Biochemistry USMLE

Biochemistry USMLE practice questions thrombocytopenia - 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 characteristic feature of the disord...

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) ...