Answer the following:
1.) why mitochondria and chloroplast are called semi-autonomous organelle?
2.)write the structure and functions of plastids?
3.) define vacoule and write it's functions?
4.) why are lysosomes known as 'suicide bag'?
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Answers
1)Mitochondria and Chloroplast are called semiautonomous cell organelle. Because, they have their own DNA and Ribosomes. Hence, they can synthesize some of their proteins. For other proteins they depend on nucleus.
2)Plastid is a double membrane-bound organelle involved in the synthesis and storage of food, commonly found within the cells of photosynthetic plants. A plastid containing green pigment (chlorophyll) is called chloroplast whereas a plastid containing pigments apart from green is called a chromoplast.
3)Vacuoles are storage bubbles found in cells. They are found in both animal and plant cells but are much larger in plant cells. Vacuoles might store food or any variety of nutrients a cell might need to survive. They can even store waste products so the rest of the cell is protected from contamination. Eventually, those waste products would be sent out of the cell.
4)Lysosomes are the cellular organelles that contain digestive enzymes that break down waste materials, foreign materials and foreign particles that entered cell. It helps the cell to process its nutrients and is responsible for destroying the cell after it has died. It is bounded by only one single membrane. It break-down the structures within the cells. However in certain circumstances may be in case of diseases or some conditions lysosomes begin to break-down living cells. This article deals with why lysosomes are known as suicidal bags of the cell, Importance of lysosomes, its structure and formation.