Tutor profile: Chao Z.
Subject: Environmental Science
The Mohs hardness scale measures:
the ability of harder material to scratch softer materials, thereby characterizing scratch resistance.
The stop codons for mRNA are UAG, UAA, and UGA. What are the corresponding codons for DNA?
The corresponding condons for DNA are TAG, TAA, and TGA. In DNA, Uracil is replaced by Thymine at the corresponding base pair.
Subject: Dentistry and Pre-Dentistry
A patient presents with tooth pain. Upon clinical examination, tooth #19 shows a large carious lesion encroaching on pulp. There is no swelling. Radiographic examination shows a periapical radiolucency. #19 showed no response to cold, and exaggerated response to percussion and palpation. What are the pulpal and periapical diagnoses for #19?
Since #19 is negative to cold, the nerve has died and hence, the pulpal diagnosis is pulp necrosis Due to presence of a periapical radioluency as well as exaggerated response to percussion and palpation, the periapical diagnosis is symptomatic apical periodontitis.
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