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Answer the following: The structure of amino acid exists in the following two forms: The above…

Chemistry20253 marksShort answer
Answer the following:
(i)[1.0]
The structure of amino acid exists in the following two forms: $\begin{matrix} \text{O} \\ || \\ \text{R}-\text{CH}-\text{C}-\text{OH} \\ | \\ \text{NH}_2 \end{matrix} \quad \xrightleftharpoons{\text{aqueous}} \quad \begin{matrix} \text{O} \\ || \\ \text{R}-\text{CH}-\text{C}-\text{O}^- \\ | \\ ^+\text{NH}_3 \end{matrix}$ The above structure is an example of ____. If the side chain $\text{R}$ is replaced by hydrogen, the amino acid is known as ____.
(ii)[1.0]
Janice notices that her gums bleed while brushing and eating food. Name the water soluble vitamin which she should consume to prevent bleeding of gums.
(iii)[1.0]
Which linkage holds two units of monosaccharides in a disaccharide?

Answer

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Proteins

From ISC 2025 Chemistry Paper 1, question 17.