Cell Biology

Plastids: Special cell organelles in Plants and Algae

Plastids - Special cell organelles in Plants and Algae

The cytoplasm of plant cell consists of discoid, oval or spherical bodies called Plastids. They are present in all plants except bacteria, fungi, and blue-green algae. Plastids are living. They are formed a fresh but arise from minute pre-existing bodies called Protoplastids already present in embryonic cells. They multiply in …

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The Cell – Structure and Functions (Synopsis Points)

The Cell - Structure and Functions (basic synopsis)

The Cell – Structure, and Functions (Synopsis Points) – This is the basic points of the Cell. This point helps to review your basics. Just read carefully. This points made from previous topics in this blog. I. All Organisms are Made up of Cells The cell is the basic unit …

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What is the Structure, Compositions and Functions of Plasma membrane?

plasma membrane

The Plasma membrane is considered to conform to the fluid mosaic model of the cell membrane proposed by singer and Nicholson. The membrane is composed of proteins, lipids, and carbohydrates. There is wide variation in the lipid-protein ratio between different cell membrane. Lipids are asymmetrically distributed within the bilayer of …

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Cell Cycle : Sequential events in Cell Division

Cell Cycle : Sequential events in Cell Division

What is Cell Cycle ? The sequence of events which occurs between one cell division and the next¬† is called the Cell cycle. The cell cycle comprises the period between the release of a cell as one of the progeny of a division and its own subsequent division into two …

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What are the structure of Chromosomes, Types and its Functions?

Chromosomes

According to Cohn (1964), the term chromatin refers to the Feulgen positive materials observed in the interphase nucleus and later during the division of the cell nucleus. they are long, fine thread-like structures 40 to 150 A0 in diameter.  Ris (1969) has observed that chromatin fibers contain only a single DNA molecule. The term …

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