What is the structural difference between HDP and LDP? How does the structure account for different behaviour and nature hence use of polymer?

What is the structural difference between HOP and LDP? How does the structure account for different behaviour and nature, hence the use of a polymer?

What is the structural difference between soap and detergent?

What are the three structural differences between RNA and DNA?

What are the three structural differences between RNA and DNA?

How do the structural differences between HDPE and LDPE account for the difference in nature, behaviour and use.

What is the basic structural difference between starch and cellulose ?