Most cases of hookworm infection are acquired by ingestion of adult forms in contaminated food or water
Indicate whether the statement is true or false
FALSE
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What happens in the third step of the type I topoisomerase reaction?
A. The enzyme changes to the open conformation. B. The unbroken DNA strand passes through the break in the first strand. C. Active-site tyrosine acts as a nucleophile and attacks one strand to form an enzyme-linked intermediate. D. The enzyme changes to the closed form. E. The 3' OH of the broken strand attacks the link between the active site tyrosine and the 5' end of the broken strand, resulting in religation of the broken strand.
The rationale for including the plasmid that was not cloned with the linker was
A. the plasmid without the linker served as a positive control to demonstrate that the assay was performing as expected B. that the plasmid was used to make sure there was no RNA degradation C. the plasmid was used to make sure there was no DNA degradation D. the plasmid was included as a carrier to help separate the RNA that was produced from the unincorporated radioactive nucleotides. Bloom's Level:
Cross-sectional surveys are very useful in establishing cause of a disease
Indicate whether this statement is true or false.
If a mother already has a child with chromosomal abnormalities, the risk of having another child with
chromosomal abnormalities is 10 percent. Indicate whether the statement is true or false.