Cell Biology

Cell Biology Notes, Cell Organelles Notes including Definition, Structure, Functions, and Diagram.

Cell Organelles Notes including Definition, Structure, Functions, and Diagram

Types of Plant Cell – Definition, Structure, Functions, Diagrams

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Types of Plant Cell

Definition and overview of a plant cell Plant cells are multicellular eukaryotic cells that make up a plant (a group of eukaryotes belonging to the Plantae kingdom, with the ability to synthesis their own food using water, Sunlight and CO2). Being eukaryotic cells, they have a defined nucleus with specialized structural organelles that enable it … Read more Types of Plant Cell – Definition, Structure, Functions, Diagrams

Plant cell and animal cell differences (plant cell vs animal cell)

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Plants and animals are made up of millions of cells and these cells have several similarities and differences. Considering that they are both eukaryotic cells, which means they have a true nucleus, that is enclosed and separated from other organelles by a nuclear membrane, is a crucial factor that defines their modes of multiplication. They … Read more Plant cell and animal cell differences (plant cell vs animal cell)

Plant cell- definition, labeled diagram, structure, parts, organelles

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plant cell labeled diagram

Definition of plant cell Plant cells are eukaryotic cells, that are found in green plants, photosynthetic eukaryotes of the kingdom Plantae which means they have a membrane-bound nucleus. They have a variety of membrane-bound cell organelles that perform various specific functions to maintain the normal functioning of the plant cell. Structure of Plant cell Generally, … Read more Plant cell- definition, labeled diagram, structure, parts, organelles

Animal Cell – Definition, Structure, Parts, Functions and Diagram

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Definition of animal cell Animals are a large group of diverse living organisms that make up to three-quarters of all species on earth. With their ability to move, to respond to stimuli, respond to environmental changes and adapt to different modes of feeding defense mechanisms and reproduction, all these mechanisms are enhanced by their constituent … Read more Animal Cell – Definition, Structure, Parts, Functions and Diagram

Stem Cells- Sources, Characteristics, Types, Uses

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Stem Cells- Sources, Characteristics, Types, Uses

Stem cells refer to such cells that can differentiate into other types of cells and can also divide in self-renewal to produce more of the same type of same cells. The earliest stem cells in the human body are those found in the human embryo. The stem cells inside an embryo will eventually give rise … Read more Stem Cells- Sources, Characteristics, Types, Uses

Cytoskeleton- Definition, Structure, Functions and Diagram

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Cytoskeleton

Cytoskeleton Definition The cytosol of cells contains fibers that help to maintain cell shape and mobility and that probably provide anchoring points for the other cellular structures. Collectively, these fibers are termed as the cytoskeleton. The cytoskeleton gives cells structure and shape and allows them to move around. It’s also important for intracellular transport.  At … Read more Cytoskeleton- Definition, Structure, Functions and Diagram

Passive Transport

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Passive Transport

Passive Transport Plasma membranes must allow certain substances to enter and leave a cell, and prevent some harmful materials from entering and some essential materials from leaving. In other words, plasma membranes are selectively permeable—they allow some substances to pass through, but not others. If they were to lose this selectivity, the cell would no longer … Read more Passive Transport

Membrane Proteins

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Membrane Proteins

Membrane Proteins Biological membranes consist of a continuous double layer of lipid molecules in which membrane proteins are embedded. Although the lipid bilayer provides the basic structure of biological membranes, the membrane proteins perform most of the membrane’s specific tasks and therefore give each type of cell membrane its characteristic functional properties. The amounts and … Read more Membrane Proteins

Lysosomes- Definition, Structure, Functions and Diagram

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Lysosomes- Structure, Enzymes, Types, Functions

Lysosomes Definition Lysosomes are membrane-bound, dense granular structures containing hydrolytic enzymes responsible mainly for intracellular and extracellular digestion. The word “lysosome” is made up of two words “lysis” meaning breakdown and “soma” meaning body. It is an important cell organelle responsible for the inter and extracellular breakdown of substances. They are more commonly found in … Read more Lysosomes- Definition, Structure, Functions and Diagram

Membrane Lipids

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Membrane Lipids

Membrane Lipids Biological membranes consist of a lipid bilayer to which proteins and carbohydrates may be associated or covalently linked. Membrane lipids are lipids involved in forming the structure of biological membranes – both the cell membrane and intracellular membranes – and in membrane function, namely compartmentalization of biological processes. Membrane lipids consist primarily of … Read more Membrane Lipids

Plasmodesmata- Definition, Structure, Functions and Diagram

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Plasmodesmata- Structure and Functions

Plasmodesmata Definition Every living cell in a higher plant is connected to its living neighbors by fine cytoplasmic channels, each of which is called a plasmodesma which passes through the intervening cell walls. They act like tunnels running through the cell wall which allow communication with the other cells in a tissue. The plasma membrane … Read more Plasmodesmata- Definition, Structure, Functions and Diagram

Peroxisomes- Definition, Structure, Functions and Diagram

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Structure of Peroxisomes

Peroxisomes Definition Peroxisomes are small, membrane-enclosed cellular organelles containing oxidative enzymes that are involved in a variety of metabolic reactions, including several aspects of energy metabolism. They are considered as an important type of microbody found in both plants and animal cells. They were identified as organelles by Belgian cytologist Christian de Duve in 1967 … Read more Peroxisomes- Definition, Structure, Functions and Diagram

Vesicles- Definition, Structure, Functions and Diagram

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Vesicles- Structure, Types, and Functions

Vesicles Definition Cells must be able to move molecules, digest particles, and secrete materials in order to survive. For many cellular functions, vesicles are used. It is a small, spherical compartment that is separated from the cytosol by at least one lipid bilayer. Many vesicles are made in the Golgi apparatus and the endoplasmic reticulum … Read more Vesicles- Definition, Structure, Functions and Diagram