Ascorbic acid is a?

Appeared in: NCL (MP) Nursing Officer - 2020

Explanation

Ascorbic acid is the scientific name for Vitamin C, which is classified as an essential water-soluble vitamin.
Humans and other primates cannot synthesize ascorbic acid due to the lack of a specific enzyme, L-gulonolactone oxidase, and must obtain it from their diet.
Its primary roles include acting as a coenzyme in collagen synthesis, functioning as a potent antioxidant, and enhancing iron absorption.
Deficiency leads to a condition called scurvy, highlighting its essential role in maintaining connective tissue integrity.

Option A: Proteins are large macromolecules composed of amino acid chains. Ascorbic acid is a small organic molecule with a structure similar to a monosaccharide, not a protein.
Option C: Enzymes are biological catalysts, which are almost exclusively proteins. Ascorbic acid functions as a cofactor for several enzymes (like prolyl hydroxylase) but is not an enzyme itself.
Option D: A fluid is a state of matter (a liquid or a gas) that can flow. Ascorbic acid is a solid chemical compound, although it is soluble in bodily fluids like water.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Biochemical classification of Ascorbic Acid as background academic context rather than a clinical decision trigger.
Nurses encourage patients, especially those recovering from surgery, to consume Vitamin C-rich foods to promote wound healing through effective collagen synthesis.
When administering iron supplements for anemia, nurses often advise taking them with a source of Vitamin C (like orange juice) to enhance iron absorption.
Assessing for signs of Vitamin C deficiency (scurvy), such as bleeding gums, easy bruising, and joint pain, is important in at-risk populations like the elderly, malnourished individuals, and those with chronic alcoholism.

How to Approach the Question

First, identify the key term in the question, which is 'Ascorbic acid'.
Access your foundational knowledge of biochemistry and nutrition to recall the common name and classification of this substance.
Recognize that 'Ascorbic acid' is the scientific name for Vitamin C.
Systematically evaluate each option against this knowledge. A protein is an amino acid polymer, an enzyme is a biological catalyst, and a fluid is a state of matter.
Conclude that 'Vitamin' is the correct biochemical classification for Ascorbic acid, as it is an essential organic nutrient required in small amounts.

Concept Tested & Keywords

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E6 Biochemistry U Satyanarayana— Part 1 (pp 26-420 of 840) p. 123-125

E6 Harper's Illustrated Biochemistry2023 (pp 26-793 of 813) p. 531-533

Practise the full NCL (MP) Nursing Officer - 2020

Attempt every question from this paper in a timed mock, then review the full solution for each one.