Comparison of Structure and Function of Plant Animal and Bacterial Cells
A Cell is the basic structural and functional unit of organisms. The word ‘cell’ is derived from the Latin word “cella” which means “small room”. The type and number of cells in plants and animals vary. The cells can be classified in different ways. For example, based on the presence of a nuclear membrane, the cells are classified into two types i.e Eukaryotic and prokaryotic. Cells may also be classified based on the number of cells an organism is made of i.e unicellular, multicellular, and acellular.
Brief on Animal Cell
An animal cell is typically a eukaryotic type that has a well-defined nucleus and other membrane-bound organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus. All cells are surrounded by a cell membrane or plasma membrane which separates the inner and outer components of the cell. The cell components are suspended in a fluid called cytoplasm.
Animals are multicellular organisms. The cells are specialized to perform various functions. Also, they look and function differently from each other even if they belong to the same organism.
Animal Cell Types
There are numerous types of animal cells and each of them is designed to serve specific functions. However, some of the most common types of animal cells are as follows:
Skin Cells
Melanocytes, keratinocytes, Merkel cells and Langerhans cells
Muscle Cells
Myocyte, Myosatellite cells, Tendon cells, Cardiac muscle cells
Blood Cells
Leukocytes, erythrocytes, platelet
Nerve Cells
Schwann cell, glial cells etc
Fat Cells
Adipocytes
Animal cells need to adapt to a more active and non-sedentary lifestyle as animals acquire their food, hence, they do not possess any of the specialized cell organelles such as chloroplasts.
Brief on Plant Cell
A plant cell is mainly a eukaryotic cell with a true nucleus and organelles similar to an animal cell but also consists of certain specific components such as chloroplasts which carry out photosynthesis. Plants are multicellular and have a distinct rigid wall surrounding the cells.
Plant Cell Functions
The plant cells are the building blocks of the plants. Since photosynthesis (the process of preparing food by the plants, by utilizing sunlight, carbon dioxide and water) is the major function performed by the plant cells it occurs in the chloroplasts of the plant cell.
Plant Cell Types
There are different types of plant cells some of which include the following different types:
Collenchyma Cells
These cells are hard or rigid and play a primary role in providing support to the plants if there is restraining growth due to the lack of hardening agents in the primary walls.
Sclerenchyma Cells
These are more rigid as compared to the collenchyma cells and it is because of the presence of a hardening agent. They are usually found in all the plant roots and are mainly involved in providing support to the plants.
Parenchyma Cells
The Parenchyma cells have a significant role to play in all plants. As they are the living cells of plants, which are involved in the production of leaves, they are also involved in the exchange of gasses, production of food, storage of organic products and cell metabolism. The Parenchyma cells are typically more flexible because they are thinner than other cells.
Xylem Cells
The Xylem cells are the transport cells in vascular plants. They are responsible for the transport of water and minerals from the roots to the leaves and other parts of the plants.
Phloem Cells
These are the common type of cells and the most heard ones, the phloem cells are the transport cells in vascular plants as they are responsible for transporting food which is prepared by the leaves to different parts of the plants.
Brief on Bacterial Cell
A bacterial cell is a prokaryotic cell that lacks a well-defined nucleus and membrane-bound organelles. Instead, it contains an irregular-shaped region where the genetic material is suspended. Bacteria is a single-celled organism.
Functions of a Bacterial Cell
The Cytoplasm or protoplasm is the part of the bacterial cells, where the functions for cell growth, metabolism, and replication are carried out. This is a gel-like matrix that is composed of water, enzymes, nutrients, wastes, and gasses and contains cell structures such as ribosomes, a chromosome, and plasmids.
Types of Bacteria Cells
The Bacterial cells are classified into five groups according to their basic shapes:
Spherical (cocci)
Rod (bacilli)
Spiral (spirilla)
Comma (vibrios)
Corkscrew (spirochaetes)
These can exist as single cells, in pairs, chains or clusters.
Difference Between Plant, Animal and Bacterial Cell
Conclusion
Having a brief knowledge about different bacterial cells will certainly help you in learning deeper and understanding it.
FAQs on Difference Between Plant Animal and Bacterial Cells Explained
1. What is the difference between plant, animal, and bacterial cells?
The main difference between plant cells, animal cells, and bacterial cells lies in their structure, presence of organelles, and type of cell organization.
- Plant cells are eukaryotic cells with a cell wall, chloroplasts, and a large central vacuole.
- Animal cells are eukaryotic cells without a cell wall or chloroplasts but contain centrioles and small vacuoles.
- Bacterial cells are prokaryotic cells that lack a true nucleus and membrane-bound organelles.
2. Do plant, animal, and bacterial cells all have a nucleus?
No, only plant and animal cells have a true nucleus, while bacterial cells do not.
- Plant cells and animal cells are eukaryotic, meaning their DNA is enclosed within a membrane-bound nucleus.
- Bacterial cells are prokaryotic and contain DNA in a region called the nucleoid, without a nuclear membrane.
3. What organelles are found in plant cells but not in animal or bacterial cells?
Plant cells uniquely contain chloroplasts, a large central vacuole, and a rigid cell wall made of cellulose.
- Chloroplasts carry out photosynthesis.
- The central vacuole maintains turgor pressure and stores water.
- The cell wall provides structural support.
4. How are bacterial cells different from plant and animal cells?
Bacterial cells differ because they are prokaryotic and lack membrane-bound organelles.
- No true nucleus (DNA is in the nucleoid region).
- No membrane-bound organelles like mitochondria or endoplasmic reticulum.
- Usually smaller in size (1–5 µm).
5. Do plant and animal cells have a cell wall like bacterial cells?
Plant cells and bacterial cells have a cell wall, but animal cells do not.
- Plant cell walls are made of cellulose.
- Bacterial cell walls are made of peptidoglycan.
- Animal cells only have a flexible plasma membrane.
6. Why do plant cells have chloroplasts but animal and bacterial cells do not?
Plant cells have chloroplasts because they perform photosynthesis, while animal and most bacterial cells do not.
- Chloroplasts contain chlorophyll to capture sunlight.
- They convert light energy into chemical energy (glucose).
- Animals obtain food by consuming other organisms.
7. What are the similarities between plant, animal, and bacterial cells?
Plant, animal, and bacterial cells all share basic cellular components essential for life.
- A plasma membrane that controls substance movement.
- Cytoplasm where metabolic reactions occur.
- Ribosomes for protein synthesis.
- Genetic material in the form of DNA.
8. Which is larger: plant, animal, or bacterial cells?
Plant and animal cells are generally larger than bacterial cells.
- Plant cells: about 10–100 µm.
- Animal cells: about 10–30 µm.
- Bacterial cells: about 1–5 µm.
9. How does DNA organization differ in plant, animal, and bacterial cells?
DNA in plant and animal cells is enclosed within a nucleus, while in bacterial cells it is free in the cytoplasm.
- Eukaryotic cells (plant and animal) have linear chromosomes inside the nucleus.
- Bacterial cells usually have a single circular chromosome in the nucleoid region.
10. Can you give an example of organisms with plant, animal, and bacterial cells?
Examples of organisms with plant, animal, and bacterial cells include plants, animals, and bacteria respectively.
- Plant cells: found in organisms like sunflower (Helianthus) and oak trees (Quercus).
- Animal cells: found in humans (Homo sapiens) and dogs (Canis lupus familiaris).
- Bacterial cells: found in bacteria such as Escherichia coli.
