Exam (elaborations)
MLT microbiology Questions and Answers 100% Solved
- Course
- Institution
Exam of 7 pages for the course microbiology at microbiology (MLT microbiology)
[Show more]
Content preview
MLT microbiologyAutotrophs – answer organisms that produce organic compounds from carbon dioxide
as a carbon source, using either light or reaction of inorganic chemical compounds as a
source of energy
Phototrophs - answer autotrophs that use photosynthesis to feed
Chemolithotrophs - answer autotrophs that obtain energy by oxidation of inorganic
compounds
Heterotrophs - answerorganisms that requires organic substrates as a source of carbon
for growth and development
Fastidious - answer hard to grow, requires additional growth factors
Psychrophiles - answerbacteria that grow best at cold temperatures (optimal growth at
10°C to 20°C)
Mesophiles - answeran organism that grows best in moderate temperature neither hot
nor cold ( 25°C to 40°C)
Thermophiles - answerbacteria that grow best at high temperatures (optimal growth at
50°C - 60°C)
Obligate aerobes - answera microorganism that requires oxygen for growth
Obligate anaerobes - answera microorganism that can live and reproduce only in a strict
anaerobic environment (0% oxygen)
Facultative anaerobes - answera microorganism that does not require oxygen for
growth but will use oxygen and grow better if it is present
Capnophilic - answerterm used to describe microorganisms that require an increased
concentration of CO², usually between 5% and 10%
Microaerophilic - answermicroorganism that grows with reduced oxygen and increased
carbon dioxide
Minimal media - answera laboratory growth medium whose contents are simple and
completely defined; not usually used in the diagnostic microbiology laboratory
, Nutrient media - answerculture media that are complex and made of extracts of meat or
soybeans
Enriched media - answermedia that contains nutritional enhancement to allow growth of
fastidious microbes
Selective media - answermedia that support the growth of one type or one group of
microbes but not of another
Differential media - answermedia that allows grouping of microbes based on different
characteristics demonstrated on the medium
Transport media - answerliquid or semisolid medium meant to preserve and maintain
the integrity of the specimen for the period between specimen collection and laboratory
processing of the sample
Generation/doubling time - answerthe time required for a microbial population to double
in numbers
prokaryotic cell - answerA type of cell lacking a membrane-enclosed nucleus and
membrane-enclosed organelles; found only in the domains Bacteria and Archaea.
eukaryotic cell - answerA type of cell with a membrane-enclosed nucleus and
membrane-enclosed organelles. Examples of organisms with these cells are protists,
plants, fungi, and animals.
gram positive cell wall - answervery thick peptidoglycan layer; techoic acid, attaches to
peptidoglycan layer; lipoteichoic acid, attached to cell membrane
gram negative cell wall - answerinner layer: thin peptidoglycan layer
outer layer: outer membrane with LPS
periplasmic space, (space between outer membrane and inner membrane)
acid fast bacterial cell wall - answersimilar to gram-positive, the outer membrane or
envelope of the cell wall contains a waxy layer of glycolipids, mycolic acid retains stain
after an acid-alcohol decolorizer
bacterial capsules - answerA virulence factor that impedes phagocytosis and may
enhance adherence to tissues
bacterial slime layer - answergelatinous sheath; allows bacteria to stick to slick surfaces
and host tissue; inhibits phagocytosis
an easily removed, diffuse, unorganized layer of extracellular material that surrounds
bacteria cells composed of polysaccharides
bacterial appendage - answerIncludes flagella, pili/fimbriae
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller julianah420. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67096 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now