INTRODUCTION TO MICROSCOPY CELL BIOLOGY
ENDOPLASMIC RETICULUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Next to the lysosomes.
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Adjacent to the Mitochondrion
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Adjacent to the Nucleus
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Next to the Food Vacuole
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Detailed explanation-1: -Rough ER lies immediately adjacent to the cell nucleus, and its membrane is continuous with the outer membrane of the nuclear envelope. The ribosomes on rough ER specialize in the synthesis of proteins that possess a signal sequence that directs them specifically to the ER for processing.
Detailed explanation-2: -RER is found mainly toward the nucleus of cell and SER towards the cell membrane or plasma membrane of cell. The outer (cytosolic) face of the RER is studded with ribosomes that are the sites of protein synthesis. The RER is especially prominent in cells such as hepatocytes.
Detailed explanation-3: -The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.