What do all four of these molecules have in common?

carbohydrates
proteins
lipids
nucleic acids

A.
They are essential to life.

B.
They carry signals.

C.
They are water soluble.

D.
They act as a source of energy.

Question

What do all four of these molecules have in common?  

carbohydrates
proteins
lipids
nucleic acids
   
 
  
 
  
 

 
 

  

  A. 
  They are essential to life.   
   

 
 

  

  B. 
  They carry signals.   
   

 
 

  

  C. 
  They are water soluble.   
   

 
 

  

  D. 
  They act as a source of energy.

nurali · Answer

i think They are essential to life.

anonymous · Answer

E. they're not history lol