What is Cell
A cell is the basic unit of a living organism. It means each living organism is made up or one or more cells. That’s why cell is called building blocks of a life. Cell is capable to do all the activities of that is necessary of a life like respiration, growth, reproduction, transport of material etc.
Why Is the Cell Called the Structural Unit of Life?
cell is called structure unit of life because every living organism is made up of cell and it provide a structure or a view to a living organism. it create how a organism looks.
For example : Like many bricks create a house that shows their structure. just like Cell provide structure to any organism.
Why Is the Cell Called the Functional Unit of Life?
Cell is called the functional unit of life because every cell performs all the essential life processes such as respiration, nutrition, growth, excretion, reproduction, and movement. These functions are necessary for the survival of every living organism. Inside the cell there are many organelles that work together to carry out these activities.
For example:
- Mitochondria produce energy for the cell.
- Ribosomes make proteins.
- Lysosomes digest waste materials.
Structure Formation
| Level of Organization | Explanation with Example |
|---|---|
| Cell | A muscle cell is the basic structural and functional unit of life. |
| Tissue | Many muscle cells combine to form muscle tissue. |
| Organ | Different tissues (including muscle tissue) work together to form an organ such as the heart, liver, kidney, or lungs. |
| Organ System | Multiple organs work together to form an organ system such as the circulatory system which includes the heart and blood vessels. |
| Organism | All the organ systems work together to form a complete organism for example human body. |
So we can say that Without cells , an organism can’t be exists.
Most Popular MCQ’s in Exam
| Question | Answer |
|---|---|
| Smallest unit of life | Cell |
| Structural unit because | It Forms body provide structure. |
| Functional unit because | Performs life processes such as respiration, reproduce, |
| Discovered by | Robert Hooke |
| Cell Theory | Cell theory states that all organism is made up of cells. |
| DNA found in | Nucleus |
| Powerhouse of cell | Mitochondria |
| Plant-only organelle | Chloroplast |
| Largest human cell | Egg cell |
| Longest cell | Nerve cell |
