Km is defined as
A: Substrate concentration at maximum velocity
B: Substrate concentration at half the maximum velocity
C: Enzyme concentration
D: Optimum temperature
A: Substrate concentration at maximum velocity
B: Substrate concentration at half the maximum velocity
C: Enzyme concentration
D: Optimum temperature
举一反三
- The most relevant measurement in single dose bioavailability studies is A: maximum drug serum concentration B: time to maximum serum concentration C: area under serum concentration –time curve (AUC) D: time for peak drug concentration to fall to half E: time to appearance of drug in circulation (lag time)
- Which of the following options is not a feature of active transportation?( ) A: Need the assistance of substrate specific carrier protein on cell membrane B: Nutrients are transported from high concentration to low concentration C: The molecular structure of the transported substance does not change D: Need ATP
- In general, a small KM indicates that a substrate binds very tightly to the enzyme, and a large KM indicates weak binding.
- The amount-of-substance concentration may be referred to as the concentration for short.
- The main difference between interstitial fluid and plasma is A: The protein concentration is higher in plasma B: The Na+ concentration is higher in plasma C: The protein concentration is higher in interstitial fluid D: The Na+ concentration is higher in interstitial fluid E: The organic acid concentration is higher in plasma