Answer: NADP+ is mainly used in anabolic reactions while NAD+ is in catabolic reactions.
- A NAD+ functions mainly within the nucleus during DNA repair reactions overall
- B NADP+ is mainly used in anabolic reactions while NAD+ is in catabolic reactions
- C NAD+ carries two additional electrons per molecule compared to NADP+
- D NADP+ is confined largely to the mitochondrial matrix compartment
Correct answer: B. NADP+ is mainly used in anabolic reactions while NAD+ is in catabolic reactions
Explanation: NAD+ accepts electrons in catabolic reactions (glycolysis, Krebs cycle). NADPH (reduced NADP+) is mainly used in anabolic reactions like fatty acid synthesis and in the pentose phosphate pathway.
As substrate concentration rises, reaction rate increases steeply at first, then plateaus at Vmax once every enzyme molecule is working at full capacity; Km is the substrate concentration giving half-maximal rate, and a LOWER Km means the enzyme reaches that rate with less substrate (higher affinity).
Concept context
Carbohydrates, proteins, lipids, nucleic acids, and enzyme kinetics. Essential foundation for understanding metabolism.