Biopolymers and Their Structures

The video tutorial discusses biopolymers, which are polymers of biological origin. It classifies biopolymers into three types: polynucleotides, polypeptides, and polysaccharides. The focus is on polysaccharides, specifically starch and cellulose. Starch is composed of amylose and amylopectin, with various applications in food and pharmaceuticals. The video explains how to draw the structure of starch, highlighting the alpha linkage of glucose units. It also covers cellulose, emphasizing its linear structure and mechanical strength compared to starch.

What is a biopolymer?

• A polymer that is always water-soluble

• A polymer with no biological origin

• A synthetic polymer

• A polymer produced by living organisms

Which of the following is NOT a type of biopolymer?

• Polynucleotide

• Polysaccharide

• Polyethylene

• Polypeptide

What are the two main components of starch?

• Glucose and Fructose

• Lignin and Pectin

• Cellulose and Hemicellulose

• Amylose and Amylopectin

Which component of starch is water-soluble?

• Both Amylose and Amylopectin

• Amylopectin

• Neither Amylose nor Amylopectin

• Amylose

What type of linkage is found in amylose?

• Alpha C1 to C4

• Beta C1 to C4

• Alpha C1 to C6

• Beta C1 to C6

In which industry is starch commonly used as a tablet binder?

• Food processing

• Construction

• Pharmaceutical

• Textile

What is the main structural difference between amylose and amylopectin?

• Amylose is branched, amylopectin is linear

• Amylose contains fructose, amylopectin contains glucose

• Amylose is linear, amylopectin is branched

• Amylose is water-soluble, amylopectin is not

What is the primary use of cellulose in plants?

• Energy storage

• Water transport

• Providing structural support

• Photosynthesis

Which type of linkage is found in cellulose?

• Alpha C1 to C6

• Alpha C1 to C4

• Beta C1 to C6

• Beta C1 to C4

Why is cellulose more rigid than starch?

• It contains more glucose units

• It has a branched structure

• It has a linear structure with close packing

• It is water-soluble