Multiple Choice
What would be the expected effect on plants if the atmospheric CO\(_2\) concentration was doubled?
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9. Photosynthesis
Introduction to Photosynthesis
Multiple Choice
Photosynthesis is the major source of which of the following gases in Earth's atmosphere?
A
Methane (\(CH_4\))
B
Nitrogen (\(N_2\))
C
Oxygen (\(O_2\))
D
Carbon dioxide (\(CO_2\))
Verified step by step guidance1
Understand the process of photosynthesis: Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose. During this process, oxygen (\(O_2\)) is released as a byproduct.
Recall the chemical equation for photosynthesis: The general equation is: . This shows that oxygen is produced during photosynthesis.
Identify the source of oxygen: The oxygen released during photosynthesis comes from the splitting of water molecules (\(H_2O\)) during the light-dependent reactions of photosynthesis.
Eliminate incorrect options: Methane (\(CH_4\)) and nitrogen (\(N_2\)) are not products of photosynthesis. Carbon dioxide (\(CO_2\)) is a reactant, not a product, in photosynthesis.
Conclude that oxygen (\(O_2\)) is the correct answer: Based on the process and the chemical equation, oxygen is the major gas released into Earth's atmosphere as a result of photosynthesis.
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