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1. What are plastids?
Ans. Plastids are a type of organelles found in plant cells. They are responsible for various important functions such as photosynthesis, storage of food, and pigment synthesis. Plastids can be categorized into several types, including chloroplasts, chromoplasts, and leucoplasts.
2. What is the main function of chloroplasts?
Ans. Chloroplasts are a type of plastids that play a crucial role in the process of photosynthesis. They contain chlorophyll, a pigment that captures sunlight and converts it into chemical energy through photosynthesis. This energy is then used to produce glucose and oxygen, essential for plant growth.
3. How are chromoplasts different from chloroplasts?
Ans. Chromoplasts and chloroplasts are both types of plastids, but they differ in their main function. While chloroplasts are responsible for photosynthesis and contain chlorophyll, chromoplasts are involved in the synthesis and storage of pigments, giving fruits and flowers their vibrant colors.
4. What is the significance of leucoplasts in plant cells?
Ans. Leucoplasts are another type of plastids that are primarily involved in the storage of starch, oils, and proteins in plant cells. They are commonly found in roots, tubers, and seeds, where they store nutrients to be utilized during germination or for growth in periods of nutrient scarcity.
5. Can plastids be found in animal cells?
Ans. Plastids are typically found in plant cells and are absent in animal cells. However, some specialized organisms such as certain sea slugs have the ability to incorporate plastids from the algae they consume. These plastids, known as kleptoplastids, can provide energy through photosynthesis for a limited period.
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