Question

\(\underline{\hspace{1cm}}\) is the major site for ATP synthesis amid oxidative metabolism and so called power house of cells.

• A. Chloroplast
• B. Nucleus
• C. Ribosome
• D. Mitochondrion

Hint:

Mitochondria produce ATP through oxidative phosphorylation. In plants, chloroplasts make glucose (photosynthesis), but mitochondria are still the powerhouse for ATP in all eukaryotes.

Answer 1

The Correct Option is D

Step 1: ATP Synthesis Fundamentals.
Adenosine triphosphate (ATP) functions as the cell's energy carrier. Its primary synthesis occurs during cellular respiration within the mitochondria via oxidative phosphorylation.

Step 2: Option Assessment.
- Chloroplast: Primarily engaged in photosynthesis in plants; not the main location for oxidative ATP synthesis.
- Nucleus: Houses genetic material and controls cellular functions; not involved in ATP synthesis.
- Ribosome: Facilitates protein synthesis; not involved in energy generation.
- Mitochondrion: Site of the electron transport chain and oxidative phosphorylation, producing ATP. Referred to as the cell's powerhouse.

Step 3: Determination.
The correct identification is Mitochondrion.

Final Answer: \[\boxed{\text{Mitochondrion is the powerhouse of the cell.}}\]