Answer the following questions: (i) Why are vitamin A and vitanmin C essential for us? (ii) What is the difference between a nucleoside and a nucleotide?

Answer the following questions: (i) Why are vitamin A and vitanmin C e

1.	Answer the following questions: (i) Why are vitamin A and vitanmin C essential for us? (ii) What is the difference between a nucleoside and a nucleotide?
Answer» (i)Vitamin A is required for growth and vision in human beings and increase resistance to disease Vitamin C: It increases the resistacne of body to wards disease maintain healthg skin and heps cuts and abrasions to heal properly (ii) A nucleoside consists of a netirogenouss base covalently attached to a sugar (ribose or deoxyrobose) but without the phosphate group. A mucleotide consists of a nitrogenous base a sugar (ribose or deoxuyribose) and one to three phosphate groups Nucleoside = sugar + Base Nucleotide =Sugar +Base +Phosphate

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
Rerrange the following in an increasing order of their basic strengths: `C_(6)H_(5)NH_(2),C_(6)H_(5)N(CH_(3))_(2),(C_(6)H_(5))_(2)` NH and `CH_(3)NH_(2)`.
(b) Estimate the minimum potential difference needed to reduce `AI_(2)O_(3)` at `500^(@)C` The gibbs energy change for the decomposition reaction `2/3AI_(2)O_(3)rarr4/3AI+O_(2)`is 960 kJ (F=96500 C `mol^(-1))`

Answer the following questions: (i) Why are vitamin A and vitanmin C essential for us? (ii) What is the difference between a nucleoside and a nucleotide?

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