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Questions and Answers
What is the primary function of chloroplasts in plant cells?
What is the primary function of chloroplasts in plant cells?
- To regulate cell division
- To store nutrients and water
- To provide structural support to the cell
- To facilitate photosynthesis (correct)
Which of the following correctly represents the process of photosynthesis?
Which of the following correctly represents the process of photosynthesis?
- 6CO2 + 6O2 → C6H12O6 + 6H2O
- C6H12O6 + 6O2 → 6H2O + 6CO2
- C6H12O6 → 6H2O + 6CO2 + energy
- 6H2O + 6CO2 → C6H12O6 + 6O2 (correct)
What role does the cell wall play in plant cells?
What role does the cell wall play in plant cells?
- It provides shape and support (correct)
- It regulates the entry of substances
- It assists in photosynthesis
- It stores energy in the form of sugars
What do plants rely on as their source of energy?
What do plants rely on as their source of energy?
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Which of these substances is produced as a by-product of photosynthesis?
Which of these substances is produced as a by-product of photosynthesis?
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Study Notes
Plant Cell
- Differentiates from animal cells by possessing a rigid cell wall and chloroplasts.
- Contains essential organelles such as nucleus, mitochondria, and endoplasmic reticulum, similar to all eukaryotic cells.
Cell Wall
- Composed mainly of cellulose, providing structural integrity and shape to the cell.
- Acts as a protective barrier, preventing excess water absorption and protecting against pathogens.
Chloroplast
- Specialized organelles where photosynthesis takes place in plant cells.
- Contain chlorophyll, a green pigment crucial for capturing light energy during the photosynthesis process.
Photosynthesis
- A biochemical process converting light energy into chemical energy, primarily in green plants.
- Critical for energy production as plants cannot ingest food, relying on sunlight for energy.
- Chemical equation:
- 6H2O + 6CO2 → C6H12O6 + 6O2
- Reactants: six carbon dioxide (CO2) and six water (H2O) molecules.
- Through the energy captured by chlorophyll, the reactants are transformed into glucose (C6H12O6) and oxygen (O2).
- Produced glucose serves as an energy source, while oxygen is released as a by-product into the atmosphere.
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