Practice Questions

TLS Online TPP Program

#Question id: 548

Which one of the following statements is true of enzyme catalysts?

#Unit 1. Molecules and their Interaction Relevant to Biology

Their catalytic activity is independent of pH.
They are generally equally active on D and L isomers of a given substrate.
They can increase the equilibrium constant for a given reaction by a thousand fold or more.
They can increase the reaction rate for a given reaction by a thousand fold or more.

More Questions

TLS Online TPP Program

#Question id: 2069

#Unit 2. Cellular Organization

Which of the following processes includes all of the others?

TLS Online TPP Program

#Question id: 2070

#Unit 2. Cellular Organization

The sodium-potassium pump is called an electrogenic pump because it:

TLS Online TPP Program

#Question id: 2071

#Unit 2. Cellular Organization

Diffusion of ions across membranes through specific ion channels is driven by:

TLS Online TPP Program

#Question id: 2072

#Unit 2. Cellular Organization

Which of the following structures would decrease the electrochemical gradient across a membrane?

TLS Online TPP Program

#Question id: 2075

#Unit 2. Cellular Organization

The force driving simple diffusion is:

TLS Online TPP Program

#Question id: 2076

#Unit 2. Cellular Organization

An organism with a cell wall would most likely be unable to take in materials through: