Question

i am unsure of the answer for #2

e 1. An intermediate electron acceptor for oxidations that occur in both glycolysis and m cycle reactions (A) Cytochrome (B) FADH2 (C)NAD+ (D) NADP+ (E) Oxygen (02) 2.Coenzyme that transfers electrons from the Krebs cycle to the mitochondrial electron-transport chain at a lower energy level than that of electrons entering at the beginning the chain (A) Cytochrome (B) FADH2 (C) NAD+ (D) NADP+ (E) Oxygen (02) 3.During respiration, most ATP is formed as a direct result of the net movement of (A) potassium against a concentration gradient (B) protons down a concentration gradient oblectrons against a concentration gradient

Answer 1

i1.Anntermediate electron acceptor for oxidation that occur in both glycolysis and kreb cycle reactions NAD+.

NAD is giving it's reducing equivalents for glycolysis and kreb cycle

.glycolysis at glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate

Krebs cycle at three times, isocitrate to alpha keto glutamate, to succinyl coA, malate to oxaloacetate.

2.Coenzyme that transfer electrons from the Krebs cycle to the mitochondrial electron transport chain at a lower energy level than that of electrons entering at the beginning the chain FADH2.

Electrons from Krebs cycle are directly transferred to complex II of ETC to Q but via FAD to FADH2_