write one function of cell membrane,cell wall,,chromosomes
Answers
Answer:
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 coined 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.
Explanation:
1. 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.
2. The main functions of the cell wall are:
- 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 allows entry of smaller molecules through it freely.
3. The most important function of chromosomes is to carry the basic genetic material – DNA. DNA provides genetic information for various cellular functions. These functions are essential for growth, survival, and reproduction of the organisms. Histones and other proteins cover the Chromosomes.
Answer:
1.cell membrane is an boundary of a cell that contains cytoplasm and nucleus in the center.
2.cell wall is also a n boundary of a cell but only in plants that give a structure to a cell and protect cell membrane .
3.chromosomes are thread like structure that contatains special characteristics of a parent called genes