Which model allows for hybrid states of allosteric enzymes, and why is this significant?

• A. The sequential model allows for hybrid states, which is significant because it explains varying cooperativity.
• B. The concerted model allows for hybrid states, which is significant because it explains varying cooperativity.
• C. Neither model allows for hybrid states, which is significant for explaining enzyme kinetics.
• D. Both models allow for hybrid states, which is significant for explaining enzyme kinetics.

Answer: (A)