The cell is the basic structural, Functional, and Biological unit of life. They are also called “Building blocks of the 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 micrometres. 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”.
All cells either may be prokaryotic or eukaryotic. They have the envelope which covers the cell and regulates the movement of anything across the selectively permeable membrane. And it also helps to maintain the electric potential of the cell. In the cell membrane cytoplasm covers most of the cell volume. All cells have DNA, genes(heredity material), and RNA. This information is necessary to build various proteins such as enzymes and primary machinery.
Cells greatly differ in size, shape and activities. For example, Mycoplasmas are the smallest cells having a length of 0.3 micrometre and bacteria could be three to five micrometre. The largest isolated cell is the egg of an ostrich. Among all the multicellular organisms, human red blood cells are about seven micrometres in diameter. A nerve cell is the longest cell. Cells also vary in shape like round, elongated or spherical.
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 plant, animal, 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 synthesised 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.