During active transport across the cell membrane, a cell requires a continuous supply of ATP to move substances against the concentration gradient. The organelle responsible for producing this energy is:
Correct answer: B. Mitochondria.
- A. Nucleus.
- B. Mitochondria.
- C. Golgi apparatus.
- D. Endoplasmic reticulum.
Explanation
Mitochondria are the site of aerobic respiration and produce most of the cell's ATP, which powers carrier proteins pumping substances against their concentration gradient. The nucleus controls the cell, the Golgi apparatus packages products and the endoplasmic reticulum makes and transports proteins and lipids.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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