Bacillus anthracis can cause infection via three different portals of entry. the id50 of cutaneous anthrax is 10 to 50 endospores, while inhalation anthrax requires 10,000 to 20,000 endospores, and gastrointestinal anthrax requires 250,000 to 1,000,000 endospores. which statement best describes a conclusion that can be drawn based on this information?

-Exposure to a small number of endospores (fewer than 1000) is most likely to result in gastrointestinal anthrax.

-Cutaneous anthrax is rarely observed when cases across the population are monitored

-The portal of exit impacts the infectious dose needed to cause infection at the portal of entry.

-Equal numbers of cutaneous, inhalation, and gastrointestinal anthrax infections are observed in human hosts.

-It is significantly easier to be infected with cutaneous anthrax as compared to other forms of anthrax.

Explanation:

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you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

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