Which of the following statements are correct?1. Starch forms helical secondary structures while cellulose doesn’t have complex helices.2. Palmitic acid has 14- CH2 groups in its structure.3. Maltose is a disaccharide made up of glucose and fructose.4. The number of carbon and oxygen atoms present in glucose is less than those present in ribose.

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1 and 2

1, 2 and 3

1, 2, 3 and 4

3 and 4

answer is A.

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Detailed Solution

Maltose is made of two glucose units. Glucose has 6C atoms and 6 oxygen atoms where as ribose has 5 C atoms and 5 oxygen atoms.

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