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Each cell in our body contains DNA. We also have proteins and fats in our body. What is common among DNA, proteins and fats?
1. All contain acids.
2. All are inorganic.
3. All are salts.
4. All contains bases.

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Correct Answer - Option 1 : All contain acids.

Concept:

  • DNA:
    • Deoxyribonucleic acid (DNA) is a molecule made up of two polynucleotide chains that coil around each other to form a double helix and carry genetic instructions for all known organisms and viruses' formation, function, growth, and reproduction.
    • DNA is made up of Nucleic acids.
    • A nucleic acid is a polymeric macromolecule made up of repeated units of monomeric 'nucleotides' that contain a nitrogenous heterocyclic base (purine or pyrimidine), a pentose (five-carbon) sugar (ribose or 2′-deoxyribose), and one to three phosphate groups.
  • Proteins:
    • Proteins are big, complex molecules that play a number of important tasks in the human body.
    • They are essential for the structure, function, and control of the body's tissues and organs, and they do the majority of their activity in cells.
    • Amino acids, which are tiny chemical compounds with an alpha (central) carbon atom coupled to an amino group, a carboxyl group, a hydrogen atom, and a variable component termed a side chain, are the building blocks of proteins.
  • Fats:
    • Fat is a nutrient, and your body requires it for energy, vitamin absorption, and heart and brain health protection, much like protein and carbohydrates.
    • The backbone of a fat molecule is made up of glycerol, and the tails are made up of three fatty acids.
    • A fatty acid is made up of a long hydrocarbon chain connected to a carboxyl group, whereas glycerol is a tiny chemical molecule containing three hydroxyl (OH) groups.

Explanation:

  • DNA is made up of nucleic acids
  • Proteins are made up of amino acids.
  • Fats are made up of fatty acids.
  • All three biomolecules contain acids.
  • Hence, the correct answer to this question is - All contains acids. 

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