What is cell give me full definition and explain
Answers
Answer:1. A smallest structural and functioning unit of a organism .
2.It is the building block of a organism.
3. cells is the typically microscopic and consist of cytoplasm and nucleus enclosed in a membrane.
Explanation:
Cell Definition
Cells are the basic unit of life. In the modern world, they are the smallest known world that performs all of life’s functions. All living organisms are either single cells, or are multicellular organisms composed of many cells working together.
Cells are the smallest known unit that can accomplish all of these functions. Defining characteristics that allow a cell to perform these functions include:
A cell membrane that keeps the chemical reactions of life together.
At least one chromosome, composed of genetic material that contain the cell’s “blueprints” and “software.”
Cytoplasm – the fluid inside the cell, in which the chemical processes of life occur.
Below we will discuss the functions that cells must fulfill in order to facilitate life, and how they fulfill these functions.
Function of Cells
Scientists define seven functions that must be fulfilled by a living organism. These are:
A living thing must respond to changes in its environment.
A living thing must grow and develop across its lifespan.
A living thing must be able to reproduce, or make copies of itself.
A living thing must have metabolism.
A living thing must maintain homeostasis, or keep its internal environment the same regardless of outside changes.
A living thing must be made of cells.
A living thing must pass on traits to its offspring.
It is the biology of cells which enables living things to perform all of these functions. Below, we discuss how they make the functions of life possible.
How Cells Work
In order to accomplish them, they must have:
A cell membrane that separates the inside of the cell from the outside. By concentrating the chemical reactions of life inside a small area within a membrane, cells allow the reactions of life to proceed much faster than they otherwise would.
Genetic material which is capable of passing on traits to the cell’s offspring. In order to reproduce, organisms must ensure that their offspring have all the information that they need to be able to carry out all the functions of life.All modern cells accomplish this using DNA, whose base-pairing properties allow cells to make accurate copies of a cell’s “blueprints” and “operating system.” Some scientists think that the first cells might have used RNA instead.
Proteins that perform a wide variety of structural, metabolic, and reproductive functions.
There are countless different functions that cells must perform to obtain energy and reproduce.
Depending on the cell, examples of these functions can include photosynthesis, breaking down sugar, locomotion, copying its own DNA, allowing certain substances to pass through the cell membrane while keeping others out, etc.
Proteins are made of amino acids, which are like the “Legos” of biochemistry. Amino acids come in different sizes, different shapes, and with different properties such as polarity, ionic charge, and hydrophobicity.
By putting amino acids together based on the instructions in their genetic material, cells can create biochemical machinery to perform almost any function.
Some scientists think that the first cells might have used RNA to accomplish some vital functions, and then moved to much more versatile amino acids to do the job as the result of a mutation.
The different cell types we will discuss below have different ways of accomplishing these functions.