MCQs Quiz

Endogenous antioxidants – enzymatic and non-enzymatic systems MCQs With Answer Endogenous antioxidants form an integrated defense network against oxidative stress and reactive oxygen species (ROS) in the body. This topic covers enzymatic antioxidants such as superoxide dismutase (SOD), catalase, glutathione peroxidase (GPx), glutathione reductase and thioredoxin systems, plus non-enzymatic antioxidants including glutathione (GSH), vitamins C … Read more

Free radical theory of ageing MCQs With Answer — This focused review introduces B. Pharm students to the free radical theory of ageing, explaining how reactive oxygen species (ROS) and oxidative stress drive cellular senescence via mitochondrial dysfunction, lipid peroxidation, protein oxidation and DNA damage. Key biochemical pathways, such as Fenton and Haber–Weiss reactions, enzymatic … Read more

Introduction Free radicals play a central role in brain metabolism and are key mediators of oxidative stress that contribute to kidney and muscle damage. Reactive oxygen species (ROS) and reactive nitrogen species (RNS) arise from mitochondria, NADPH oxidase, xanthine oxidase and drug metabolism, causing lipid peroxidation, protein oxidation, DNA damage and mitochondrial dysfunction. Antioxidant defenses—glutathione, … Read more

Free radicals and reactive oxygen species (ROS) play central roles in the pathogenesis of cancer and atherosclerosis. Oxidative stress from excess ROS/RNS causes DNA damage, lipid peroxidation, protein oxidation, endothelial dysfunction, and chronic inflammation, driving carcinogenesis and plaque formation. Key concepts for B. Pharm students include sources of ROS (mitochondria, NADPH oxidase, xanthine oxidase), biomarkers … Read more

Role of free radicals in Ischemic reperfusion injury MCQs With Answer — Introduction Ischemia-reperfusion injury (I/R) occurs when blood flow returns to ischemic tissue, triggering an intense surge of free radicals and reactive oxygen species (ROS). Key sources include mitochondria, xanthine oxidase, NADPH oxidase and activated neutrophils that generate superoxide, hydrogen peroxide and hydroxyl radicals. … Read more

Free radicals and oxidative stress are central drivers of inflammation and its progression to chronic disease. For B. Pharm students, understanding reactive oxygen species (ROS), reactive nitrogen species (RNS), sources, and antioxidant defenses is essential for pharmacology and drug development. Free radical–mediated lipid peroxidation, protein and DNA damage activate signaling pathways such as NF-κB and … Read more

Role of free radicals in Diabetes mellitus MCQs With Answer Free radicals and oxidative stress play a central role in the pathogenesis and complications of diabetes mellitus. Excess glucose metabolism generates reactive oxygen species (ROS) and reactive nitrogen species (RNS) via mitochondrial dysfunction, NADPH oxidase activation, and glycation pathways, causing β-cell dysfunction, insulin resistance, lipid … Read more

Complex carbohydrates as functional food ingredients are essential for B.Pharm students studying the intersection of nutrition, pharmaceutics, and formulation science. This topic covers polysaccharides, resistant starches, non‑starch polysaccharides and modified carbohydrates that contribute dietary fiber, prebiotic effects, viscosity modulation, gelation and controlled‑release functionalities. Key keywords include complex carbohydrates, polysaccharides, dietary fiber, prebiotics, excipients, nutraceuticals, glycemic … Read more

Dietary fibres as functional food ingredients MCQs With Answer Dietary fibres are non-digestible carbohydrates and lignin that impart health benefits beyond basic nutrition. For B.Pharm students, understanding physicochemical properties (solubility, viscosity, fermentability), major types (cellulose, pectin, beta-glucan, inulin, resistant starch, psyllium), mechanisms (bile acid binding, glycemic modulation, SCFA production), analytical methods (AOAC enzymatic–gravimetric assays), formulation … Read more

Free radicals—reactive oxygen species (ROS) and reactive nitrogen species (RNS)—are produced endogenously (mitochondria, enzymatic systems) and exogenously (radiation, xenobiotics). Their chain reactions cause lipid peroxidation, protein oxidation, carbohydrate modification and nucleic acid damage, driving oxidative stress and disease. Key damaging products include malondialdehyde, 4-hydroxynonenal, protein carbonyls and 8-oxo‑2′‑deoxyguanosine; transition metals and Fenton chemistry amplify harm. … Read more