A: The prokaryotic lacks a nucleus and other membrane bounded structures while the eukaryotic has all of those.
Q: What are ribososomes?
A: Ribososomes are compexes made of ribosomal RNA and protein, which are the cellular components that carry out protein synthesis.
Q: What are the roles of the Cytoskeleton?
A: The cytoskeleton is there to support and organize the structures and activities of the cell. The cell mobility and regulation also need cytoskeleton.
1. To study cells, biologists use microscopes and the tools of biochemistry.
2. The eukaryotic cell’s genetic instructions are housed in the nucleus and carried out by the ribosome.
3. Mitochondria and chloroplasts change energy from one form to another.
4. The Cytoskeleton is a network of fibers that organizes structures and activities in the cell.
5. Extracellular components and onnections
Figure 6.8
Geometric relationships between surface area and volume.
Math makes it that as the surface area increases, the volume decreases. Therefore, because cells need far more surface area than the volume, it is more efficient for them to have less of volume.
This chapter talks about the cells, and each of the cell organisms’ functions. Before learning those though, the chapter goes through the microscopes that scientists use to study for the cell. If prokaryotic and eukaryotic cells are compared, we can find that all cells are bounded by a plasma membrane and unlike eukaryotic cells, prokaryotic cells lack nuclei and other membrane-enclosed organelles. The surface-to-volume ration, as mentioned, is an important parameter affecting cell size and shape.
There are cytoskeleton and cell walls of the plants that are made of cellulose fibers embedded in other polysaccharides and proteins.
Keyterms
Cytosol: the liquid inside of cells.
Cytoplasm it is the contents of the cell, exclusive of the nucleus and bounded by the plasma membrane.
Chromosomes: A cellular structure carrying genetic material, found in the nucleus of eukaryotic cells.
Chromatin: The complex of DNA and protein that makes up a eukaryotic chromosome.
Ribosome: A complex of rRNA and protein molecules that functions as a site of protein synthesis in the cytoplasm.
Vesicle: A sac made of membrane in the cytoplasm.
Peroxisome: peroxisomes are roughly spherical and often have a granular or crystalline core that is thought to be a dense collection of enzyme molecules.
Flagella: A long cellular appendage specialized for locomotion.
Cilia: A short cellular appendage containing microtubules.
Lysosome: A membrane-enclosed sac of hydrolytic enzymes found in the cytoplasm of animal cells and some protests.
http://www.youtube.com/watch?v=zufaN_aetZI
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