Question:
C\(_3\) plants utilize 18 molecules of ATP to synthesize one molecule of glucose from CO\(_2\). How many molecules of ATP equivalents are used by C\(_4\) plants to synthesize one molecule of glucose from CO\(_2\)?
C\(_3\) plants utilize 18 molecules of ATP to synthesize one molecule of glucose from CO\(_2\). How many molecules of ATP equivalents are used by C\(_4\) plants to synthesize one molecule of glucose from CO\(_2\)?
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C\(_4\) plants utilize more ATP due to their additional carbon fixation mechanism, which requires more energy compared to C\(_3\) plants.
Updated On: Dec 11, 2025
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Correct Answer: 30
Solution and Explanation
Step 1: Understanding the ATP requirements in C\(_3\) and C\(_4\) plants.
C\(_3\) plants require 18 molecules of ATP to synthesize one molecule of glucose. C\(_4\) plants, due to their additional mechanism for carbon fixation (C\(_4\) cycle), require more ATP for the same process. Typically, C\(_4\) plants require 30 ATP equivalents to synthesize one glucose molecule.
Step 2: Conclusion.
The correct answer is (C) 30, as C\(_4\) plants require 30 ATP equivalents to synthesize one glucose molecule.
C\(_3\) plants require 18 molecules of ATP to synthesize one molecule of glucose. C\(_4\) plants, due to their additional mechanism for carbon fixation (C\(_4\) cycle), require more ATP for the same process. Typically, C\(_4\) plants require 30 ATP equivalents to synthesize one glucose molecule.
Step 2: Conclusion.
The correct answer is (C) 30, as C\(_4\) plants require 30 ATP equivalents to synthesize one glucose molecule.
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