Micro 202 Lab NDSU Exam with Complete Solutions
Differential medium - Answer-Special characteristics that differentiate microbes based on physical appearance
Serial dilution - Answer-Scientists first dilute the sample several times in a series to get a countable number
Simple stain - Answer...
Micro 202 Lab NDSU Exam
with Complete Solutions
Differential medium - Answer-Special characteristics that differentiate microbes based
on physical appearance
Serial dilution - Answer-Scientists first dilute the sample several times in a series to get
a countable number
Simple stain - Answer-Apply a single dye to differentiate between cells and background
Sterilization - Answer-eliminates all forms of life
Stock Culture - Answer-pure culture that's in use
Bacillus cereus - Answer-gram positive that stains purple
Bacillus polymyxa - Answer-breaks down starch and casein
Bacillus stearothermophilus - Answer-Thermophile, turns yellow at high temp, ferments
sugar
Clostridium sporogenes - Answer-Obligate anaerobe, grows on bottom of tube
E. Coli B - Answer-E coli, bacteriophage strain, lyses bacterial cells to show plaques
Escherichia coli - Answer-gram negative, unaffected by some antibiotics, doesn't
hydrolysis casein or starch
Micrococcus luteus - Answer-growth is most inhibited by antibiotics, cocci
Mycobacterium phlei - Answer-Stains red in acid-fast
Pseudomonas aeruginosa - Answer-most unaffected by antibiotic
Serratia marcescens - Answer-is red
Staphylococcus aureus - Answer-Inhabitant of the nose, can cause disease
, Staphylococcus epidermis - Answer-Inhabitant of the skin, not a pathogen
Streptomyces griseus - Answer-found in soil, is an actinomycete, antibiotics come from
this
Saccharomyces cerebisiae - Answer-Used in bread, beer, and fuel making, dead are
blue, live is clear
Aspergillus niger - Answer-Bread mold, look like broom
Rhizopus nigricans - Answer-Has sporangium, look like mushroom
Blood agar - Answer-Differential medium, shows the ability to break down red blood
cells
Acid Fast Stains What for positive - Answer-Red
Actinomycetes - Answer-Found in soil, bacteria that acts like fungus, many
antimicrobials come from these
Aerobic respiration - Answer-Generates most ATP, needs oxygen
Anaerobic respiration - Answer-Generates second most ATP, doesn't need oxygen
Antibiotic resistance - Answer-Bacteria that become resistant to antibiotics through bad
medical practice eventually reproduce more, and become more common
Antibiotics - Answer-Substances produced by living organisms that kill or inhibit other
microbes
Antibodies - Answer-Highly specific proteins that recognize and protect against antigens
Antigen - Answer-a molecule that induces an immune response
Antimicrobials - Answer-Chemicals that either kill or inhibit microbes
Antiseptics - Answer-Chemicals used on skin lesions to kill or inhibit pathogens
Aseptic techniques - Answer-How to pour plates, streak plates, and transfer bacteria
without cross contamination
Autoclaving - Answer-121 Degrees Celsius for 15 minutes, at 15 PSI
Pasteurization - Answer-Heat treatment at 72 degrees celsius for 15 seconds that kills
pathogens and non pathogens in liquids like milk wine etc
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