11. A 48-year-old patient is brought to the emergency room after exposure to toxic fumes suspected to contain cyanide. He presents with shortness of breath, confusion, and metabolic acidosis. The medical team suspects cyanide toxicity, which disrupts the electron transport chain (ETC). Which of the following statements concerning the components of the electron transport chain […]
1. A 60-year-old man is admitted to the hospital with confusion, fatigue, and muscle weakness. His symptoms suggest mitochondrial dysfunction, potentially caused by exposure to a toxin that inhibits the electron transport chain. Laboratory tests reveal a disruption in ATP production, and the medical team suspects inhibition at Complex I. Which of the following is
Q.- Adenosine triphosphate (ATP) is the energy currency within the cell. Which of the following best describes the type of compound ATP is? A. Phospholipid B. Amino acid C. Nucleotide D. Triacylglycerol E. Oligosaccharide. Details The correct answer is -C- Nucleotide. The nucleotide coenzyme adenosine triphosphate (ATP) is the most important form of chemical energy
ATP- The energy currency within the cell Read More »
Q.1-Out of the following respiratory chain components indicate which one is a mobile carriers of electrons? a) Cytochrome oxidase b) NADH-Q reductase c) Ubiquinone d) Succinate dehydrogenase Q.2-Choose the incorrect statement about redox
Biological Oxidation-Multiple-choice questions- (part-1) Read More »
1. Dehydrogenases catalyze the transfer of hydrogen from one substrate to another in a coupled oxidation-reduction reaction.These dehydrogenases are specific for their substrates but often utilize common coenzymes or hydrogen carriers, e.g. NAD+. Which out of the following is not niacin ( NAD+) dependent dehydrogenase? a) Pyruvate dehydrogenase b) Glycerol-3-P dehydrogenase( Mitochondrial ) c) Glyceraldehyde-3-P
Biological oxidation and Electron Transport Chain (Mcqs) – part-2 Read More »
Q.1- Choose a site along the electron transport chain out of the following that is not coupled to ATP synthesis: a) NADH- coenzyme Q (CoQ) reductase b) Succinate-Co Q reductase c) Cytochrome bc1 reductase d) Cytochrome oxidase e) None of the above. Q.2- Choose a statement out of the following that best describes the uncouplers
Q.1- All of the following except one are NAD+ requiring enzymes – A. Acyl co A dehydrogenase B. Glyceraldehyde-3-P dehydrogenase C. Pyruvate dehydrogenase complex D. Malate dehydrogenase E. Lactate dehydrogenase Q.2- Which one of the following enzymes catalyzes substrate-level phosphorylation in the TCA cycle A. Malate dehydrogenase B. Succinate Thiokinase C. Succinate dehydrogenase D. Alpha
Electron transport chain and oxidative phosphorylation- Mcqs (set-1) Read More »
Q.1- If the mitochondria were blocked at the site of NADH oxidation and were treated with succinate as substrate, what would the P: O ratio is? A. Zero B. One less than normally produced by succinate C. Same as that normally produced by succinate D. One more than normally produced by succinate E. Higher than
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