Problem Analysis:
The task involves labeling a diagram that summarizes the two stages of photosynthesis. The diagram is divided into two main parts: the
light-dependent reactions and the
Calvin cycle (light-independent reactions). The word bank provides terms that need to be matched with the numbered labels in the diagram.
Step-by-Step Solution:
####
1. Understanding the Diagram:
- The left side of the diagram represents the
light-dependent reactions, which occur in the
thylakoid membranes.
- The right side of the diagram represents the
Calvin cycle, which occurs in the
stroma of the chloroplast.
- The arrows indicate the flow of energy and molecules between these two stages.
####
2. Labeling the Diagram:
#####
Left Side (Light-Dependent Reactions):
1.
1. This is the overall process occurring here, which is the
light reactions.
2.
2. The yellow lightning bolt indicates
light energy being absorbed.
3.
5. These are the structures where light absorption occurs; they are called
thylakoids.
4.
6. The stack of thylakoids is called a
granum.
5.
7. The molecule produced in the light reactions that donates electrons is
NADPH.
6.
8. Another molecule produced in the light reactions is
ATP.
7.
9. The splitting of water (
H₂O) releases oxygen (
O₂) and provides electrons for the electron transport chain.
8.
10. The byproduct of water splitting is
O₂, which is released as a gas.
9.
12. The space surrounding the thylakoids is the
stroma, where the Calvin cycle occurs.
#####
Right Side (Calvin Cycle):
1.
3. The Calvin cycle begins with the uptake of
CO₂ from the atmosphere.
2.
4. The Calvin cycle occurs in the
stroma of the chloroplast.
3.
11. The Calvin cycle is the process itself, so this label should be
Calvin cycle.
4.
13. The final product of the Calvin cycle is
sugar (glucose).
5.
14. The Calvin cycle consumes
ADP + P to regenerate ATP and NADP⁺ for the light reactions.
####
3. Filling in the Labels:
Using the word bank, the labels can be filled as follows:
1.
1. light reactions
2.
2. light
3.
3. CO₂
4.
4. stroma
5.
5. thylakoids
6.
6. granum
7.
7. NADPH
8.
8. ATP
9.
9. H₂O
10.
10. O₂
11.
11. Calvin cycle
12.
12. stroma
13.
13. sugar
14.
14. ADP + P
Final Answer:
\[
\boxed{
\begin{array}{ll}
1. & \text{light reactions} \\
2. & \text{light} \\
3. & \text{CO₂} \\
4. & \text{stroma} \\
5. & \text{thylakoids} \\
6. & \text{granum} \\
7. & \text{NADPH} \\
8. & \text{ATP} \\
9. & \text{H₂O} \\
10. & \text{O₂} \\
11. & \text{Calvin cycle} \\
12. & \text{stroma} \\
13. & \text{sugar} \\
14. & \text{ADP + P} \\
\end{array}
}
\]
Explanation:
- The
light reactions use light energy to produce ATP and NADPH, while splitting water to release oxygen.
- The
Calvin cycle uses the ATP and NADPH generated in the light reactions to fix carbon dioxide into glucose.
- The two stages are interconnected, with the Calvin cycle consuming ADP and P to regenerate ATP and NADP⁺ for the light reactions.
Parent Tip: Review the logic above to help your child master the concept of photosynthesis worksheet answers.
