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Describe the process of defining that an infective agent causes a disease as defined by Koch’s
postulates and give FOUR (4) reasons as to why Koch’s postulate being too restrictive?

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Casey Durgan
Casey DurganLv2
11 Jul 2019

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Related questions

TRUE/FALSE:

01. ____ Koch’s postulates can befulfilled by all known bacterial pathogens with no limitations.

02. _____ The expression of virulencefactors, like adhesion molecules, can influence the speciesspecificity and tissue tropism of the bacterial pathogen.

03. __ Non-specific adherence ofbacterial pathogens mediates strong attachment to host cells andtissues through adhesins.

04. __ Invasins are proteins that havelocal effects on host tissues and cells and promote spread of thebacterial pathogen.

05. __ Pathogenic bacteria havedeveloped a sophisticated method to directly inject bacterialproteins into target host cells called the Type III secretionsystem (T3SS).

06. __ It is not necessaryfor the eukaryotic host cell to express (transcriptionally ortranslationally) the receptor for bacterial adhesins.

07. __ The specific binding between antibody andantigen forms the basis of many important assays andtechniques.

08. __ Monoclonal antibodies areantibodies produced by a single clone of B cells, so that they areall identical and recognize the same epitope of an antigen.

4) Which of the following CAN be multicellular? (CIRCLE ALL THAT APPLY)

A. bacteria

B. archaea

C. fungi

D. helminths

E. protozoa

7) Robert Koch was a German biologist that formulated Koch’s postulates. Why was this important?

A. It outlined the existence of heat-resistant spores.

B. It developed a way science can link a disease to a causative microbe.

C. It developed guidelines for doctors to disinfect their hands before surgery.

D. It made microscopes powerful enough to see microbes.

E. It instructed dairy farmers on the process of pasteurization.

8) Carbohydrates are the most common macromolecule in the average cell. They also are a component of DNA and RNA.

A. Both statements are true.

B. Both statements are false.

C. The first statement is true, the second is false.

D. The first statement is false, the second is true.

11) The different kinds of amino acids are differentiated by their carboxyl groups. The sequence of the amino acids in a protein is called the primary structure.

A. Both statements are true.

B. Both statements are false.

C. The first statement is true, the second is false.

D. The first statement is false, the second is true.

1.Suppose you were able to clone a whole flock of sheep from a single somatic ancestral cell. Would you expect these clones to show any phenotypic variability? Why or why not?
2. State the four Darwin’s postulates and identify how each postulate differs for artificial and natural selection.
3.Both genetic drift and inbreeding are expected to cause an increase in homozygotes in a population, but by different mechanisms. What is the key difference?
4. What is the effect of genetic drift on heterozygosity in a population of constant size? How does this effect relate to population size?

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