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NTA Abhyas NEET2020ChemistryBiomoleculesPractice

The following biomolecules are arranged in increasing order of their average percentage composition of the total cellular mass. Which of these orders is correct?

Options

  1. AIons < Lipids< Carbohydrates < Nucleic acids < Proteins
  2. BLipids < Ions< Carbohydrates < Nucleic acids < Proteins
  3. CIons < Carbohydrates< Lipids < Nucleic acids < Proteins
  4. DIons < Nucleic acids < Carbohydrates < Lipids < Proteins

Correct answer

A. Ions < Lipids< Carbohydrates < Nucleic acids < Proteins

Step-by-step solution

Maximum percentage is water in the cells. This is around 70-90%. Out of macromolecules proteins are highest that accounts for 10-15% of total cellular mass. This is followed by nucleic acids (5-7%) and then carbohydrates (3%). Lipids and ions constitute only 2% and 1% respectively.

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