The deficiency of vitamin C causes: MCQ with Answer and Explanation

Explanation:
Glucagon, released by pancreatic alpha cells when blood glucose is low, activates glycogen phosphorylase, leading to glycogenolysis and release of glucose from the liver. Insulin promotes glycogenesis. Cortisol and thyroxine have permissive effects.

Explanation:
Peroxisomes are single-membrane organelles containing oxidative enzymes like catalase and urate oxidase. They break down fatty acids via β-oxidation and detoxify hydrogen peroxide. Lysosomes contain hydrolytic enzymes, mitochondria energy, Golgi packaging. Peroxisomes are abundant in liver and kidney cells.

Explanation:
Acid rain is caused by emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) reacting with atmospheric water to form acids. Biological Oxygen Demand (BOD) measures the amount of oxygen required by microbes to decompose organic matter, indicating water pollution levels. Eutrophication (nutrient enrichment) causes algal blooms, depleting oxygen and killing aquatic life, thereby decreasing biodiversity. Thus, statements 1 and 2 are correct.