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Mitochondria, Plastids & Vacuoles - Cell Biology - Class 9 - Science Video Lecture

FAQs on Mitochondria, Plastids & Vacuoles - Cell Biology - Class 9 - Science Video Lecture

1. What is the function of mitochondria in a cell?

Ans. Mitochondria are known as the powerhouses of the cell. Their main function is to generate energy in the form of ATP through cellular respiration. ATP is the energy currency of the cell and is required for various cellular processes.

2. What are plastids and what are their functions?

Ans. Plastids are a group of organelles found in plant cells. They are responsible for various functions such as photosynthesis, storage of starch, pigmentation, and synthesis of lipids. Chloroplasts, a type of plastid, are responsible for photosynthesis.

3. What is the role of vacuoles in a cell?

Ans. Vacuoles are membrane-bound organelles found in plant and animal cells. They have various functions such as storing water, maintaining cell turgor pressure, storing nutrients, and degrading waste products. In plant cells, vacuoles are particularly large and play a crucial role in maintaining cell shape and providing structural support.

4. How do mitochondria produce energy?

Ans. Mitochondria produce energy through a process called cellular respiration. They contain enzymes and proteins that are involved in the breakdown of glucose and other organic molecules. This process releases energy in the form of ATP, which is then used by the cell for various metabolic activities.

5. What are the different types of plastids?

Ans. Plastids can be classified into three main types: chloroplasts, chromoplasts, and leucoplasts. Chloroplasts are responsible for photosynthesis and contain chlorophyll. Chromoplasts are involved in pigment synthesis and provide color to fruits and flowers. Leucoplasts are non-pigmented plastids and are involved in the synthesis and storage of starch, lipids, and proteins.

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