Long Answer Questions
1. Discuss in brief the structure and functions of any five organelles of cell.
hlononloat and discuss about its structure and functions in brief.
Answers
Answer:
Cell organelle is a specialized entity present inside a particular type of cell that performs a specific function.
There are various cell organelles, out if which, some are common in most types of cells like cell membranes, nucleus, and cytoplasm. However, some organelles are specific to one particular type of cell-like plastids and cell walls in plant cells.
Cell Organelles- Structure and Functions with diagram
A plasma membrane is composed of lipids and proteins where the composition might fluctuate based on fluidity, external environment, and the different stages of development of the cell.
Structure
Structurally, it consists of a phospholipid bilayer along with two types of proteins viz. embedded proteins and peripheral proteins that function in providing shape and allowing the movement of particles in and out of the cell.
The most abundant lipid which is present in the cell membrane is a phospholipid which contains a polar head group attached to two hydrophobic fatty acid tails.
The embedded proteins act as channels for the transfer of particles across the cell with some proteins acting as receptors for the binding of various components.
The peripheral proteins function as to provide fluidity as well as mechanical support to the structure of the cell.
Plasma membrane (Cell membrane) Diagram
Functions
The cell membrane provides mechanical support that facilities the shape of the cell while enclosing the cell and its components from the external environment.
It regulates what can be allowed to enter and exit the cell through channels, acting as a semi-permeable membrane, which facilities the exchange of essential compounds required for the survival of the cell.
It generates and distributes signals in and outside of the cell for the proper functioning of the cell and all the organelles.
It allows the interaction between cells required during tissue formation and cell fusion
cell wall:An additional non-living layer present outside the cell membrane in some cells that provides structure, protection, and filtering mechanism to the cell is the cell wall.
An additional non-living layer present outside the cell membrane in some cells that provides structure, protection, and filtering mechanism to the cell is the cell wall.Structure
An additional non-living layer present outside the cell membrane in some cells that provides structure, protection, and filtering mechanism to the cell is the cell wall.StructureIn a plant cell, the cell wall is made up of cellulose, hemicellulose, and proteins while in a fungal cell, it is composed of chitin.
An additional non-living layer present outside the cell membrane in some cells that provides structure, protection, and filtering mechanism to the cell is the cell wall.StructureIn a plant cell, the cell wall is made up of cellulose, hemicellulose, and proteins while in a fungal cell, it is composed of chitin.A cell wall is multilayered with a middle lamina, a primary cell wall, and a secondary cell wall.
An additional non-living layer present outside the cell membrane in some cells that provides structure, protection, and filtering mechanism to the cell is the cell wall.StructureIn a plant cell, the cell wall is made up of cellulose, hemicellulose, and proteins while in a fungal cell, it is composed of chitin.A cell wall is multilayered with a middle lamina, a primary cell wall, and a secondary cell wall.Middle lamina contains polysaccharides that provide adhesion and allows binding of the cells to one another.
An additional non-living layer present outside the cell membrane in some cells that provides structure, protection, and filtering mechanism to the cell is the cell wall.StructureIn a plant cell, the cell wall is made up of cellulose, hemicellulose, and proteins while in a fungal cell, it is composed of chitin.A cell wall is multilayered with a middle lamina, a primary cell wall, and a secondary cell wall.Middle lamina contains polysaccharides that provide adhesion and allows binding of the cells to one another.After middle lamina is the primary cell wall which is composed of cellulose. The last layer, which is not always present, is the secondary cell wall made of cellulose and hemicellulose.
An additional non-living layer present outside the cell membrane in some cells that provides structure, protection, and filtering mechanism to the cell is the cell wall.StructureIn a plant cell, the cell wall is made up of cellulose, hemicellulose, and proteins while in a fungal cell, it is composed of chitin.A cell wall is multilayered with a middle lamina, a primary cell wall, and a secondary cell wall.Middle lamina contains polysaccharides that provide adhesion and allows binding of the cells to one another.After middle lamina is the primary cell wall which is composed of cellulose. The last layer, which is not always present, is the secondary cell wall made of cellulose and hemicellulose.Cell Wall (Plant, Fungal, Bacterial)
Explanation:
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