A patient presents with muscle weakness and severe lactic ac…

A patient presents with muscle weakness and severe lactic acidosis, a condition caused by excessive lactate buildup due to impaired cellular respiration. Lab tests reveal low ATP levels and high NADH accumulation in the mitochondria. Further analysis indicates that electrons from NADH are not effectively transferred to the first electron carrier in the electron transport chain, leading to impaired oxidative phosphorylation and increased reliance on anaerobic metabolism. Which electron carrier is affected, and what is the name of the enzyme responsible for this defect?

DNA and proteins interact through various types of bonds, al…

DNA and proteins interact through various types of bonds, allowing for dynamic regulatory mechanisms in the cell. These interactions are essential for transcription, replication, and DNA repair. What types of bonds primarily mediate DNA-protein interactions while maintaining DNA structure?