Polysaccharides and Their Functions

This video tutorial explores the structure and properties of polysaccharides, focusing on starch, glycogen, and cellulose. Starch is composed of amylose and amylopectin, both made of alpha glucose, with amylose forming a coiled structure and amylopectin having branches. Glycogen, similar to starch, is a storage molecule found in mammals. Cellulose, made of beta glucose, forms strong fibers due to hydrogen bonds, providing high tensile strength for plant cell walls.

What are the main polysaccharides discussed in this session?

• Glycogen, Sucrose, and Cellulose

• Starch, Glycogen, and Fructose

• Starch, Sucrose, and Cellulose

• Starch, Glycogen, and Cellulose

What type of bonds are found in amylose?

• Beta 1 to 4 glycosidic bonds

• Alpha 1 to 4 glycosidic bonds

• Alpha 1 to 6 glycosidic bonds

• Beta 1 to 6 glycosidic bonds

What structural feature of amylopectin allows for efficient energy release?

• Cross-linked structure

• Linear structure

• Coiled structure

• Branched structure

Which polysaccharide is primarily stored in mammalian livers?

• Starch

• Cellulose

• Sucrose

• Glycogen

What is the primary monomer in both starch and glycogen?

• Alpha glucose

• Fructose

• Galactose

• Beta glucose

What type of glucose forms the structure of cellulose?

• Galactose

• Fructose

• Beta glucose

• Alpha glucose

How do beta glucose molecules orient themselves in cellulose?

• All in the same direction

• Alternating 180 degrees

• Randomly

• In a spiral

What type of strength is provided by the hydrogen bonds in cellulose?

• Tensile strength

• Elastic strength

• Compressive strength

• Shear strength

What is the role of cellulose in plant cells?

• Energy storage

• Nutrient transport

• Structural support

• Photosynthesis

Which of the following does not affect osmotic potential?

• Amylopectin

• Glycogen

• Amylose

• Cellulose