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  4. Which one of the following structures is an organelle within an organelle?

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Q. Which one of the following structures is an organelle within an organelle?

AIPMTAIPMT 2012Cell : The Unit of Life

Solution:

In eukaryotic cells, 80 S ribosomes (organelles) are attached to the rough endoplasmic reticulum(RER) which is an organelle. It is also present in the organelles: chloroplast (in plant cells) and mitochondria. Thus ribosomes are called organelles within the organelle. Hence Ribosome is an organelle within an organelle. So, the correct answer is 'Ribosome'