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Recombination occurs when two molecus of dna exchange pieces of their genetic material with each other . 
Step by step
        
                    
             
        
        
        
Answer:
Is there more information ? 
Explanation:
 
        
             
        
        
        
<span>1.      
</span>They act as activators of transcription. This is
through increasing the affinity of the RNA polymerase on the promoter
<span>2.      
</span>They could act as repressors. This way, when
they bind to their active sites, they
repress the binding of the RNA polymerase on the promoter
<span>3.      
</span> Transcription factors at one site could affect transcription of genes on another site on the
DNA. The flexibility of the DNA (by forming loops) allows for this phenomenon.