Unlike mitochondria, chloroplasts do not have a transporter that allows them to

Question

Unlike mitochondria, chloroplasts do not have a transporter that allows them to export ATP to the cytosol. How then does the rest of the cell get the ATP it needs to survive? al plants ovidire carbohydates (eucrose directy e opat b) plants use the glucose exported from chloroplasts (sucrose) and follow glycolysis in the cytoplasm, citric acid cycle (TCA) as well as oxidative phosphorylation (OP) in the mitochondrion to make all the ATP they need c) plants use the ATP generated in the chloroplast to drive all non-favorable reactions within the cell d) plants have chloroplasts instead of mitochondria.

Explanation / Answer

Ans. Correct option- B. Plants have both chloroplast and mitochondria.

The carbohydrates synthesized during photosynthesis by consuming ATP from photophosphorylation are exported out of the chloroplast into cytoplasm.

These carbohydrates (say, glucose) undergo glycolysis in cytoplasm to produce pyruvate. Pyruvate is ultimately catabolized in mitochondria via TCA and ETC for the production of ATP through oxidative phosphorylation. ATP is exported out of mitochondria into cytoplasm, which is used to compensate the energy demand of the cell.

# Option A. Incorrect. Carbohydrates are oxidized in cytoplasm and mitochondria but not in chloroplast because it lacks the necessary enzymes for these pathways.

# Option C. Incorrect. Incorrect. The ATP generated during oxidative phosphorylation is principally used in the biosynthesis of carbohydrates.

Most of energy for driving non-favourable reactions in the cell comes from oxidation of glucose/carbohydrates in cytoplasm and mitochondria.

# Option D. Incorrect. Plants have both chloroplast and mitochondria.

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