MIC 102 UC Davis questions with correct answers

Last Universal Common Ancestor (LUCA) CORRECT ANSWER Was a microbe of unknown type that lived about 4 billion years ago; the origin of all organisms. What is 16s small unit rRNA used for? CORRECT ANSWER It's used to study construct phylogenetic trees of organisms because it's highly conserved and hasn't changed much over time. Antonie von Leeuwenhoek CORRECT ANSWER Father of microscopy in 1620 Increased surface area like folded membranes CORRECT ANSWER How do larger cells maximize diffusion across surface membranes? Resolution CORRECT ANSWER Shortest distance between 2 objects that can be distinguished as seperate objects. Very important specification in microscopes. 360-700nm CORRECT ANSWER Ideal resolution range for light microscopes Fluorescent microscopy CORRECT ANSWER Fluorochromes emit specific wavelength of light when excited and can be used to tag specific molecules in a cell like a protein. Can also be engineered into genes of living cells.