Zaymiey

🔬 Biology  ·  Biomolecules  ·  NEET

What distinguishes NAD+ from NADP+ functionally?

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.

Enzyme Kinetics: Rate vs Substrate Concentration[Substrate]Reaction rateVmaxKm½VmaxCurve flattens at high [S]: ALL enzyme active sites are occupied (saturation)

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.

Read the full Biomolecules notes →