Cell Biology

Definition Plant cells are the basic unit of life in organisms of the kingdom Plantae. They are eukaryotic cells, which have a true nucleus along …

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Organelle Definition The term organelle is derived from the word ‘organ’ and refers to compartments within the cell that perform a specific function. These compartments …

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Nuclear Membrane Definition The nuclear membrane, also called the nuclear envelope, is a double membrane layer that separates the contents of the nucleus from the …

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Definition Nondisjunction occurs when chromosomes do not separate properly during cell division. This produces cells with imbalanced chromosome numbers. Chromosomes contain the cell’s DNA, which …

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Mucous Membrane Definition A mucous membrane, also known as a mucosa (plural: mucosae), is a layer of cells that surrounds body organs and body orifices. …

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Mitosis Definition Mitosis is the step in the cell cycle that the newly duplicated DNA is separated, and two new cells are formed. This process …

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Microtubule Definition Microtubules are microscopic hollow tubes made of the proteins alpha and beta tubulin that are part of a cell’s cytoskeleton, a network of …

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Microfilament Definition Microfilaments, also called actin filaments, are polymers of the protein actin that are part of a cell’s cytoskeleton. The cytoskeleton is the network …

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Definition The first metaphase of meisosis I encompasses the alignment of paired chromosomes along the center (metaphase plate) of a cell, ensuring that two complete …

Read moreMetaphase I: Definition and Stages