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Questions and Answers
What are the raw materials required for the process of photosynthesis?
What are the raw materials required for the process of photosynthesis?
Photosynthesis is considered a catabolic process.
Photosynthesis is considered a catabolic process.
False
What is the primary product of photosynthesis?
What is the primary product of photosynthesis?
carbohydrate
Plants synthesize proteins from the photosynthetic products with the addition of ________ from minerals.
Plants synthesize proteins from the photosynthetic products with the addition of ________ from minerals.
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Match the following components of photosynthesis with their roles:
Match the following components of photosynthesis with their roles:
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Which statement correctly describes the relationship between the rate of photosynthesis (P) and the rate of respiration (R) during net food production?
Which statement correctly describes the relationship between the rate of photosynthesis (P) and the rate of respiration (R) during net food production?
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The compensation point represents a scenario where there is net oxygen production.
The compensation point represents a scenario where there is net oxygen production.
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What is the highest rate of photosynthesis of the plant in mg h⁻¹?
What is the highest rate of photosynthesis of the plant in mg h⁻¹?
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Plants carry out respiration _____.
Plants carry out respiration _____.
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Match the conditions (A to E) with the corresponding net gas exchange states:
Match the conditions (A to E) with the corresponding net gas exchange states:
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Which of the following elements is primarily responsible for synthesizing amino acids, proteins, and nucleic acids?
Which of the following elements is primarily responsible for synthesizing amino acids, proteins, and nucleic acids?
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The spongy mesophyll cells are tightly packed and have more chloroplasts than palisade mesophyll cells.
The spongy mesophyll cells are tightly packed and have more chloroplasts than palisade mesophyll cells.
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What are guard cells responsible for in plant leaves?
What are guard cells responsible for in plant leaves?
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The primary deficiency symptom of nitrogen in plants is _____.
The primary deficiency symptom of nitrogen in plants is _____.
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Match the nutrient with its deficiency symptom:
Match the nutrient with its deficiency symptom:
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Which mesophyll layer contains more chloroplasts and is located at the upper part of the leaf?
Which mesophyll layer contains more chloroplasts and is located at the upper part of the leaf?
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What is the major form of phosphorus found in soil?
What is the major form of phosphorus found in soil?
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Plant guard cells are responsible for synthesizing chlorophyll.
Plant guard cells are responsible for synthesizing chlorophyll.
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Which two gases are primarily involved in gas exchange for terrestrial plants?
Which two gases are primarily involved in gas exchange for terrestrial plants?
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Gases from the environment diffuse into the air space through the stoma.
Gases from the environment diffuse into the air space through the stoma.
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What happens to gases in Stage 2 of gas exchange in mesophyll cells?
What happens to gases in Stage 2 of gas exchange in mesophyll cells?
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Roots are not covered by ___ in order to allow gas exchange.
Roots are not covered by ___ in order to allow gas exchange.
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Match the type of plant to its gas exchange characteristics:
Match the type of plant to its gas exchange characteristics:
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What implication does a positive net uptake of carbon dioxide have for a plant?
What implication does a positive net uptake of carbon dioxide have for a plant?
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During the night, photosynthesis occurs while respiration stops.
During the night, photosynthesis occurs while respiration stops.
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Explain the effect of light intensity on the rate of photosynthesis.
Explain the effect of light intensity on the rate of photosynthesis.
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Study Notes
Photosynthesis in Plants
- Plants are autotrophs, meaning they produce their own food through photosynthesis.
- Photosynthesis is an anabolic process, building complex organic molecules (carbohydrates) from simpler inorganic molecules (carbon dioxide and water) using light energy.
- The overall word equation for photosynthesis is: carbon dioxide + water → carbohydrate + oxygen.
- Raw materials for photosynthesis: carbon dioxide and water.
- Products of photosynthesis: carbohydrates and oxygen.
- Chlorophyll is a pigment that absorbs light energy used in the process.
Importance of Minerals in Plants
- Plants require minerals for healthy growth.
- Minerals are absorbed as ions from the soil.
- Nitrogen (N): Needed for amino acids, proteins, nucleic acids, and chlorophyll synthesis.
- Phosphorus (P): Crucial for cell membranes, ATP (energy molecule), and nucleic acids.
- Magnesium (Mg): Essential for chlorophyll synthesis.
Gas Exchange in Plants
- Plants exchange gases (oxygen, carbon dioxide) with the atmosphere through stomata.
- Stomata are pores found on leaves, primarily on the lower epidermis to prevent water loss, controlling gas exchange
- Guard cells regulate opening and closing of stomata, influencing the rate of gas exchange.
- Palisade mesophyll cells are cylindrical and densely packed, while spongy mesophyll cells are irregularly shaped and loosely packed
- Spongy mesophyll cells have more air space, allowing gases to diffuse easily.
- Submerged plants lack cuticle and have stomata in the upper epidermis.
Effect of Light Intensity on Gas Exchange
- Photosynthesis rate increases with increasing light intensity up to a maximum.
- Respiration takes place all the time at a fairly constant rate.
- Net uptake or release of gases depends on the balance between photosynthesis and respiration rates.
- During the day, net uptake of CO2 and release of O2 typically occurs.
- At night, net uptake of O2 and release of CO2 typically occurs.
- The compensation point is when the rate of photosynthesis equals the rate of respiration resulting in no net exchange of gases.
Gas exchange in stems and roots
- Herbaceous plants have stomata for gas exchange in stems, while woody plants have lenticels.
- Roots are not covered by cuticle; gas exchange occurs throughout the surface.
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Description
Explore the critical processes of photosynthesis and the importance of minerals in plant growth. This quiz covers the conversion of light energy into carbohydrates, the role of chlorophyll, and essential minerals for healthy plant development. Test your knowledge on how plants thrive through these vital functions.
