Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter5: Photosynthesis
Section: Chapter Questions
Problem 12CTQ: What is the overall purpose of the light reactions in photosynthesis?
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Question
Why do photosynthesis occur in only chloroplasts?
Expert Solution
Step 1
- Photosynthesis is a process used by plants and some prokaryotes to convert light energy into chemical energy.
- Photosynthesis is the ultimate process that is responsible for synthesizing food for all the living organisms present on earth. All the living organisms are dependent on photosynthetic plants for their energy directly or indirectly.
- The photosynthetic reaction is a redox process involving the splitting of water using the energy of light (oxidation reaction) that produces a proton (H+), oxygen gas (O2), and electrons. This results in the release of free oxygen that is crucial for sustaining life on earth.
- The electron is transferred to carbon dioxide (CO2) that is reduced into organic products.
- Other electrons and protons are utilized in reducing nitrates and sulfates that serves as the precursor of amino acids that form proteins.
- The carbohydrates and sugars are the major organic products of photosynthesis.
- The overall photosynthetic reaction is:
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