Multiple Choice
In the light-dependent reactions of photosynthesis, which of the following is an essential input, commonly labeled as 'X'?
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9. Photosynthesis
Introduction to Photosynthesis
Multiple Choice
Which of the following diagrams correctly labels the reactants and products of photosynthesis?
A
Reactants: \(C_6H_{12}O_6 + 6\ \mathrm{CO}_2\); Products: \(6\ \mathrm{O}_2 + 6\ \mathrm{H}_2\mathrm{O}\)
B
Reactants: \(6\ \mathrm{O}_2 + 6\ \mathrm{H}_2\mathrm{O}\); Products: \(C_6H_{12}O_6 + 6\ \mathrm{CO}_2\)
C
Reactants: \(C_6H_{12}O_6 + 6\ \mathrm{O}_2\); Products: \(6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O}\)
D
Reactants: \(6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O}\); Products: \(C_6H_{12}O_6 + 6\ \mathrm{O}_2\)
Verified step by step guidance1
Step 1: Recall the chemical equation for photosynthesis, which is the process by which plants convert light energy into chemical energy. The general formula is: \(6\text{CO}_2 + 6\text{H}_2\text{O} + \text{light energy} \rightarrow C_6H_{12}O_6 + 6\text{O}_2\). This indicates that carbon dioxide (\(\text{CO}_2\)) and water (\(\text{H}_2\text{O}\)) are the reactants, while glucose (\(C_6H_{12}O_6\)) and oxygen (\(\text{O}_2\)) are the products.
Step 2: Analyze the options provided in the problem. Each option lists reactants and products, but only one matches the correct chemical equation for photosynthesis. The correct reactants should be \(6\text{CO}_2\) and \(6\text{H}_2\text{O}\), and the correct products should be \(C_6H_{12}O_6\) and \(6\text{O}_2\).
Step 3: Compare the given options to the correct chemical equation. Eliminate any options where the reactants or products are incorrectly labeled. For example, options that list glucose (\(C_6H_{12}O_6\)) as a reactant or carbon dioxide (\(\text{CO}_2\)) as a product are incorrect.
Step 4: Identify the option that correctly labels the reactants as \(6\text{CO}_2\) and \(6\text{H}_2\text{O}\), and the products as \(C_6H_{12}O_6\) and \(6\text{O}_2\). This matches the chemical equation for photosynthesis.
Step 5: Confirm your choice by ensuring it aligns with the biological process of photosynthesis, where plants use carbon dioxide and water, along with light energy, to produce glucose and oxygen.
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