Mcb 3020 Study guides, Class notes & Summaries

Microorganisms/Microbes -Small living organisms that can't be seen by the human eye - diverse in form/funtion - inhabit every EVR that supports life - many single celled, some form complex structures, some multicellular - live in microbial communities Microorganisms/Microbes - oldest form of life - major fraction of earth's biomass - surround plants and animals - affect human life (infectious diseases, food and water, soils, animal health, fuel)

Griffith would have isolated only live R cells from the mouse host. - Griffith's experiment demonstrated transformation because a mouse injected with live R and heat-killed S strains of Streptococcus pneumoniae resulted in death of the mouse and the isolation of live R as well as live S cells. Hypothesize as to the type of cells that Griffith would have observed if transformation had not occurred. Telomere - Which of the following is a region of DNA at the end of a linear chromosome? DNA ...

Explain the concept of growth in the context of microorganisms. - -An increase in the number of cells -Microbial cells have finite life span, species maintained by continuously thriving population. -Cell numbers and all components of the cells double every generation. Describe the process of binary fission. How do binary fission and budding cell division differ? - - Two cells that arise from one -Cell division following enlargement of a cell twice its minimum size. -Partition forms betwee...

Humoral immunity is mediated by antibodies Cellular immunity is mediated by T-cells Mechanical barriers 1) Skin 2) Mucous membranes 3) Tears 4) Respiratory tract Very few microorganisms penetrate skin True or False? True What do tears contain? Lysozymes What kind of epithelium covers respiratory tract? ciliated epithelium

Mcb 3020 Exam Questions With Verified Solutions A microbe is discovered living in an extreme environment near a deep sea vent. The microorganism lacks a nucleus and peptidoglycan in its cell wall, but it does have unusual membrane lipids. This species is most likely a member of the Domain - answerArchaea Disproves spontaneous generation - answerLouis Pasteur Generates the small pox vaccine - answerEdward Jenner Describes bacterial transformation - answerFredrick Griffith Determined the s...

The Gram stain can only be performed on cultures grown in liquid media. Group startsFalse Steps of Koch's Postulates1. disease always present in sick but not in well individuals 2. isolate microorganism from sick 3. infection with pure microbe into healthy individuals result in disease 4. re-isolate microorganisms form infected individuals The major site of cell membrane synthesis is the _________blank.endoplasmic reticulum

Carl Woese - Is known for dividing the prokaryotes into Bacteria and Archaea Domains, Is known for dividing the prokaryotes into Bacteria and Archaea Domains. Carolous Linnaeus - He developed a way to name and organize species that we still use today; Linnaean System. Ernst Haeckel - Proposed a 3rd biological kingdom; Protista. Roger Stanier - Proposes division into Higher and Lower Protista.

The phosphorylation of glucose to make glucose-6-phoshpate in glycolysis consumes ATP, and increases entropy. True or False? False -entropy decreases as order increases Two ways in which carbon can be acquired for biosynthesis include ___________ and ______________. A. Heterotrophy and autotrophy B. Chemotrophy and phototrophy C. Autotrophy and phototrophy D. Lithotrophy and autotrophy A. Heterotrophy and autotrophy -chemo and photo refer to energy tropism ...

A microbe is discovered living in an extreme environment near a deep sea vent. The microorganism lacks a nucleus and peptidoglycan in its cell wall, but it does have unusual membrane lipids. This species is most likely a member of the Domain - Archaea Disproves spontaneous generation - Louis Pasteur Generates the small pox vaccine - Edward Jenner Describes bacterial transformation - Fredrick Griffith Determined the source of a cholera outbreak - John Snow Incorrect statement about Koch...

MCB3020 Final Exam Questions And Answers (Verified And Updated) The Gram stain can only be performed on cultures grown in liquid media. Group starts - answerFalse Steps of Koch's Postulates - answer1. disease always present in sick but not in well individuals 2. isolate microorganism from sick 3. infection with pure microbe into healthy individuals result in disease 4. re-isolate microorganisms form infected individuals The major site of cell membrane synthesis is the _________blank. -...