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
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
举一反三
- Which mode of transportation changes the structure of the material when the transported material enters the cell ? （ ） A: intitiative transpor B: simple diffusion C: facilitated diffusion D: gene translocation
- Solute movement by active transport can be distinguished from solute transport by equilibrating carrier mediated transport because active transport A: Is saturable at high solute concentration B: Is saturable at low solute concentration C: Is inhibited by other molecules with structures similar to that of the solute D: Moves the solute against its electrochemical gradient E: Allows movement of polar molecules
- Km is defined as A: Substrate concentration at maximum velocity B: Substrate concentration at half the maximum velocity C: Enzyme concentration D: Optimum temperature
- Which of the following sequences shows the proper ranking of foods from low to high protein quality ?
- There is a need for greater concentration ____ environmental issues