D) All of the above
That's why we're called Carbon-Based Lifeforms
        
                    
             
        
        
        
Proteostasis is mediated by chaperone proteins and protease systems, together with cellular clearance mechanisms such as autophagy and lysosomal degradation.
Chaperone proteins control assembly and inaccurate folding by binding to and stabilizing partly or completely unfolded protein polypeptides till the polypeptide chain is completely synthesized. Chaperone proteins also confirm the stability of unfolded polypeptide chains as they are being translocated into the subcellular organelles.
To learn more about Chaperone proteins here 
brainly.com/question/28256423
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Answer:
Internal and external regulators are two types of proteins that regulate the cell cycle. Internal regulators allow the cell cycle to proceed only after certain events occur. External regulators speed up or slow down the cell cycle.
Explanation:
I hope this helps :)
 
        
             
        
        
        
Because they are in different galaxies. I hope this helps! :)
        
             
        
        
        
I think the answer is A hope this helps