Why are nucleus, cytoplasm and cell membrane regarded as the essential components of an eukaryotic cell?
Answers
Answer:
Not only nucleus, cytoplasm and cell membrane, all the components of the cell is important. The cell which lacks any organelle cannot survive, every organelle is important for a cell to survive.
Explanation:
But if you ask for functions then,
1. Nucleus:- Contains DNA, controls the whole cell.
2. Cytoplasm:- Provide matrix for the cell, many metabolism occurs here, transportation, protein synthesis, etc.
3. Cell membrane:- Helps the cell to partially isolate from general surrounding, protective, etc
A cell is the structural and functional working unit of life and also been described as building blocks and fundamental unit of an organism. The term cell was first identified by an English philosopher Robert Hooke in the year 1665. The shape and size of the cells vary according to their functions and compositions. There are different types of cells and can be differentiated based on the presence and absence of few cell organelles.
Table of Contents
Cell Wall
Cell Membrane
Difference between Cell Wall and Cell Membrane
Conclusion
Important Questions for Cell Wall and Cell Membrane
Cell Wall
Cell Wall
The cell wall is present only in plants, fungi, and bacteria. The image above represents a plant cell wall
The cell wall is the outermost covering of plant cells. It is present outside the cell membrane and is tough, flexible and sometimes rigid in its texture. It is mainly composed of cellulose, long fibres of carbohydrates including hemicellulose, lignin, and pectin.
The main functions of the cell wall
Protecting the cell against physical damage and invading pathogens.
Regulate and controls the direction of cell growth.
Providing the strength, structural support and maintaining the shape of the cell.
Functions as a storage unit by storing carbohydrates for use in plant growth, especially in seeds.
It acts as a selectively permeable membrane by allowing the entry of small molecules to pass through it.
Explore More: Plant cell
Cell Membrane
Cell Membrane is present in all organisms including plants
The cell membrane is also known as the plasma membrane. It is the outermost covering of animal cells. It is a semi-permeable membrane composed of lipids and proteins. The main functions of the cell membrane include:
Protecting the integrity of the interior cell.
Providing support and maintaining the shape of the cell.
Helps in regulating cell growth through the balance of endocytosis and exocytosis.
The cell membrane also plays an important role in cell signalling and communication.
It acts as a selectively permeable membrane by allowing the entry of only selected substances into the cell.