RRB Group D 27 Nov 2025 Shift 3 Solved Paper

Concept:Mitochondria are the cell organelles with an extensive inner membrane surface area for $\mathrm{ATP}$ production.Explanation:Mitochondria are called the powerhouses of the cell because they generate most of the cell's $\mathrm{ATP}$.Their inner membrane is folded into cristae, which greatly increases the surface area.This large surface area allows more space for the electron transport chain and other enzymes involved in $\mathrm{ATP}$ synthesis.$\mathrm{ATP}$ is produced through oxidative phosphorylation on the inner mitochondrial membrane.Lysosomes are digestive organelles and do not produce $\mathrm{ATP}$.Vacuoles are storage organelles and also do not generate $\mathrm{ATP}$.The cell wall is a rigid structural layer and has no role in $\mathrm{ATP}$ production.Only mitochondria possess the necessary membrane surface area and enzymatic machinery for efficient $\mathrm{ATP}$ generation.Answer:Mitochondria