Table of Contents
Introduction to Cells; Eukaryotic Cells; Main Components of Eukaryotic Cells; Common Characteristics of Eukaryotic Cells
; Prokaryotic Cells
Cells are the smallest units of life. All living things are made up of cells. Cells are so small that you need a microscope to see them.
There are two types of cells: prokaryotic cells and eukaryotic cells.
Prokaryotic cells are the simplest type of cell. They are found in bacteria and other single-celled organisms.
Eukaryotic cells are more complex. They are found in plants, animals, and other multi-celled organisms.
Eukaryotic cells have a number of features in common, including:
-A plasma membrane, which surrounds the cell and protects it
-An inner cell membrane, which separates the cell’s contents from its environment
-A nucleus, which contains the cell’s DNA
-Organelles, which are specialized structures that carry out specific functions in the cell
-A cytoskeleton, which helps the cell maintain its shape and move
Prokaryotic cells do not have a nucleus or organelles. They do have a cytoskeleton, which helps them move.
Definition of Prokaryotic Cells
Prokaryotic cells are cells without a nucleus, and they are the simplest type of cell. They are found in bacteria and archaea. Prokaryotic cells are generally about 1 micrometer in diameter.
Main Components of Prokaryotic Cells
The main components of prokaryotic cells are the plasma membrane, cytoplasm, and DNA. The plasma membrane is a lipid bilayer that surrounds the cell and controls what enters and leaves the cell. The cytoplasm is the gel-like substance inside the cell that contains the cell’s organelles. The DNA is located in the cell’s nucleus and contains the genetic information that controls the cell’s functions.
Additional Structure of Prokaryotic Cells
The additional structure of prokaryotic cells includes the cell wall, the cytoplasmic membrane, and the ribosomes.
The cell wall is a tough, protective layer that surrounds the cell. The cytoplasmic membrane is a thin, flexible layer that surrounds the cytoplasm. The cytoplasm contains the cell’s DNA, proteins, and other organelles. The ribosomes are small, round structures that produce proteins.
Common Characteristics of Prokaryotic Cells
Prokaryotic cells are typically much smaller than eukaryotic cells, and they lack a plasma membrane and other membrane-bound organelles. Additionally, prokaryotic cells typically lack a nuclear membrane, and the DNA is not organized into chromosomes. Prokaryotic cells also typically lack internal compartments, and the cytoplasm is homogeneous. Finally, prokaryotic cells typically have a simple organization, with a single chromosome and a few ribosomes.
Definition of Eukaryotic Cells
Eukaryotic cells are cells that have a nucleus and other organelles enclosed within a plasma membrane. Prokaryotic cells lack a nucleus and other organelles.
Eukaryotic Cells Consist of the Following Components that Make up their Structure:
Eukaryotic cells consist of a plasma membrane, cytoplasm, organelles, and a nucleus. The plasma membrane is a thin, flexible, and selective barrier that separates the cell from its environment. The cytoplasm is the semifluid substance inside the plasma membrane and contains the cell’s organelles. The organelles are specialized structures that carry out specific functions in the cell. The nucleus is a small, dark-staining organelle that contains the cell’s DNA.
Some of the Most Common Features of Eukaryotic Cells are:
-Growth and Division
Difference Between Prokaryotic and Eukaryotic Cells
Prokaryotic cells are cells that do not have a nucleus or other membrane-bound organelles. Eukaryotic cells are cells that do have a nucleus and other membrane-bound organelles.
Eukaryotic cells are distinguished from prokaryotic cells by the presence of a plasma membrane and a cytoskeleton. The plasma membrane is a selectively permeable barrier that surrounds the cell and regulates the exchange of molecules between the cell and its environment. The cytoskeleton is a network of protein filaments that gives the cell its shape and helps to transport molecules and organelles within the cell.
The cytoplasm of a eukaryotic cell is divided into the nucleus, the cytoplasm, and the organelles. The nucleus is a large, spherical structure that contains the cell’s DNA. The cytoplasm is the gel-like substance that surrounds the nucleus and contains the organelles. The organelles are the structures that carry out the cell’s functions, such as manufacturing proteins and respiring.
Eukaryotic cells also have a variety of specialized structures called organelles that carry out specific functions. The most important organelles are the mitochondria, which produce energy for the cell, and the chloroplasts, which convert sunlight into chemical energy.