BIOLOGY 1A03 Lecture Notes - Lecture 1: Fluorescent Tag, Endoplasmic Reticulum, Dental Plaque

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Rosa Da Silva

Document Summary

Prokaryotic cells have been around for the longest time with eukaryotic cells only appearing about 2 billion years ago. Cells are small single units of life. At 2 billion years ago a prokaryotic cell engulfed a. We"re all rooted in one ancestral cell. Therefore we all have the same macromolecules. Sometimes we can"t study something on a eukaryotic cell. So we have to use prokaryotes as a module. Robert hooke fashioned his own magnification device. First person to see a biological specimen 30x its size with his apparatus (he looked at fleas) Look at bark tissues from a tree. Cut up really thin structures and saw small compartments called cells. Looked like monks in the modestaries (thats where we got the term cell) He fashioned glass and did 10x better than hooke. He also looked at sperm cells (probably jizzed and put it in a microscope) And then you end up seeing the specimen under microscope.