Answer:
 protons, neutrons, and electrons.
 
        
                    
             
        
        
        
Answer:
Translation
Explanation:
Translation is the second process that occurs in protein synthesis. It is the process whereby mRNA template is used to synthesize an amino acid sequence, which eventually becomes a protein. 
The process of translation occurs in the cytoplasm (specifically in the ribosome). As depicted in this image, the mRNA produced during transcription is transported out of the nucleus into the cytoplasm. A RNA molecule called tRNA reads the mRNA sequence (codon by codon) and carries corresponding amino acid into the growing amino acid sequence. 
Hence, according to this question, the process occuring at B according to this image is TRANSLATION. 
 
        
             
        
        
        
B. Is characterized by four different zones.
 
        
             
        
        
        
Because you might have just done something different with the experiment and messed up someway during the test
 
        
                    
             
        
        
        
DNA is a negatively-charged molecule. Also cell membranes are negatively charged. The problem would be how to push this charges together? I<span>f you put some CaCl2 into the mixture, the CaCl2 will "split" giving 2Cl- and Ca2+. This last ion will be attracted by the negatively charged DNA and will "cover" it, hiding its negative charge. Hope this answers the question.</span>