Cell - The Unit of Life
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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Subcellular Components
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
Cell wall
Nuclear membrane
Ribosome
None of these
Answer. Option B
2. A major site for synthesis of lipids is
RER
SER
Symplast
Nucleoplasm
Answer- Option B
3. Ribosomal RNA is actively synthesized in
Lysosomes
Nucleolus
Nucleoplasm
Ribosomes
Answer- Nucleolus
4. How many types of cells are known
One
Two
Three
Four
Answer. Three
5. The longest cell of plants is found in
Victoria amazonica
Eucalyptus
Boehmeria nivea
Sequoia
Answer. Boehmeria nivea
6. Which of the following is the exception of cell theory?
Bacteria
Fungi
Viruses
Lichen
Answer. Viruses
7. Which is the smallest living cell with cell walls?
Viroids
Bacteria
Algae
Mycoplasma
Answer. Bacteria
8. Which branch deals with the study of cell structure and function?
Histology
Ecology
Morphology
Cytology
Answer. Cytology
9. Which of the following is Prokaryote
Agaricus
Green algae
Salmonella
Bacteriophage
Answer. Salmonella
10. The cell was discovered by
Grew
Brown
Robert Hooke
Darwin
Answer. Robert Hooke
Conclusion
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.
FAQs on Cell The Unit of Life NEET Questions
1. The Cell is the Basic Unit of Life - Who Has Proposed it?
Theodor Schwann is the man behind the proposed cell theory back in 1839.
His theory consists basically of three main parts which are as follows:
The first part pertains to the fact that all the organisms have their basic composition or are made up of cells.
The second is where his theory stated that the cell is a fundamental unit of life.
The third theory is where it is concluded that the cells are the product of cells which have multiplied.
2. Why is a Cell Called a Basic Unit of Life?
There are two cell types:
Prokaryotic cells:
These are the ones which can be found in organisms like bacteria and archaea. They are considered to be the first form of life that ever existed on earth. They are also known as the simpler and smaller in form as compared to eukaryotic cells.
Eukaryotic cells:
These are the ones which are spotted in more of the higher organisms such as fungi, plant, animal, protozoa, slime, and algae. They are greater in terms of their size and volume as compared to the prokaryotic cells.
3. What are the Ten Levels of Organization in Living Things?
There are ten levels of organization of living things. All of these range from a small and single organelle to the biosphere which exists in a highly structured hierarchy. Living things can be found to be highly organized and structured. However, these are examined on a scale that goes from small to large as per the basis following the said hierarchy. The levels are actually the biological levels of organization, in which the living things are categorized in an arrangement that is done from simplest to the most complex.
This is how it goes: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
4. Why is the cell considered to be the fundamental unit of life?
It is believed that cells are the fundamental units of life because of their many capabilities. They have the capability to do all or any of the required biochemical processes which are needed for it to survive. Since all the living organisms are made up of cells, it is a must for their survival that their cells function well in order to obtain energy and let go of any metabolic waste.
It is basically the metabolic functions of the human body that the cells are supposed to perform which easily make them an important part of life.
5. How can I prepare for Cell - The Unit of Life NEET Questions?
It is always the best idea to go with study material for the NEET Exams that is provided by a trusted source. Your best bet would be Vedantu, which takes care of all such online materials which can be used to their best capabilities in order to score well. It is important that the students are well versed in the topics like Cell - The Unit of Life, which can make or break their score. You can go ahead and download the online PDF easily and prepare from it, all free of cost.
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