Which of the following acids is absent in gram leaves?
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Answer: D. Both b & c
Explanation
Gram leaves exude malic and oxalic acids, meaning other specific acids like sulfuric and oleic are absent. Chickpea foliage is well known for accumulating organic acid exudates on leaf surfaces. Mineral acids and specific fatty acids do not form part of the natural chemical composition of gram leaves. Chickpea plants secrete acidic droplets from glandular hairs to deter insect pests and grazing herbivores. Organic acids such as malic acid account for the sour taste and medicinal properties of gram leaf exudates. Biochemical analysis confirms the complete absence of strong mineral acids or rancid fatty acids in plant foliage.
Puric acid is an outdated term and not the primary organic acid exuded by chickpea foliage. Sulphuric acid is a corrosive mineral acid entirely absent from normal plant leaf metabolic pathways. Olic acid is a misnomer for oleic acid, which is a fatty acid found in oils, not chickpea leaves.
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