Question 17
The model shows the light-dependent reactions and the Calvin Cycle within a cell.
image bace73ffe99f45138274b455013cc3cd
Which question can be answered about the light-dependent reactions?
a
Where is CO2 used?
b
Where is water broken down?
c
Where is oxygen used?
d
Where is glucose formed?
c
Where is oxygen used?
The question that can be answered about the light-dependent reactions is:
b. Where is water broken down?
To answer this question, we can analyze the image provided and look for clues that indicate the location or process related to each option. Let's break down each choice and see which one aligns with the light-dependent reactions:
a) "Where is CO2 used?"
The image does not explicitly show the utilization of CO2 in the light-dependent reactions. CO2 is typically used in the Calvin Cycle, which is part of the light-independent reactions. Therefore, this option is not related to the light-dependent reactions.
b) "Where is water broken down?"
The image shows water molecules being broken down into oxygen and hydrogen ions during the light-dependent reactions. This process occurs in the thylakoid membranes of the chloroplasts. Therefore, this option is correct and related to the light-dependent reactions.
c) "Where is oxygen used?"
The image does not indicate any utilization of oxygen during the light-dependent reactions. However, oxygen is produced as a byproduct of water splitting in the thylakoid membranes. Therefore, this option is related to the light-dependent reactions but does not directly refer to where oxygen is used.
d) "Where is glucose formed?"
The image does not show glucose being formed during the light-dependent reactions. Glucose is synthesized through the Calvin Cycle, which is part of the light-independent reactions. Therefore, this option is not related to the light-dependent reactions.
Based on the analysis, option b, "Where is water broken down?" is the question that can be answered about the light-dependent reactions.