Final answer:
The statement is true; mitochondria are crucial cell organelles that create ATP, the cell's main energy-carrying molecule, via cellular respiration.
Step-by-step explanation:
The statement that mitochondria make energy for a cell is true. Mitochondria, often referred to as the powerhouses or energy factories of a cell, are essential organelles responsible for producing adenosine triphosphate (ATP), which is the primary energy currency of the cell. Through the process of cellular respiration, mitochondria convert energy from nutrients like glucose into ATP. Mitochondria have a double membrane, with the inner membrane folded into cristae to increase surface area, where a series of enzymes and molecules engage in the biochemical reactions necessary for ATP production.
Cells with high energy demands, such as muscle cells and neurons, contain a large number of mitochondria to meet their needs. Conversely, cells with lower energy requirements may have fewer mitochondria. The production of ATP is vital for numerous cellular functions, including muscle contraction, nerve impulse propagation, and various biosynthetic reactions.
Additional organelles, like peroxisomes, also play a role in cell metabolism by detoxifying harmful substances. However, it is the mitochondria's unique role to harness energy from organic compounds and make it available in the form of ATP for a cell's various energy-consuming activities.