A pure culture contains - Study guides, Class notes & Summaries

Microbiology Lab Exam # 1 Questions and Answers Considering the cultures used to inoculate each medium in this exercise, how many different microbial types should you expect to see in/on each medium? (1.4) -Answer- You should only have 1 if using good sterile technique. A successful aseptic transfer will have only micrococcus lutes growth- this would be a pure culture You were asked to describe differences in appearance of growth in each culture, if present. In which medium was this the mo...

Which method often results in colonies developing down throughout the agar along with some colonies on the surface... pour plate Which of the following organisms shows the proper use of binomial nomenclature... Escherichia coli (italicized) The type of microscope in which you would see brightly illuminated specimens against a black background is... dark-field 6.5% NaCl broth favors the growth of Gram positive organisms, while inhibiting the growth of Gram negative organisms, this...

There are two cell types - prokaryotic and eukaryotic. List the 7 classes or basic types of microorganisms and identify each as prokaryotic, eukaryotic, both prokaryotic and eukaryotic, or neither. - ANSWER 1. Bacteria- prokaryotic 2. Archaea- prokaryotic 3. Algae- eukaryotic 4. Fungi- eukaryotic 5. Protozoa- eukaryotic 6. Helminthes- eukaryotic 7. Viruses- neither What is a bacterial endospore? Explain how endospore-forming bacteria could cause a scientist to believe in spontaneous gen...

BI 234 LAB PRACTICAL 1 EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED aseptic technique Purpose is to maintain pure culture by avoiding cross contamination & to avoid contaminating lab environment. aseptic technique fails if you contaminate it with unknown bacterium because you can not determine which microbe is responsible for the reaction you observe. It is to protect you & classmates from organisms that could cause disease. Quadrant streak plate technique Purpose: isolate b...

Absortion - Upon encountering a susceptible host the virus is adsorbed by binding to specific receptors on the cell membrane. These receptors are similar to the glycoproteins found on the surface of viral coat acellular infectious agents - viruses, viroids, prions acid fast stain - Differentiates acid-fast bacteria (pink) from non-acid-fast bacteria (blue). detects The agents of tuberculosis and leprosy. Agricultural Microbiology - concerned with the relationships between microbes and dom...

Five basic techniques to manipulate, grow, examine, and characterize microorganisms in the laboratory - ANSWER Inoculation, Incubation, Isolation, Inspection, Identification. Inoculation - ANSWER *Cultivation of microorganisms *Any growth that appears in or on the medium after incubation *Pure culture *A container of medium that contains only a single known species or type of microorganism

In the nitrogen cycle, which of the following steps involves removal of nitrogen from the atmosphere by bacteria? Nitrogen Fixation If enough H+ ions are added to pure water to raise the H+ concentration of the solution to ten times higher than the original concentration, what is the resulting OH- concentration of the solution? 10-8 M Fungi are able to reproduce asexually by creating conidiospores and sporangiospores. Which of the following is an accurate explanation for why it is advantag...

Prokaryote - Answer-A unicellular organism that lacks a nucleus and membrane bound organelles. Bacteria and Archaea. Eukaryote - Answer-organism whose cells contain a nucleus and membrane bound organelles. Fungi, protozoa, algea, parasatic worms, acellular infectious agents - Answer-viruses, viroids, prions Medical Microbiology - Answer-Deals with microbes that cause diseases in humans and animals Public Health Microbiology and Epidemiology - Answer-monitor and control the spread of diseas...

motility - correct answer semisolid media shows what? isolating/culturing bacteria - correct answer solid media is best for? synthetic; defined - correct answer What are the terms for a media whose exact chemical compositions are known? differential media - correct answer allows growth of several types of microbes and displays visible differences among those microbes selective media - correct answer suppress unwanted microbes and encourage desired microbes reducing media - correct...

During tissue processing, what is the correct sequence of steps ? a) clearing, dehydration, infiltration b) clearing, infiltration, dehydration c) dehydration, infiltration, clearing d) dehydration, clearing, infiltration - Answer d) dehydration, clearing, infiltration If a person has A- blood, who can they receive from within the ABO blood group? - Answer A-, ABWhat is the purpose of fixation? - Answer To stabilize proteins & colloidal material in cells/tissues so that it becomes resistan...