Mic 205 exam - Study guides, Class notes & Summaries

Microbial growth is an increase in (cell number/size)? CORRECT ANSWER CELL NUMBER Discrete colony CORRECT ANSWER Aggregation of cells arising from a single parent cell Visible on surface of solid media Solid media - all same DNA, replicas of e/o Dispersed cells CORRECT ANSWER Single cells suspended in liquid media Don't cluster together, they are free to spread out The more cloudy- the more cells Complex biofilm CORRECT ANSWER Collection of microbes living (adhered) on a su...

Hershey and Chase performed an experiment in order to determine how bacteriophages infect bacteria. What did they find? The bacteriophage injects DNA into the host cell. This was found because, after centrifugation, the pellet was radioactive The largest difference between a Gram + and Gram - bacterial cell is: The gram + cell has a much thicker peptidoglycan layer Why does a Gram + cell stain blue/purple in a gram stain? The Gram + cell stains blue/purple because crystal violet rem...

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Describe some of the destructive and beneficial actions of microbes. CORRECT ANSWER Marine and freshwater microorganisms form the basis of the food chain in oceans, lakes, and rivers. Soil microbes break down wastes and incorporate nitrogen gas from the air into organic compounds, thereby recycling chemical elements among soil, water, living organisms, and air. What percentage of all cells in the human body are bacterial cells? CORRECT ANSWER An adult human is composed of about 30 trillion bo...

Algae CORRECT ANSWER A photosynthetic protist. Biogenesis CORRECT ANSWER the production of living organisms from other living organisms; opposed to spontaneous generation. Domain CORRECT ANSWER Most inclusive taxonomic category; larger than a kingdom. Emerging infectious diseases CORRECT ANSWER An infectious disease that has newly appeared in a population rapidly increasing in incidence or geographic range. Eukaryote CORRECT ANSWER A cell that contains a nucleus and membrane bound or...

Matter is composed of very small units called ________? CORRECT ANSWER atoms Atoms are composed of which 3 subatomic particles? CORRECT ANSWER protons, neutrons, electrons Where are the three subatomic particles located within an atom? CORRECT ANSWER protons: inside nucleus (positive charge) neutrons: inside nucleus (no charge) electrons: hang out in energy levels around nucleus (negative charge) Purpose of electrons in an atom? CORRECT ANSWER combine an atom with other atoms to f...

-minuscule, acellular infectious agents carrying DNA or RNA -obligate intracellular parasites CORRECT ANSWER viruses F CORRECT ANSWER T/F viruses have cytoplasmic membranes, cytosol, and organelles virons CORRECT ANSWER when viruses are outside their host they are called what? - possess a protein coat (capsid) that surrounds and protects the nucleic acid (viral genome) CORRECT ANSWER what is the structure of a virus? -shed their protein capsids -exist as naked nucleic acid CORRECT...

Discrete Colony CORRECT ANSWER Aggregation of cells visible on surface of solid media Dispersed Cells CORRECT ANSWER Single cells suspended in liquid media Complex Biofilm CORRECT ANSWER community of one or more species of bacteria Logarithmic Growth in Bacteria CORRECT ANSWER increase to millions of cells in hours Clinical Specimens CORRECT ANSWER human materials examined or tested for presence of bacteria and other microbes Skin Specimen Collection Method CORRECT ANSWER sterile ...

Mic 205 exam 2 questions with correct answers.

MIC 205 Exam 1 questions with correct answer4