IAHCSMM CRCST 8TH EDITION - CHAPTER 4 (Complete) Question and answer 100% correct 2023CHAPTER 4 - TERMS
CHAPTER 4 - TERMS
Microbiology
The study of microorganisms. The scientific study of the nature, life and action of microorganisms.
Contamination
The state of being soiled by con...
IAHCSMM CRCST 8TH EDITION - CHAPTER 4 (Complete) Question and answer 100% correct 2023
CHAPTER 4 - TERMS - correct answer CHAPTER 4 - TERMS
Microbiology - correct answer The study of microorganisms. The scientific study of the
nature, life and action of microorganisms.
Contamination - correct answer The state of being soiled by contact with infectious organisms or other material.
Pathogen - correct answer Capable of causing disease (disease-causing microorganism).
Micron - correct answer 1/25,000 of an inch or 1/1,000 of a millimeter.
Aerobic - correct answer Requiring the presence of air or free oxygen.
Anaerobic - correct answer Bacteria that can live in the absence of atmospheric oxygen.
Endospores (spores) - correct answer Microorganisms capable of forming a thick wall around themselves enabling them to survive in adverse conditions; a resistant form of bacterium.
pH - correct answer Measure of alkalinity or acidity on a scale of 0-14; pH of 7 is neutral (neither acid or alkaline); pH below 7 is acid; pH above 7 is alkaline.
Psychrophiles (bacteria) - correct answer Bacteria whose optimum temperature for growth is COLDER temperature of 59°F to 68°F (15°C to 20°C) or below.
Mesophiles (bacteria) - correct answer Bacteria that grow best at MODERATE temperatures of 68°F to 113°F (20°C to 45°C).
Thermophiles (bacteria) - correct answer Bacteria which grow best at a WARMER temperature of 122°Fto 158°F (50° to 70°C).
Vegetative stage - correct answer State of active growth of microorganisms (as opposed to the resting or spore stages).
Angstrom - correct answer A unit used to measure the length of light
waves. Binary fission - correct answer The typical method of bacterial reproduction in which a cell divides into two equal parts.
Prion - correct answer An infectious protein particle: an infectious particle of protein that, unlike a virus, contains no nucleic acid, does not trigger an immune response, and is not destroyed by extreme heat or cold.
CHAPTER 4 - PRE-TEST - correct answer CHAPTER 4 - PRE-TEST
Viral - correct answer Herpes Simplex is a [a] disease
Anaerobic - correct answer Tetanus and botulism do not require free oxygen to grow, so they are classified as [a] bacteria.
Vegetative - correct answer Sunlight is lethal to the [a] stage of pathogens.
Binary Fission - correct answer The bacterial reproductive process that takes place when a mother cell divides into two daughter cells is called [a].
Positive - correct answer Using Gram-Stain classifications, Staphlococcus, Enterococcus, and Streptococcus are examples of Gram- [a] bacteria.
Mesophiles - correct answer [a] are often pathogenic to humans because they grow best at body temperature.
Flagella - correct answer Thread-like "tails" that help bacteria move through liquids are called [a].
gram stain, Ziehl-Neilson Stain - correct answer The two most common processes designed to classify bacteria by color change are the [a] and the [b].
Nucleus - correct answer The functional center of a cell that governs activity and heredity is called the [a].
1-2 - correct answer Most bacteria are approximately [a] microns in size.
Contamination - correct answer [a] is defined as the state of being soiled or infected by contact with infectious organisms or other material.
coccus, bacillus, spirilla - correct answer Bacteria are divided into 3 main shape classifications,[a] (round), [b] (rods), and [c] (spirals).
Aerobic - correct answer Bacteria that require free oxygen to grow are called [a] bacteria.
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