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This set of 500 flashcards covers key concepts from Module 6, including Microbiology, Public Health, Qualitative Pharmaceutical Chemistry, and Quality Assurance/Quality Control as derived from the lecture transcript.
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Which scientific discipline is defined as the study of organisms not visible to the naked eye?
Microbiology
What are the three main domains of living organisms according to the lecture notes?
What is the typical size range for a prokaryotic cell?
0.2−2.0μm in diameter
Which eukaryotic microorganisms are described as non-photosynthetic and can be unicellular (yeasts) or multicellular (molds)?
Fungi
True or False: Viruses are a medically important domain of microorganisms.
False (They are not a domain of microorganisms but are medically significant entities)
What is the term for infectious proteinaceous agents that lack nucleic acid?
Prions
What disease is commonly associated with prions in cattle?
Bovine spongiform encephalopathy (Mad cow disease)
Which organelle is present in eukaryotes but absent in prokaryotes?
A true nucleus (and membrane-bound organelles)
Prokaryotic DNA is typically found in what form?
Single circular chromosomes
What is the name for the extrachromosomal DNA in bacteria that may carry resistance or fertility factors?
Plasmid
What are the ribosomal subunits for a 70S prokaryotic ribosome?
50S and 30S
What are the ribosomal subunits for an 80S eukaryotic ribosome?
60S and 40S
Which substance makes up the cell wall of fungi?
Chitin
What substance makes up the cell wall of plants?
Cellulose
Which sterol is found in the plasma membrane of animal cells?
Cholesterol
Which sterol is found in the plasma membrane of fungi?
Ergosterol
By what process do prokaryotic cells typically divide?
Binary Fission
By what process do eukaryotic cells typically divide?
Mitosis
What is the term for the movement of cytoplasm within a cell, characteristic of eukaryotes?
Cytoplasmic streaming
What structure do viruses use for their 'cell division' equivalent?
Replication
What type of asexual reproduction is used by fungi like yeasts, involving an outgrowth that separates?
Budding
What is the term for the ingestion of a prokaryotic cell by a eukaryotic cell?
Phagocytosis
What is the term for the ingestion of a virus by a eukaryotic cell?
Pinocytosis
What viscous, gelatinous layer is composed of polysaccharides or polypeptides and surrounds some bacteria?
Glycocalyx
What is the unorganized and loosely attached external layer of the glycocalyx called?
Slime Layer
What is the organized and firmly attached external layer of the glycocalyx called?
Capsule
Which staining method is used to visualize bacterial capsules?
Welch Method (Capsule Staining)
What are the reagents used in the Welch Method for capsule staining?
Crystal Violet and Copper Sulfate
What is the bacterial organ of locomotion?
Flagella
What is the term for the characteristic movement of flagellated bacteria?
Run and tumble movement
What is the term for movement in response to the presence of a chemical?
Chemotaxis
What protein makes up the flagella?
Flagellin
How is a bacterium described if it has no flagella?
Atrichous
How is a bacterium described if it has a single flagellum at one pole?
Monotrichous
How is a bacterium described if it has two flagella at two poles?
Amphitrichous
How is a bacterium described if flagella are distributed throughout the entire cell?
Peritrichous
What specialized structure for motility is found in spirochetes?
Axial Filament (Endoflagella)
Which part of the prokaryotic cell contains enzymes and storage granules in an aqueous suspension?
Cytoplasm
What are the specialized resting cells in bacteria that are highly durable and resistant?
Endospores (bacterial spores)
What is the process of a vegetative cell forming an endospore?
Sporulation (Sporogenesis)
What is the process of an endospore returning to a vegetative state?
Germination
Which staining method is used for endospores?
Schaeffer-Fulton Stain
What chemical compound is responsible for the heat resistance of endospores?
Dipicolinic Acid
What are the proteinaceous hair-like appendages used for attachment in bacteria?
Fimbriae (Common pili)
Which type of pili is used for the transfer of DNA during bacterial conjugation?
Sex pili (F pili)
What complex carbohydrate-protein polymer makes up the bacterial cell wall?
Peptidoglycan
Which type of bacteria has a thick layer of peptidoglycan and teichoic acid?
Gram-positive
Which type of bacteria has a thin layer of peptidoglycan and an outer membrane containing Lipopolysaccharide?
Gram-negative
Who developed the Gram staining procedure?
Hans Christian Gram
What is the primary stain used in Gram staining?
Crystal Violet
What is the mordant used in Gram staining?
Iodine
What is the decolorizer used in Gram staining?
Alcohol
What is the counterstain used in Gram staining?
Safranin
What color do Gram-positive bacteria appear after staining?
Purple/Violet
What color do Gram-negative bacteria appear after staining?
Red/Pink
Which bacterial genus is an exception to Gram staining and requires acid-fast staining?
Mycobacterium
What waxy substance in the cell wall makes Mycobacteria acid-fast?
Mycolic Acid
What is the primary stain used in the Ziehl-Neelsen acid-fast staining method?
Carbol Fuchsin
What is the counterstain used in acid-fast staining?
Methylene Blue
What color do acid-fast organisms appear?
Red/Pink
Which staining method produces colorless organisms against a dark background?
Negative Staining
What is the H antigen associated with in bacterial identification?
Flagella
What is the V antigen associated with in bacterial identification?
Cell wall
Which scientist first observed 'cells' in a slice of cork?
Robert Hooke
Who is known as the 'Father of Microbiology' and first observed microorganisms (animalcules)?
Anton van Leeuwenhoek
Which scientist proposed the Theory of Biogenesis ('Life could only arise from pre-existing living cells')?
Rudolf Virchow
Which scientist disproved spontaneous generation using the Swan-neck Flask experiment?
Louis Pasteur
Who is known as the 'Father of Immunology' for developing vaccines for anthrax and rabies?
Louis Pasteur
What heating process uses 60∘C for 30 minutes to kill food spoilage organisms but not endospores?
Pasteurization
Which doctor introduced the importance of handwashing to prevent puerperal sepsis?
Ignaz Semmelweis
Who is the 'Father of Aseptic Technique' and used phenol as a wound disinfectant?
Joseph Lister
Who developed the pure culture technique and Koch's Postulates?
Robert Koch
Which scientist discovered the causative agent of Anthrax (Bacillus anthracis)?
Robert Koch
Who discovered the first vaccine (for smallpox)?
Edward Jenner
Who is the 'Father of Chemotherapy' and discovered Salvarsan against syphilis?
Paul Ehrlich
Which scientist discovered the first antibiotic, Penicillin?
Alexander Fleming
What is the source organism of Penicillin?
Penicillium notatum (a mold)
Who discovered Streptomycin from bacteria found in soil?
Selman Waksman
What are 'cold-loving' microbes that grow between 5−20∘C called?
Psychrophiles
What are 'moderate temperature-loving' microbes that grow between 30−50∘C called?
Mesophiles
What are 'heat-loving' microbes that grow between 40−90∘C called?
Thermophiles
What are organism that require a high salt concentration for growth called?
Extreme Halophiles
Which term describes organisms that require oxygen to live?
Strict / Obligate Aerobes
Which term describes organisms that die in the presence of oxygen?
Strict / Obligate Anaerobes
What enzyme converts superoxide free radicals into oxygen and hydrogen peroxide?
Superoxide dismutase
What enzyme converts hydrogen peroxide into water and oxygen?
Catalase
Which organisms use CO2 as their primary carbon source?
Autotrophs
What is the name for organisms that grow best in high concentrations of carbon dioxide?
Capnophiles
Which growth phase is characterized by little or no cell division as the organisms adjust to their environment?
Lag Phase
Which growth phase is characterized by exponential logarithmic growth and rapid cell division?
Log Phase
Which growth phase occurs when the number of new cells equals the number of dying cells?
Stationary Phase
Which growth phase occurs when the number of deaths exceeds the number of new cells?
Death Phase (Logarithmic Decline Phase)
What type of culture media has an exactly known chemical composition?
Synthetic / Chemically Defined Media
Which medium is used to suppress unwanted microbes and encourage the growth of desired ones?
Selective Media
What is a specific selective medium used for the growth of Fungi?
Sabouraud's Dextrose Agar
What culture medium is used specifically for Corynebacterium diphtheriae?
Loeffler's Serum
Which culture medium is used for the selective growth of Neisseria?
Thayer-Martin Agar
What is the primary purpose of Enrichment Media?
To cultivate fastidious organisms or increase numbers of desired microbes to detectable levels
Which term refers to the complete destruction of all forms of microbial life, including endospores?
Sterilization
Which term refers to the destruction of vegetative pathogens on living tissue?
Antisepsis