Answer: 20%.
- A 30%
- B 20%
- C 10%
- D 40%
Correct answer: B. 20%
Explanation: Chargaff's rule: A=T and G=C. If A=30%, then T=30%. Remaining 40% is split equally between G and C. So G=20%.
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.