Comprehensive USMLE Biochemistry Mastery Package

Which serum marker is best measured in MI? a) first 8 hours b) 8–24 hours c) 2–7 days a) troponin b) CK–MB C) LDH–1 What is pleiotropy? A single gene mutation can have various phenotypic outcomes. E.g. RB gene#: retinoblastoma and osteosarcoma Where in the kidney can you find epith...

1. Q Which of the following descriptions characterizes the symport transporter? Select one: a. One molecule being moved in one direction. b. Two molecules moved through in opposite directions. c. Two molecules moved through in one direction. d. None of these A c. Two molecules moved through ...

Your patient is a 65-year-old man with progressive fatigue. His fatigue started -7 months ago, and it is worsening; sometimes, he feels "too tired even to get out of bed". Over the last month, he has started having bone pain, and he has stopped his usual evening walks because of a decreased ...

1 Q A patient presents with blue sclera that results in an inability to form procollagen from pro-α chains. What disease does he have? A Osteogenesis imperfecta 2 Q List the four main phases of mitosis in order. A Prophase, metaphase, anaphase, and telophase 3 Q When does mitosis occur i...

1 Q 2. Identify the metabolite that does NOT serve as a precursor of a dietarily essential amino acid: A. Alpha-ketoglutarate B. 3-phosphoglycerate C. Glutamate D. Aspartate E. Histamine A E. Histamine Histamine is a catabolite, not a precursor, of histidine. 2 Q 4. Select the CORRECT an...

1 Q The enzyme Aldehyde dehydrogenase carries out which of the following reactions? Select one: a. Oxidation of aldehyde to acid b. Reduction of aldehyde to alcohol A a. Oxidation of aldehyde to acid 2 Q Which of the following statements is False? Select one: a. Oxidases uses atmospheric...

1 Q P450 cytochromes are members of which family of oxidoreductase? A: Catalase B: Hydroperoxidase C: Oxidase D: Oxygenase A D: Oxygenase 2 Q Which of the following statements about the enzymes used in fructose metabolism is incorrect (or False)? A: Fructokinase phosphorylates Fructose f...

USMLE- BIOCHEMISTRY- EXAM 3 REVIEW | WITH 100% CORRECT ANSWERS | LATEST UPDATE | GRADED A+ 1 Q Which of the following statements about Purine and Pyrimidine biosynthesis and metabolism is correct (or True)? (Select all that apply) A: Antifolate drugs and Glutamine analogs block purine nucle...

1. Q Which of the following statements if false? Select one: a. Heme (or protophoryrin ring) is synthesized from Succinyl-CoA and Glyicine. b. 65% of the enzymes have His-Arg-Cys-Glu-Asp in the active site. c. Hemoglobin can be given as an example of a molecule that exhibits allosterism. d. Bo...

What gland is found in the muscular triangle of the neck? ANS- Thyroid gland Is an afferent or efferent pupillary defect described as B/L pupillary constriction when light is shined in the unaffected eye and B/L paradoxical dilation when light is shined in the affected eye? ANS- Afferent pupi...