Biology
Grade-9
Easy

Question

What is ‘X’ in the diagram given below?

  1. Vitamin
  2. Protein
  3. Carbohydrate
  4. Lipid

hintHint:

The two main types of proteins are peripheral proteins and integral proteins. Integral proteins are integrated into the cell membrane. These proteins can also cross the membrane entirely and are referred to as transmembrane proteins.

The correct answer is: Protein


    • The two major integral membrane proteins of red blood cells, glycophorin and band 3, provide well-studied examples of transmembrane protein structure .
    • Glycophorin is a small glycoprotein of 131 amino acids, with a molecular weight of about 30,000, half of which is protein and half carbohydrate

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