Answer: Tertiary and quaternary.
- A Primary mainly
- B Secondary mainly
- C Tertiary and quaternary
- D Primary and secondary
Correct answer: C. Tertiary and quaternary
Explanation: Tertiary structure involves interactions between R groups (hydrophobic, ionic, H bonds, disulfide bonds) in a single polypeptide. Quaternary involves interactions between multiple polypeptide subunits.
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.