Biochemistry usmle Study guides, Class notes & Summaries

Biochemistry USMLE Step 1 Questions and Answers 2024.

Achondroplasia involves what defect? (Ans- Cell-signaling defect of fibroblast growth factor (FGF) receptor 3 Marfan's syndrome involves a mutation in what? (Ans- Fibrillin gene Nucleoside + phosphate= ? (Ans- Nucleotide Adenine and Guanine are in what type of nucleic acid? (Ans- Purines Cytosine, Uracil and Thyamine arein what kind of nucleic acid? (Ans- Pyrimidines Xanthine, hypoxanthine and uric acid are all what type of base? (Ans- Purine How many hydrogen bond...

Biochemistry USMLE step 1 Questions and Answers with Verified Solutions (New Update 2023) Biochemistry USMLE step 1 Questions and Answers with Verified Solutions (New Update 2023)

Biochemistry USMLE Practice 2022 Questions and Answers thrombocytopenia Ans- deficiency of platelets in the blood. This causes bleeding into the tissues, bruising, and slow blood clotting after injury. A 16 year old boy presented to a doctor by his mother for the injury which he had recently during cycle riding. On examination doctor noticed the loose, overly-flexible joints, smooth or stretchy, easily-bruised skin and abnormal wound healing and scar formation. This is the characteri...

BIOCHEMISTRY USMLE STEP 1 EXAM QUESTIONS WITH CORRECT ANSWERS

Biochemistry USMLE step 1 questions correctly 2023histones are rich in which 2 AA's lysine & argenine Barr bodies (what, type of chromatin) inactive X chromosomes heterochromatin (highly condensed, sterically inaccessible) less condensed, transcriptionally active, sterically accessible chromatin euchromatin DNA methylation at CpG islands represses transcription "CpG Methylation makes DNA Mute" DNA methylation (what is methylated and why?) template strand c...

QUESTIONS AND ANSWERS

1. Determine the number of ATP molecules, which are formed in Krebs cycle at the conversion of isocitric acid to fumaric acid (I) and to succinyl CoA (II) respectively: A) I -7,0; II - 5,5 B) I - 5; II - 3,5 C) I - 6,5; II - 4,5 D) I - 7,5; II - 5 E) I - 7; II - 3 2. In which stages of citric acid cycle is CO2 formed? 1) Izocitrate - α-Ketoglutarate 2) Succinate - Fumarate 3) α-Ketoglutarate -Succinil-CoA 4) Fumarate – Malate 5) Malate –Oxaloacetate A) 1,3 B) 2,4 C) 1,4 D) ...

Biochemistry USMLE Practice Questions and Answers thrombocytopenia - answerdeficiency of platelets in the blood. This causes bleeding into the tissues, bruising, and slow blood clotting after injury. A 16 year old boy presented to a doctor by his mother for the injury which he had recently during cycle riding. On examination doctor noticed the loose, overly- flexible joints, smooth or stretchy, easily-bruised skin and abnormal wound healing and scar formation. This is the characteristic f...

First Aid USMLE Step 1: Biochemistry | Questions and answers | 2024/25