
        
        
Economics - is the social science that describes the factors that determine the production, distribution and consumption of goods and services