A patient has severe acne that has been refractory to treatment. The patient is taking tetracycline and using topical tretinoin (Retin-A) and has been applying benzoyl peroxide twice daily. The provider asks the nurse to teach this patient about isotretinoin (Accutane), which the patient will begin taking in a few weeks. The nurse will include which statement when teaching this patient about this drug?
a."Alcohol may be consumed in moderation when taking this drug."
b."Skin rash, headache, and hair loss are common with this drug."
c."Tetracycline must be discontinued before beginning the isotretinoin."
d."Two pregnancy tests are required before each monthly refill of your prescription."

The correct answer is option c. "Tetracycline must be discontinued before beginning the isotretinoin".

Explanation:

Isotretinoin is a medication used to treat cases of severe acne, having dramatic positive effects since the patients start the treatment. However, the use isotretinoin should be monitored by a doctor because it is hard to process and could cause renal side effects. In this case, the patient must discontinue its treatment with tetracycline before start using isotretinoin.

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.

credit: gradman555p98x9p

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halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).