The Understanding Of Wall Bounded Turbulent Flows Video
The Understanding Of Wall Bounded Turbulent Flows.Exam (elaborations)
Eukaryotes protozoa, plants and animals have highly-structured cells. These cells tend to be larger than the cells of bacteria, and have developed specialized packaging and transport mechanisms that may be necessary to support their larger size.
Use the following interactive animation of plant and animal cells to learn about their respective organelles. Nucleus : The nucleus is the most obvious organelle in any eukaryotic cell. It is enclosed in a double membrane and communicates with the surrounding cytosol via numerous nuclear pores.
The chromatin is efficiently packaged within the small nuclear space. Genes within the chromatin are made of deoxyribonucleic acid DNA. The DNA is similar in every cell of the body, but depending on the specific cell type, some genes may be turned on or off - that's why a liver cell is different from a muscle cell, and a muscle cell is different from a fat cell. When a cell is dividing, the nuclear chromatin DNA and surrounding protein condenses into chromosomes that are easily seen by microscopy. For a deeper understanding of genetics, visit our companion site, GeneTiCs Alive!
Plant and Animal Cell Organelles
Nucleolus : The prominent structure in the nucleus is the nucleolus. The nucleolus produces ribosomes, which move out of the nucleus and take positions on the rough endoplasmic reticulum where they are critical in protein synthesis.
Cytosol : The cytosol is the "soup" within which all the other cell organelles reside and where most of the cellular metabolism occurs. Though mostly water, the cytosol is full of proteins that control cell metabolism including signal transduction pathways, glycolysis, intracellular receptors, and transcription factors. Cytoplasm : This is a collective term for the cytosol plus the organelles suspended within the cytosol. Plant and animal cell centrosomes play similar roles in cell division, and both include collections of microtubules, but the plant cell centrosome is simpler and does not have centrioles. During animal cell division, the centrioles replicate make new copies and the centrosome divides. The result is two centrosomes, each with its own pair of centrioles.
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The two centrosomes move to opposite ends of the nucleus, and from each centrosome, microtubules grow into a "spindle" which is responsible for separating replicated chromosomes into the two daughter cells. There are three microtubules in each group. Microtubules and centrioles are part of the cytoskeleton.]
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