Cation-exchange chromatography is used when the molecule of interest is positively charged on the neutral pH. The stationary phase is than negatively charged and positively charged molecules are loaded to be attracted to it. So, positively charged peptides will elute the last.
 
        
             
        
        
        
Sun, ..soil water, climate .. green plants.. herbivorous animals.. carnivorous animals.. decomposers
        
             
        
        
        
Is a branch of science concerned with the description, prediction, and understanding of natural phenomena, based on observational and empirical evidence.
        
             
        
        
        
The correct answer is: B) continuous transcription of the structural gene controlled by that regulator
A regulatory gene is gene that encodes for a protein, such as a repressor (or activators) that controls the transcription of another gene or group of genes.
The regulatory gene of a repressible operon encodes for the repressor that inhibits gene transcription. So, when that repressor isn’t active, transcription occurs continuously.
 
        
             
        
        
        
Answer:
the ratio of the surface area to the volume is 1:2