Nuclear Envelope
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The Nuclear Envelope is a bi-membrane layer surrounding the nucleus. It separates the nucleus from the cytoplasm outside of the membrane layers. It has pores in it that allows for Proteins and RNA to pass through it. The pores don't allow other molecules like water and ATP to pass through, giving the NE some authority in the cell. It contains chromatin on the inside of the NE.
Centrioles
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Centrioles help the cell divide when it comes to that point and is located by the nucleus.The are made of microtubules. There are two centrioles in a cell that are attached together by "threads" called the mitotic spindle. Centrioles are only visible when it comes time to divide. Once the cell is resting during a cell division is when centrioles themselves begin to divide.
Peroxisomes
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Peroxisomes are very similar to lysosomes. Peroxisomes are like a packaging plant, they also help to digest alcohols, amino acids, and fatty acids. They contain the enzymes that require a lot of oxygen. They are made of a single membrane, a crystalline core, and digestive enzymes, yet no one knows the purpose of the membrane to this date. It is floating in the cytoplasm of a cell.
Cytoskeleton
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The Cytoskeleton helps the cell with movement, shape, and support. It is made up of microtubules, microfilaments, and intermediate filaments. It is found throughout the cell in multiple locations.
Intercellular Junction: Plasmodesmata
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Plasmodesmata helps to transport materials from cell to cell, and to allow cells to communicate with each other. They are located in extremely narrow areas of the plant cell's cell wall. There can be millions in just one square millimeter. They are shaped like narrow channels and has a plasma membrane surrounding it.