Question

Which of the following is not a cell organelle?
A. Mitochondria
B. Ribosome
C. Golgi complex
D. Microsome

Answer 1

Hint: In order for you to answer the question, look at the options above.Which of the name seems odd when the name of the cell organelle comes in mind. You must also know each of the characteristics that a cell organelle has and how different it is from other cellular structures.

Complete answer:
A cell is the structural and the functional unit of life. It is adorned with many cell organelles that carry out specific functions inside the cells. The most striking feature of cell organelle is that it is a membrane bound structure made of phospholipids and they form a highly enclosed boundary inside the cell to perform various functions. The cell organelle found in mainly animal cells are the nucleus, smooth endoplasmic reticulum, rough endoplasmic reticulum, golgi complex , lysosome, mitochondria, ribosome among many others. Let us look at each of the functions of the cellular structure mentioned above.
1. Mitochondria- It is famously known as the powerhouse of the cell. It is mainly associated with the production of ATP that is the energy currency by the use of the enzyme ATP synthase. Distinct fingerlike projection of the inner mitochondrial membrane is called the cristae where the synthesis of ATP occurs.
2. Ribosome-Ribosomes are minute granules like cell organelles that are found in both the prokaryotic and eukaryotic cells. They perform the function of protein synthesis. They are of the type 70s and 80s respectively.
3. Golgi complex-It is also known as the golgi complex. It is a membrane bound cell organelle that helps in the packaging of proteins into vesicles right before they are secreted. Thus they play an important role in the secretory pathway.
4. Microsome-They are small vesicle-like structures that are formed from the endoplasmic reticulum when the eukaryotic cells are broken down in the laboratory. They are not present in the healthy cells

So, the correct answer is option D. Microsome.

Note:
In a cell, chloroplast and mitochondria have their own DNA. They divide by their own means. They have evolved by the process of endosymbiosis when the cells have evolved and taken up cyanobacteria and proteobacteria which have then modified over the years to give rise to the chloroplast and the mitochondria.