LIFESCI 2 Lecture Notes - Lecture 4: Cell Membrane, Ribosome, Photosynthesis

• School: UCLA
• Department: Life Sciences
• Course: LIFESCI 2
• Professor: Arnold, A.P., Esdin, J.

Document Summary

Prokaryotes are unicellular organisms that lack a nucleus and membrane bound organelles. Eukaryotes contain membrane bound organelles and nucleus. They are bigger in size relative to their complexity and interaction with other cells. Continuous lipid bilayer surrounding the cell that may contain proteins. Peripheral proteins are found on one side of the bilayer. Integral proteins are inserted in the membrane completely or partially. Seclude the ell for its ow environment. Acts as a selective permeable barrier that controls what comes inside. Proteins are marked with zip identification tags to either be placed in the membrane, released for the cell or taken to another organelle: lysosome. Enzymes that breakdown food and foreign material. Destroy old proteins to recycle amino acids. Primary lysosome that originates from the golgi merges with a phagosome, vesicle bringing food into. 2 the cell, and becomes a secondary lysosome which exits the cell. Enzymes cannot roam around the cell freely, they are packaged in vesicles: mitochondria.