Which of the following statements is true regarding porphyrias?
A) They are a group of inherited and acquired disorders of heme biosynthesis caused by deficiencies of specific enzymes in the biosynthetic pathway.
B) They are a group of inherited and acquired disorders of glucose biosynthesis caused by deficiencies of specific enzymes in the biosynthetic pathway.
C) They are a group of non-genetically related disorders of heme biosynthesis caused by deficiencies of specific enzymes in the biosynthetic pathway.
D) They are a group of inherited and acquired disorders of cholesterol biosynthesis caused by deficiencies of specific enzymes in the biosynthetic pathway.
Question 2
Dermatophyte test medium can help presumptively identify dermatophytes, such as Trichophyton spp., because
A) antibiotics present will only allow dermatophytes to grow.
B) it promotes the characteristic morphology of the organisms.
C) it will turn from yellow to red with growth.
D) the addition of ammonium hydroxide prevents growth of other organisms.
The heme group
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