Which of the following is a characteristic feature of mitochondria in eukaryotic cells?

• A. They are responsible for protein synthesis.
• B. They are surrounded by a single membrane.
• C. They contain their own circular DNA.
• D. They store genetic information in the form of chromatin.

Answer: (C)

Verified step by step guidance

1. Understand the role of mitochondria in eukaryotic cells: Mitochondria are often referred to as the 'powerhouses' of the cell because they generate ATP (adenosine triphosphate) through cellular respiration, which is the primary energy currency of the cell.
2. Recall the structural features of mitochondria: Mitochondria are double-membrane organelles, meaning they are surrounded by two membranes—an outer membrane and an inner membrane. This is a key distinguishing feature.
3. Identify the genetic characteristic of mitochondria: Mitochondria contain their own circular DNA, which is separate from the nuclear DNA. This allows them to produce some of their own proteins and enzymes necessary for their function.
4. Eliminate incorrect options: Protein synthesis primarily occurs in ribosomes, not mitochondria. Chromatin, which stores genetic information, is found in the nucleus, not in mitochondria. Additionally, mitochondria are not surrounded by a single membrane but by two membranes.
5. Conclude that the correct answer is: 'They contain their own circular DNA,' as this is a unique and defining feature of mitochondria in eukaryotic cells.