Indicate True (T) and False (F) Statements Below Regarding Glycosaminoglycan

Short Answer

Indicate true (T) and false (F) statements below regarding glycosaminoglycan chains in the extracellular matrix. Your answer would be a four-letter string composed of letters T and F only, e.g. TFTT.
( ) They are highly branched polysaccharides.
( ) They are strongly hydrophilic and absorb a large amount of water.
( ) They all contain N-acetylglucosamine or N-acetylgalactosamine.
( ) They are highly positively charged.