JEE Main · 2021 · Shift-ImediumBIO-039

Identify the incorrect statement from the following:

Biomolecules · Class 12 · JEE Main Previous Year Question

Question

Identify the incorrect statement from the following:

Options
  1. a

    Amylose is a branched chain polymer of glucose

  2. b

    Starch is a polymer of α-D-glucose\alpha\text{-D-glucose}

  3. c

    β\beta-Glycosidic linkage makes cellulose polymer

  4. d

    Glycogen is called as animal starch

Correct Answera

Amylose is a branched chain polymer of glucose

Detailed Solution

Step 1: Polysaccharide Branching — Amylose is a long, unbranched linear molecule composed of glucose units. In contrast, amylopectin and glycogen are branched.

Step 2: Analyzing Other Statements — Starch is a polymer of α-glucose\alpha\text{-glucose}, cellulose has β\beta-linkages, and glycogen is indeed known as animal starch. These are all correct.

Step 3: Incorrect Statement — Statement (a) mischaracterizes amylose as branched, making it the incorrect choice.

Key Point: Starch consists of both linear amylose and branched amylopectin.

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