proteins can change shape allowing certain materials to move in or out of the cell. A group of proteins embedded in the membrane called can speed up reactions within the cell.

Which of the following statements about polysaccharides are correct? choose all that apply.cellulose is a linear, unbranched polymer of glucose monomers.starch is typically more highly branched than glycogen.cellulose is a major component of both plant and animal cells.glycogen is a storage form of glucose in animal cells.glycogen is the most abundant organic compound on earth.starch and cellulose are found in plants.