Which of the following statements is/are false regarding carbohydrates?

P. Rings with five and six atoms monosaccharides are called pyranose and furanose forms, respectively. Q. In polysaccharides, monosaccharide units are joined by peptide bond. R. In humans, carbohydrate is stored in liver in the form of glycogen.

This is the correct answer. Monosaccharides are the major source of fuel for metabolism, being used both as an energy source (glucose being the most important in nature) and in biosynthesis. When monosaccharides are not immediately needed by many cells they are often converted to more space-efficient forms, often polysaccharides. In many animals, including humans, this storage form is glycogen, especially in liver and muscle cells.