Class 12 Exam > Class 12 Questions > The sugar constituent of DNA is.a)D – 2...
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The sugar constituent of DNA is.
- a)D – 2 – deoxy ribose
- b)D – lactose
- c)D – glucose
- d)D – ribose
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D ...
Sugar constituent of DNA is D-2-deoxy ribose.
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The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D ...
Explanation:
Sugar Constituent of DNA:
DNA (deoxyribonucleic acid) is a molecule that carries the genetic instructions for the development, functioning, growth, and reproduction of all living organisms. The sugar constituent present in DNA is 2-deoxyribose.
2-Deoxyribose:
2-Deoxyribose is a pentose sugar that forms the backbone of DNA. It is a modified form of ribose sugar with one less oxygen atom, hence the term "deoxy." This modification helps in the stability of the DNA molecule and prevents degradation.
Difference from Ribose:
The main difference between deoxyribose and ribose (which is found in RNA) is the presence of a hydroxyl group (-OH) on the 2' carbon of ribose, which is absent in deoxyribose. This difference contributes to the stability and function of DNA in genetic information storage.
Function in DNA:
The 2-deoxyribose sugar molecules link together with phosphate groups to form the backbone of the DNA double helix. The nitrogenous bases adenine, thymine, cytosine, and guanine are attached to the deoxyribose sugar, forming the base pairs that encode genetic information.
Therefore, the correct sugar constituent of DNA is 2-deoxyribose, which plays a crucial role in the structure and function of the DNA molecule.
Sugar Constituent of DNA:
DNA (deoxyribonucleic acid) is a molecule that carries the genetic instructions for the development, functioning, growth, and reproduction of all living organisms. The sugar constituent present in DNA is 2-deoxyribose.
2-Deoxyribose:
2-Deoxyribose is a pentose sugar that forms the backbone of DNA. It is a modified form of ribose sugar with one less oxygen atom, hence the term "deoxy." This modification helps in the stability of the DNA molecule and prevents degradation.
Difference from Ribose:
The main difference between deoxyribose and ribose (which is found in RNA) is the presence of a hydroxyl group (-OH) on the 2' carbon of ribose, which is absent in deoxyribose. This difference contributes to the stability and function of DNA in genetic information storage.
Function in DNA:
The 2-deoxyribose sugar molecules link together with phosphate groups to form the backbone of the DNA double helix. The nitrogenous bases adenine, thymine, cytosine, and guanine are attached to the deoxyribose sugar, forming the base pairs that encode genetic information.
Therefore, the correct sugar constituent of DNA is 2-deoxyribose, which plays a crucial role in the structure and function of the DNA molecule.
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The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D ...
D-2-deoxyribose is a precursor to the nucleic acid DNA. 2-deoxyribose is an aldopentose, that is, a monosaccharide with five carbon atoms and having an aldehyde functional group.
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The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D – lactosec)D – glucosed)D – riboseCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D – lactosec)D – glucosed)D – riboseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D – lactosec)D – glucosed)D – riboseCorrect answer is option 'A'. Can you explain this answer?.
The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D – lactosec)D – glucosed)D – riboseCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D – lactosec)D – glucosed)D – riboseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The sugar constituent of DNA is.a)D – 2 – deoxy riboseb)D – lactosec)D – glucosed)D – riboseCorrect answer is option 'A'. Can you explain this answer?.
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