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Unit 2: Earth Systems Exam Questions With Verified Answers.

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includes rocks and minerals? - answergeosphere Groundwater is included in what sphere? - answerhydrosphere Gases make up what sphere? - answerAtmosphere Biosphere - answeris all of the living organisms and environments in which they live What is the main source of energy for ALL living things? - answersun Lithosphere - answeris the solid earth - including its soil, rocks, and mantle Trees are part of what sphere? - answerBiosphere Cryosphere - answeris the frozen water in snow, ice, and g...

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Unit 8: Evolution Exam Study Guide With Verified Solutions.

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Unit 8: Evolution Exam Study Guide With Verified Solutions. Scientific theory - answera well-supported explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation species - answerin biology, evolution is a change in _________________ over time artificial selection - answermany organisms, possibly including our beloved pets, were produced through this process fitness - answerthe ...

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USLME Exam Package Deal With Verified Solutions.

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USLME Exam Package Deal With Verified Solutions.

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USLME Biochem - First Aid Exam Questions With Accurate Answers.

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USLME Biochem - First Aid Exam Questions With Accurate Answers. Chromatin structure - answerDNA exists in condensed chromatin form in order to fit in nucleus Negatively charged DNA loops twice around positively charged histone octamer (2 sets of H2A, H2B, H3 and H4) to form nucleosome "bead" Octomer subunits consist primarily of lysine and arginine amino acids (positively charged). H1 ties nucleosome beads together in a string Heterochromatin - answerCondensed, transciptionally inactiv...

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USLME Step 1 Cases – Biochemistry Exam Questions With Accurate Answers.

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USLME Step 1 Cases – Biochemistry Exam Questions With Accurate Answers. Alkaptonuria --------------- tyrosine - answer____ is characterized by the absence of *homogentisate oxidase*, and enzyme in the ____ degradation pathway that catalyzes the conversion of homogentisate to maleylacetoacetate. arthritis --------- sclerae - answerIn alkaptonuria, the accumulation of homogentisate in cartilage leads to ____ and causes discoloration of ____ and other body tissues. Homogentisate is a ...

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USLME – Biochemistry Exam Questions With Accurate Answers.

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USLME – Biochemistry Exam Questions With Accurate Answers. Amino acids necessary for purine synthesis - answerGlycine Aspartate Glutamine Leflunomide MOA - answerinhibits dihydroorotate dehydrogenase 5-fluorouracil and capecitabine (its prodrug) MOA - answerForm 5-F-dUMP which inhibits thymidylate synthase (therefore decreasing dTMP) Adenosine deaminase deficiency (Pathogenesis, presentation) - answerADA needed for degradation of adenosine Deficiency causes: excess ATP and dATP --&gt...

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USLME Exam Questions With Accurate Answers.

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USLME Exam Questions With Accurate Answers. Causes of QT prolongation - answerMeds Macrolides/Quinolones Azoles Antiemetics Antipsychotics Methadone/Oxy Class Ia/III antiarrythmics Electrolyte -low Mg -low K -low Ca Empyema drainage - answerfibrinolytic agent (tPA) + DNase to dissolve fibrin and improve chest drainage Whipple disease + biopsy findings - answergram pos rod bacteria causes malabsorption and arthralgia biopsy - foamy macrophages and positive period-acid Schiff stai...

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Cardiovascular system USLME (MCQs) Exam Questions With Accurate Answers.

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Cardiovascular system USLME (MCQs) Exam Questions With Accurate Answers. 1. A physician decides to place a patient on a calcium channel blocker for treatment of her an- gina. Calcium channel blockers can relax the smooth muscle of blood vessels and can also have various effects on cardiac contractility, conduction, and heart rate. Which of the fol- lowing calcium channel blockers would be most effective in reducing heart rate and con- tractility? (A) Dihydropyridine (B) Diltiazem (C) Ni...

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USLME - Biochemistry (General Questions) Exam Questions With Accurate Answers.

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USLME - Biochemistry (General Questions) Exam Questions With Accurate Answers. Histones are rich in what AAs? - answerLysine and arginine (both + charge) When does histone synthesis occur? - answerS phase (along with DNA getting synthesized) Heterochromatin is _________, euchromatin is _________ - answerInactive/condensed; active/accessible What allows mismatch repair enzymes to distinguish between old and new DNA strands in prokaryotes? - answerMethylation; old/template strands are meth...

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Microbiology MCQs (USLME) Exam Questions With Accurate Answers.

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Microbiology MCQs (USLME) Exam Questions With Accurate Answers. 1. A 30-year-old sexually active woman presents with a painful vesicle on her external genitalia and bilateral inguinal lymphadenopathy. A Tzanck smear from the vesicle fails is negative, and polymerase chain reaction analysis of viral DNA is negative. A VDRL assay is also negative. Which of the following medications would be most helpful to this patient? (A) Acyclovir (B) Ceftriaxone (C) Foscarnet (D) Ribavirin (E) Vancom...

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