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7.391 Concept-Centered Teaching Semester I

... 1. Students have difficulty visualizing biological molecules in 3D and understanding that these molecules interact because they can via a series of dynamic interactions. 2. Students rarely see the connection between what they are learning in class and everyday biological processes like diseases or e ...
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A eukaryotic cell has a true membrane-bound nucleus
A eukaryotic cell has a true membrane-bound nucleus

... vesicles, there is a very subtle distinction between them: the membranes of vesicles can fuse with either the plasma membrane or other membrane systems within the cell. All of these organelles are found in each and every eukaryotic cell. ...
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Signal transduction



Signal transduction occurs when an extracellular signaling molecule activates a specific receptor located on the cell surface or inside the cell. In turn, this receptor triggers a biochemical chain of events inside the cell, creating a response. Depending on the cell, the response alters the cell's metabolism, shape, gene expression, or ability to divide. The signal can be amplified at any step. Thus, one signaling molecule can cause many responses.
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