INTRODUCTION TO MICROSCOPY CELL BIOLOGY
DIFFERENTIATED CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Myosin is plentiful in muscle cells, but is not found at all in lens cells. Lens cells contain large amounts of crystallins, which are not found in muscle cells. Why do some proteins appear in one type of cell but not in another?
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During differentiation, certain genes are added to cells to produce proteins that enable specific functions.
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During differentiation, certain genes are activated to produce proteins that enable specific functions.
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Differentiated cells produce all proteins but destroy the proteins they do not use.
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Differentiated cells release unused proteins into the blood for other cells to use.
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Explanation:
Detailed explanation-1: -Abstract. All the cells of higher organisms have the same DNA but not the same proteins. Each type of specialised cell that forms a tissue has its own pattern of gene expression and, consequently, it contains a particular set of proteins that determine its function.
Detailed explanation-2: -Muscle cells and nerve cells have a large number of mitochondria.
Detailed explanation-3: -Muscle cells have mitochondria; most other cells do not.
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