Biomolecules

Write the important structural and functional differences between DNA and RNA.

DNA	RNA
1.DNA exists as double helix.	1. RNA exists-as single chain.
2. It is high polymer containing 2500 to 5000 nucleotides.	2. It is relatively smaller polymer containing 75 to 1200 nucleotides.
3.In DNA. the sugar is deoxyribose.	3.In RNA the sugar unit is ribose.
4. The base units in DNA are adenine, guanine, cytosine and thymine.	4. The base units in RNA are adenine, guanine, cytosine and uracil.
5.Uracil is absent in DNA.	5. Thymine is absent in RNA.
6. The hydrolysis products of DNA are phosphoric acid, deoxyribose, the bases A, G, C and T.	6. The hydrolysis products of RNA are phosphoric acid, ribose and bases A.G, C and U.

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Name the deficiency diseases caused due to lack of the vitamin A, C, E, B₁, B₁₂ B₆and K.

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Compare α-D glucose with β-D glucose.

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State significance of primary and secondary structures of proteins.

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The two strands in DNA are not identical but are complimentary. Explain.

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What are nucleic acids? Explain their functions in the synthesis of proteins.

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The two strands in DNA are not identical but are complimentary. Explain.

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What are the different types of RNA found in the cells of organisms? State the functions of each type.

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State differences between primary and secondary structure of a protein.

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State differences between α-helix and β-pleated sheet structure.

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