This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
In which of the following polysaccharides, monomers are linked by a beta-glycosidic bond 
Select and explain. 
A. Amylose, B. Amylopectin, C. Glycogen, D. Cellulose
D: Cellulose
Answer: D: Cellulose 
Explanation: Cellulose is the chief constituent of plant cell walls. It is insoluble and consists of b-d-glucopyranose units linked by b1 - 4 bonds to form long, straight chains strengthened by cross-linking hydrogen bonds.Ref: Harper&;s Biochemistry; 30th edition; Chapter 15; Carbohydrates of Physiological Significance