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Thymine differs from Uracil in having

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Important Questions on Chemical Constituents of Living Cells

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Which bonds are indicated by X and Y in the given diagram?
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In an enzyme, active sites/pockets/crevices are present in
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Reducing sugar among the following is:
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Proteins act as
1. Catalysts
2. Building blocks of DNA
3. Structural components of cell membrane
4. Main source of energy in cellular respiration

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Match the following and choose the correct combination from the options given:

Column I

(Organic compounds)

Column II

(Examples)

A Fatty acid 1 Glutamic acid
B Phospholipid 2 Tryptophan
C Aromatic amino acid 3 Lecithin
D Acidic amino acid 4 Palmitic acid

 

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Given below is a comparison of elements present in non-living and living matter. Which of these is incorrect?
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Which of the following statements is not correct regarding chitin?
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What is the similarity between DNA and RNA?