The biorefinery of K. alvarezii can be exploited not only to produce carrageenan, but also to generate glucose for use in bio fuel production... The cell wall of red seaweed is constructed of cellulose and two kinds of long chain .......... For details consult Biotechnology 2016 9: 122 for Biofuels. https://doi.org/10.1186/s13068-016-0535
Red algae is used as a source of Agar agar, and Agarose is a purified form of the same. Agarose contains agarobiose which itself is polymer of alternate units of galactose 3, 6 anhydrogalactose. Agar is a thickning agent used in foods.