The cell is the basic structural, Functional, and Biological unit of life. They are also called “Building blocks of life”. Study of cells is called Cell biology, Cellular biology, or cytoplasm. Most plants and animal cells are only visible under a light microscope, with dimensions between one and 100 micrometers. When cell theory first developed, it stated that “All living organisms are composed of one or more cells and those cells are fundamental in all the organisms”.
Cell - The Unit of Life is one of the very important topics that the candidates who are NEET aspirants can prepare for. The topic actually starts during elementary school. But it is still one such topic that makes the cut for the various competitive exams like that of NEET. A candidate must be well versed with the types of cells as well as various other details that are included in a topic like this. This will help them a lot, even if there are any trick questions in their NEET Exam Paper.
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All the cells are divided into two. They are either prokaryotic or eukaryotic. There is an envelope that covers all the cells. This helps in the regulation of the movement that may happen across and around the selectively permeable membrane. This also helps with maintaining the cell’s electric potential.
In the cell membrane, a major part of the cell volume is covered by the cytoplasm. It is a known fact that all the cells have DNA, RNA, and genes(heredity material). This information is necessary in terms of building various proteins which are needed in the human body. These may include ones like enzymes.
If you did not know this before, then you would be surprised to know that cells might differ in their sizes, shapes, along with their activities. For example, Mycoplasmas are the smallest cells having a length of 0.3 micrometer and bacteria could be three to five micrometer.
Facts about Cells
Did you know that the largest isolated cell in the world is an ostrich’s egg? It is also a known fact that out of all the multicellular organisms, the diameter of the human red blood cells is approximately seven micrometers. The nerve cells are known for being the longest cells.
Cells can also vary in terms of their shape. They might be round, or elongated, or at times, spherical in shape.
Cells are Mainly divided into Two Types:
Prokaryotic cells: Prokaryotic cells are seen in bacteria and archaea. They were the first form of life seen on earth. Prokaryotic cells are simple and small compared to eukaryotic cells. Prokaryotic cells have three regions: Cell envelope (which encloses the cell from outside), Cytoplasmic region (inside the cell which contains genome), Flagella and pili (outside the cell's surface).
Eukaryotic cells: Eukaryotic cells are seen in higher organisms like plants, animals, fungi, slime, protozoa, and algae. Eukaryotic cells are much greater in size and volume compared to the prokaryotic cells. Most important cell organelles in a eukaryotic cell is a cell nucleus which houses the cell's DNA. After going through some basic concepts of cell unit of life NEET Questions, we can answer some of these questions given below.
Cell Unit of Life NEET Questions
Some of the Important NEET Questions on the Cell - The Unit of Life are:
1. Difference between Eukaryotic and prokaryotic cells in having
None of these
Answer. Option B
2. A major site for synthesis of lipids is
Answer- Option B
3. Ribosomal RNA is actively synthesized in
4. How many types of cells are known
5. The longest cell of plants is found in
Answer. Boehmeria nivea
6. Which of the following is the exception of cell theory?
7. Which is the smallest living cell with cell walls?
8. Which branch deals with the study of cell structure and function?
9. Which of the following is Prokaryote
10. The cell was discovered by
Answer. Robert Hooke
After going through the above NEET Questions on cell - The Unit of Life, it will be easy to answer other questions related to the cell. NEET question Cell - The Unit of Life is one of the important topics in Biology. These MCQ questions will help the NEET and other competitive exam aspirants to guess the type of questions can be asked on this topic.