The relationship between photosynthesis and cellular respiration can best be described as O Photosynthesis occurs only in plants; cellular respiration occurs only in animals. O Photosynthesis stores energy in complex organic molecules; cellular respiration releases energy from complex organic molecules. O Cellular respiration runs the biochemical pathways of photosynthesis in reverse. O Photosynthesis is catabolic; cellular respiration is anabolic.

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### Biology 101: Photosynthesis and Cellular Respiration

**Question 19: Understanding the Relationship Between Photosynthesis and Cellular Respiration**

The relationship between photosynthesis and cellular respiration can best be described as:

- **A. Photosynthesis occurs only in plants; cellular respiration occurs only in animals.**
- **B. Photosynthesis stores energy in complex organic molecules; cellular respiration releases energy from complex organic molecules.**
- **C. Cellular respiration runs the biochemical pathways of photosynthesis in reverse.**
- **D. Photosynthesis is catabolic; cellular respiration is anabolic.**

### Explanation
**Option A:** This is incorrect because photosynthesis primarily occurs in plants, algae, and some bacteria, while cellular respiration occurs in both plants and animals.

**Option B:** This is the correct answer. Photosynthesis is the process by which plants and certain other organisms use sunlight to synthesize foods with the help of chlorophyll in the chloroplasts, capturing energy in complex organic molecules (glucose). Cellular respiration, on the other hand, is the process of breaking down these complex organic molecules to release energy (in the form of ATP) that the cells can use.

**Option C:** This statement is misleading. While it's true that the overall equations for photosynthesis and cellular respiration are reverse processes, cellular respiration does not literally run the pathways of photosynthesis in reverse.

**Option D:** This option is incorrect because it incorrectly categorizes the processes; actually, photosynthesis is an anabolic process (building complex molecules from simpler ones with the input of energy), and cellular respiration is a catabolic process (breaking down complex molecules and releasing energy).

Understanding the synergy between these two essential biological processes is fundamental in comprehending how energy flows through living systems.
Transcribed Image Text:### Biology 101: Photosynthesis and Cellular Respiration **Question 19: Understanding the Relationship Between Photosynthesis and Cellular Respiration** The relationship between photosynthesis and cellular respiration can best be described as: - **A. Photosynthesis occurs only in plants; cellular respiration occurs only in animals.** - **B. Photosynthesis stores energy in complex organic molecules; cellular respiration releases energy from complex organic molecules.** - **C. Cellular respiration runs the biochemical pathways of photosynthesis in reverse.** - **D. Photosynthesis is catabolic; cellular respiration is anabolic.** ### Explanation **Option A:** This is incorrect because photosynthesis primarily occurs in plants, algae, and some bacteria, while cellular respiration occurs in both plants and animals. **Option B:** This is the correct answer. Photosynthesis is the process by which plants and certain other organisms use sunlight to synthesize foods with the help of chlorophyll in the chloroplasts, capturing energy in complex organic molecules (glucose). Cellular respiration, on the other hand, is the process of breaking down these complex organic molecules to release energy (in the form of ATP) that the cells can use. **Option C:** This statement is misleading. While it's true that the overall equations for photosynthesis and cellular respiration are reverse processes, cellular respiration does not literally run the pathways of photosynthesis in reverse. **Option D:** This option is incorrect because it incorrectly categorizes the processes; actually, photosynthesis is an anabolic process (building complex molecules from simpler ones with the input of energy), and cellular respiration is a catabolic process (breaking down complex molecules and releasing energy). Understanding the synergy between these two essential biological processes is fundamental in comprehending how energy flows through living systems.
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