Answer:
Amino acids with non-polar side chains. 
Explanation:
The class of proteins that is unable to form hydrogen bonds with water are the amino acids with non- polar side chains. This class includes the amino acids 
Alanine
Valine
Leucine
Isoleucine
 Proline 
Phenylalanine
Cysteine 
 Methionine
 Tryptophan 
These are the nine proteins which are considered to be strongly hydrophobic. All these amino acids are hydrophobic in nature due to their side chains. Glycine is not added to this list as it does not have a side chain. 
 
        
             
        
        
        
Atoms are the smallest unit of non-living things and CELLS are the smallest unit of living things.
        
                    
             
        
        
        
False. I don't know how to explain it but they don't classify as living.
        
             
        
        
        
  <span>They do not possess any skeleton at al</span>
        
             
        
        
        
if I'm being honest I think it would be uhm C