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PCAT Review Questions - Pharmacy College

Category - Biology

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Which of the following statements about photosynthesis is false?
  1. Photosynthesis produces oxygen as a waste product.
  2. The dark reaction does not require sunlight.
  3. Photosynthesis takes place in the chloroplast.
  4. Sunlight needed for photosynthesis is stored in pigments such as chlorophyll.
  5. Photosynthesis results in the production of carbon dioxide.
Explanation
Answer: E, The statement about photosynthesis that is false is that photosynthesis results in the production of carbon dioxide. Photosynthesis actually extracts carbon dioxide from the atmosphere as part of the carbohydrate producing process.

Key Takeaway: The entire process of photosynthesis takes place in the chloroplast. It consists of two stages, the light reaction (light-dependent) and the dark reaction (light-independent). In the process, carbon dioxide and water are converted into a six carbon sugar and oxygen using sunlight as energy. The light that is needed to fuel photosynthesis is trapped in the chloroplast by pigments such as chlorophyll.
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