Which of the following statements is correct about mitochondria?

The correct answer is Option (4)- Mitochondria without outer membrane is called mitoplast

Explanation:

• Mitochondria are membrane-bound organelles found in the cells of most living organisms, including eukaryotes.
• They are commonly referred to as the "powerhouses of the cell" because they play a crucial role in cellular respiration, producing energy in the form of ATP.
• Mitochondria have a double membrane structure—an outer membrane and an inner membrane.

• A mitoplast is a mitochondrion that has been stripped of its outer membrane leaving the inner membrane and matrix intact. Biochemical fractionation using detergents such as digitonin are used in this process.

The other statements are incorrect:

• Mitochondria are not present in bacteria; they are present in eukaryotic cells.
• Mitochondria are bound by membranes, both outer and inner.