TLS Online TPP Program

#Question id: 422


The flow of material through a reaction pathway usually depends on ________.

#Life Sciences
  1. control at several steps in the pathway

  2. control of the first step of the pathway

  3. covalent modification of the enzyme that catalyzes the reaction

  4. feed-forward activation

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TLS Online TPP Program

#Question id: 2073

#Biochemistry

The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane—more acidic outside the cell than inside the cell. In this bacterial cell, phosphate transport is an example of:

TLS Online TPP Program

#Question id: 2073

#Zoology

The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane—more acidic outside the cell than inside the cell. In this bacterial cell, phosphate transport is an example of:

TLS Online TPP Program

#Question id: 2074

#Biochemistry

In some cells, there are many ion electrochemical gradients across the plasma membrane even though there are usually only one or two proton pumps present in the membrane. The gradients of the other ions are most likely accounted for by:

TLS Online TPP Program

#Question id: 2074

#Zoology

In some cells, there are many ion electrochemical gradients across the plasma membrane even though there are usually only one or two proton pumps present in the membrane. The gradients of the other ions are most likely accounted for by:

TLS Online TPP Program

#Question id: 2075

#Biochemistry

The force driving simple diffusion is:

TLS Online TPP Program

#Question id: 2075

#Zoology

The force driving simple diffusion is: