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which ribosomes makes proteins to be exported out
bound ribosomes- attatched to endoplasmic reticulum
examples of lysomal diseases
pompe's disease- liver cant break down polysaccharide glycogen and tay-sachs- overload of lipids in nervous system
what is the difference between magnification and resolution
magnification makes it bigger resolution makes it clearer
what are the differences in TEM and SEM
sem uses a beam to scan the surface of a cell and tem shoots a beam of light through the specimen
differenced between plasma membrane and cell wall
cell wall maintence of cell shape and skeletal support and plasma membrane keeps stuff from coming in and leaving
what is the route for membrane construction in the cell
nucleus to ribosomes to rough er to golgi apparatus to transport vacuoles to plasma membrane back to transport vacuoles
layers of cell wall
there is a thin, flexible primary cell wall (btwn the 2 cell walls is the middle lamella - like glue) (pectin)
3 junctions compared to plasmodesmata
tight junctions-binds cells together Anchoring junctions - attach adjacent cells to each other to stretch Gap junctions - allow water and other small molecules to flow between neighboring cells (similar to plasmodesmata in plants) plasmodesmata
- channels in the cell wall
- strands of cytoplasm connect 1 cell to another
a plant cell was biologically engineered containing radioactive nucleotides. Later examination of the cell showed the radioactivity to be concentrated in the
if the nucleus is a cell's control center and chloroplasts its solar collectors, which of the following might be called the cell's combination food processor and garbage disposal?
the internal skeleton of a cell is composed of
microtubules,intermediate filaments, and microfilaments
which group is involved in manufacturing substances needed by the cell?
ribosome, rough er, smooth er
when elongated, tube-shaped cells from the lining of the intestine are treated with a certain chemical, the cells sag and become round blobs. the internal structures disrupted by this chemical are probably
why has the electron microscope been particularly useful in studying bacteria?
bacteria are so small
a researcher made an interesting observation about a protein made by the rough er and eventually used to build a cells plasma membrane. the protein in the membrane was actually slightly different from the protein made in the er. the protein was probably changed in the
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