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Comparing Plant And Animal Cells
Comparing Plant And Animal Cells

... cell wall - a thick, rigid membrane that surrounds a plant cell. This layer of cellulose fiber gives the cell most of its support and structure. The cell wall also bonds with other cell walls to form the structure of the plant. chloroplast - an elongated or disc-shaped organelle containing chlorophy ...
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Passive Transport (Section 5-1) Answer Sheet

... 1. What happens to the movement of molecules at equilibrium? At equilibrium, the movement of molecules continues, but because there is no concentration gradient, there is no net movement in any particular direction. 2. How do carrier proteins transport substances across cell membranes? Carrier prote ...
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... What are the main events in the cell cycle? During the cell cycle, a cell grows, prepares for division, and divides to form 2 daughter cells. The eukaryotic cell cycle has two parts: Interphase and Cell Division ...
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... Cell wall: in plants, algae, and fungi Cytoplasm: area inside the plasma membrane and outside nucleus o contains filaments (micro-, intermidiate, and microtubules) which form ...
Chapter 7 - Leon County Schools
Chapter 7 - Leon County Schools

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The nonliving outer covering of plant cells
The nonliving outer covering of plant cells

... Cells are the smallest units of structure and function of all living things. Chloroplasts help plant cells make food through a process called photosynthesis. All animal cells are the same. Plant cells have cell walls instead of cell membranes. Organelles are structures that make up a cell and aide i ...
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... 2. promoter sequence • where RNA polymerase binds and initiates transcription of all three lactose genes ...
Mitosis Root Lab
Mitosis Root Lab

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Cell Biology - Land of Mayo

... dividing cells) It promotes the polymerization of tubulin, thereby causing cell death by disrupting the normal microtubule dynamics required for cell division and vital interphase processes. ...
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AP Cell Organelles

...  Gap junctions (or communicating junctions) provide cytoplasmic channels between adjacent cells. Special membrane proteins surround these pores. Salt ions, sugar, amino acids, and other small molecules can pass. In embryos, gap junctions facilitate chemical communication during development. ...
12. Cell Test Review
12. Cell Test Review

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Cell nucleus



In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel) is a membrane-enclosed organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types have no nuclei, and a few others have many.Cell nuclei contain most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are the cell's nuclear genome. The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating gene expression—the nucleus is, therefore, the control center of the cell. The main structures making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and isolates its contents from the cellular cytoplasm, and the nucleoskeleton (which includes nuclear lamina), a network within the nucleus that adds mechanical support, much like the cytoskeleton, which supports the cell as a whole.Because the nuclear membrane is impermeable to large molecules, nuclear pores are required that regulate nuclear transport of molecules across the envelope. The pores cross both nuclear membranes, providing a channel through which larger molecules must be actively transported by carrier proteins while allowing free movement of small molecules and ions. Movement of large molecules such as proteins and RNA through the pores is required for both gene expression and the maintenance of chromosomes. The interior of the nucleus does not contain any membrane-bound sub compartments, its contents are not uniform, and a number of sub-nuclear bodies exist, made up of unique proteins, RNA molecules, and particular parts of the chromosomes. The best-known of these is the nucleolus, which is mainly involved in the assembly of ribosomes. After being produced in the nucleolus, ribosomes are exported to the cytoplasm where they translate mRNA.
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