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High Yield COMLEX Level 1 Genetic Diseases Questions And Answers Latest Update!! $15.49
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High Yield COMLEX Level 1 Genetic Diseases Questions And Answers Latest Update!!

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The COMLEX-USA (Comprehensive Osteopathic Medical Licensing Examination of the United States) is a series of standardized medical board exams designed for osteopathic medical students and physicians. Administered by the National Board of Osteopathic Medical Examiners (NBOME), it evaluates candidate...

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  • 23 de enero de 2025
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HIGH YIELD COMLEX LEVEL 1 GENETIC
DISEASES QUESTIONS AND ANSWERS LATEST
UPDATE!!



Lactose intolerance - Answers lactase deficiency



sx: flatulence, abdominal cramping, diarrhea



caused by deficiency in lactase, usually not congenital



LCT active in children, downregulated by MCM6 in adults



mutation in MCM6= can process lactose as an adult



tx: avoid dairy, lactaid



IRDS (infant respiratory distress syndrome) - Answers labs: low
lecithin/sphingomyelin ratio (<1.5)



problem: inability to inflate lungs, alveolar collapse, infant mortality

, Q&A



infants= deficienct in lung surfactant= premies, 1% of babies, but 20% of
deaths



tx: surfactant replacement, ventilation



Creutzfeldt-Jakob disease (CJD) - Answers degenerative disease in
the CNS, brain becomes riddled with holes



sx: psychiatric problems, behavior changes, pain



life expectancy after sx develop= 13+ months



PrP-C protein involved in the myelination and stem cell renewal, terminal
C-region of 40% alpha-helices, no beta-pleated sheets



PrP-Sc= misfolded, C-region becomes one long beta-pleated sheet



PrP-Sc corrupts PrP-C when touching it, leads to protein aggregation and
neuronal cell death



Lesch-Nyhan syndrome - Answers X-linked recessive (1380,000)



neuro+ behavioral changes (biting/head banging)

, Q&A



overproduce uric acid= gout/kidney stones



Caused by a defect in the HPRT1 gene encoding hypoxanthine-guanine
phopshoribosyltransferase1, an enzyme responsible for recycling purines
as well as making DNA and RNA.



Prader-Willi Syndrome (PWS) - Answers epigenetics



hypotonin, short stature, hypogonadism, intellectual disability, chronic
hunger



1/15,000



Caused by the deletion or silencing of up to 7 genes on the paternal
chromosome 15, combined imprinting defects on the maternal
chromosome. Some of these genes which are not expressed include
SNORD 116 and SNRPN which regulate alternative mRNA splicing. Their
deletion leads to an increase in production of ghrelin mRNA, causing
chronic hunger.



Bloom Syndrome - Answers AR inheritance of Ch15 causing DNA
fragility

Feats:

- short stature

- telangiectatic erythema of the face (improves with age)

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