Bio 22 Study guides, Class notes & Summaries

Objective of oil immersion lens Correct Answer-100X Resolving power becomes _____ as magnification of the objective lens _______ Correct Answer-Greater, increases The light microscope can distinguish two points that are at least _____ um apart Correct Answer-0.2 What is used to sterilize heat sensitive liquids? Correct Answer-Filtration The streak plate technique uses spatial dilution (Increases the space b/t organisms) to create Correct Answer-pure colonies The component of MacCo...

Developed smallpox immunization using cowpox agent Correct Answer-Edward Jenner Sought a "magic bullet" to destroy pathogens & not host Correct Answer-Paul Ehrlich Discovered penicillin Correct Answer-Alexander Fleming Pioneered aseptic surgery, Prevented surgical infections by using mists of phenol Correct Answer-Joseph Lister Father of Epidemiology (Cholera in London) Correct Answer-John Snow Pioneered asepsis by discovering that hand washing prevented streptococcal infection...

What is the total magnification if you use the 40x objective lens? a. 4x b. 40x c. 400x d. 4000x Correct Answer-c. 400x What is the ability of a lens in a light microscope to gather light? a. Numerical Aperture b. Magnification c. Resolving power d. Working distance Correct Answer-a. Numerical Aperture Who is the father of bacteriology and protozoology? a. Andre Michel Lwoff b. Antonie Van Leeuwenhoek c. Lourrens Baas Becking d. Fredrick Pier Correct Answer-b. Antonie Van Le...

Carolus Linnaeus Correct Answer-system for naming plants and animals and grouping similar organisms together Carl Woese Correct Answer-o 3 Domains: Eukaryotes, Bacteria, Archaea o started sequencing rRNA, saw that 16S RNA has to be highly conserved, found that there are 3 domains of life o the phylogenetic tree is based on Woese's rRNA analysis Antoni van Leeuwenhoek Correct Answer-o made and looked through microscopes o Father of Microscopy Aristotle Correct Answer-spontaneous gene...

Know the lower limit of resolution for the light microscope Correct Answer-0.2 um Total magnification vs magnification of the oil immersion lens Correct Answer-Total magnification: product of the magnification of the ocular (10x) and the objective lens Oil immersion lens Define Resolving power Correct Answer-the ability of a microscope to differentiate two closelyk spaced objects as being distinct from one another Know how resolving power relates to magnification Correct Answer-Resolvi...

*magnification of oil immersion lens Correct Answer-100x 1.25 Lower limit of resolution with a light microscope Correct Answer-.2 um What does parfocal mean? Correct Answer-When you have the object in focus with one objective. It will be visible on all objectives with just a minor adjustment from the fine adjustment knob - a specimen in focus under the low power objectives (4x or 10x) should be nearly in focus under the oil immersion objective as well Relationship between resolving po...

Who is the father of microscopy? Antonie van Leeuwenhoek Lamp: produces visible light to illuminate the specimen Condenser: collects light and directs it through the stage opening (converges or focuses the rays of light to a single point) Iris diaphragm: regulates the amount of light available to the objective lens Factors that affect microscope function: Resolving power, numerical aperture, magnification, working distance Resolving power: ability of a microscope to differentiate two ...

An interferon is Correct Answer-a protein released by virally infected human cells to trigger production of antivirals in neighboring cells These antibodies are commonly found in mucus and are the most abundant in our body Correct Answer-IgA antibodies These cells have many identical antibodies on their surface that recognize a particular antigen. When activated the cells differentiate and proliferate into memory cells as well as plasma cells, which secrete antibodies Correct Answer-B cell...

What is the lower limit of resolution with the light microscope? Correct Answer-.2µm Define Parfocal: Correct Answer-A slide in focus will still be in focus to nearly in focus on a different objective. The magnification of the oil immersion objective is: Correct Answer-100x The total magnification of the oil immersion is: Correct Answer-1000x, Product of the magnification of the ocular (10x) and the objective lens (100x). Resolving power: Correct Answer-Ability of a microscope to di...

MMBio 222 Lab Questions with Complete Solutions