A section of DNA that provides information for one protein is called the ________.

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RRB ALP CBT I 31 Aug 2018 Shift 1 Official Paper
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  1. gene
  2. chromosome
  3. lysosome
  4. nucleus

Answer (Detailed Solution Below)

Option 1 : gene
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The correct answer is gene

Key Points

  • The chromosomes of bacteria are constituted by circular and double-stranded DNA molecules.
  • DNA (Deoxyribonucleic Acid) is a long polymeric hereditary structure found in almost all living organisms.
    • It consists of three components a nitrogenous base, a pentose sugar and a phosphate group.
  • Gene is made of DNA and is a basic functional unit of hereditary and it provides information for a protein. Hence option 1 is correct.
  • A gene mutation is an alteration in the sequence of bases of DNA.

Additional Information

  • Chromosomes are threadlike structures made of protein and a single DNA molecule that carry genome information between cells. 
  • Lysosomes or suicidal bags are membrane-enclosed organelles that carry hydrolytic enzymes which are able to digest every organic substance in the cell.
    • They help in the body's defence system, replacing dead cells with new cells and providing intracellular and extracellular digestion.
  • The nucleus is an important spherical or elliptical shaped component in the living cell which is located in the centre of the cell.
    • It acts as a controlling centre and is also called the Brain of the cell.
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