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CBSE Class 12 · 2004 · Delhi Compartment · BiomoleculesShort Answer

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a) Describe the following, giving one example: nucleotides.
b) List four functions of carbohydrates in living organisms.

Solution

(a) A \textbf{nucleotide} is a nitrogenous base joined to a pentose sugar which also carries a phosphate — e.g. AMP (adenine–ribose–phosphate); nucleotides polymerise into DNA/RNA.
(b) Carbohydrates:
  1. fuel cells — glucose is the immediate energy source;
  2. store energy — starch (plants), glycogen (animals);
  3. build structure — cellulose cell walls;
  4. form part of nucleic acids — ribose and deoxyribose.

CBSE Class 12 Board · 2004 · Delhi Compartment · Subjective

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