INTRODUCTION
CELL STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cell Membrane
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Ribosomes
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DNA
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ER
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Detailed explanation-1: -Answer and Explanation: The nuclear membrane is not a component of all cells.
Detailed explanation-2: -The endoplasmic reticulum is not found in red blood cells, or spermatozoa.
Detailed explanation-3: -All eucaryotic cells have an endoplasmic reticulum (ER). Its membrane typically constitutes more than half of the total membrane of an average animal cell (see Table 12-2). The ER is organized into a netlike labyrinth of branching tubules and flattened sacs extending throughout the cytosol (Figure 12-35).
Detailed explanation-4: -Cell wall is only found in plant cells and not in any other cells.
Detailed explanation-5: -The endoplasmic reticulum (ER) is a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells. All eukaryotic cells contain an ER.