Natural Polymers

The video explains polymers, large molecules made of repeating subunits, and their roles in nature. It covers cellulose in plants, starch composition, and the rigidity of plant structures. The process of making paper from cellulose is discussed, highlighting the separation of lignin. DNA, a polymer of nucleotides, is described as the genetic blueprint, while proteins, polymers of amino acids, are essential for various functions. The video also explores natural polymers like chitin in crustaceans and fungi, silk from silkworms, and rubber from trees, emphasizing their diverse applications and significance.

What is a polymer?

• A molecule that cannot form chains

• A molecule made of a single type of atom

• A large molecule made of repeating monomer subunits

• A small molecule made of different subunits

What is the main component of plant cell walls?

• Starch

• Lignin

• Cellulose

• Protein

Why is lignin important in trees?

• It gives rigidity and strength to the trunk

• It helps in photosynthesis

• It provides flexibility to the branches

• It stores nutrients

What is DNA composed of?

• Glucose molecules

• Nucleotides

• Fatty acids

• Amino acids

Which protein is responsible for transporting oxygen in the blood?

• Myosin

• Collagen

• Keratin

• Hemoglobin

What is chitin primarily found in?

• Plant cell walls

• Animal bones

• Crustacean shells

• Human skin

What is the process of adding sulfur to rubber called?

• Cross-linking

• Polymerization

• Vulcanization

• Sulfation