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TLS Online TPP Program

#Question id: 563

Both water and glucose share an —OH that can serve as a substrate for a reaction with the terminal phosphate of ATP catalyzed by hexokinase.  Glucose, however, is about a million times more reactive as a substrate than water.  The best explanation is that:

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. glucose has more —OH groups per molecule than does water.

  2. the larger glucose binds better to the enzyme; it induces a conformational change in hexokinase that brings active-site amino acids into position for catalysis.

  3. the —OH group of water is attached to an inhibitory H atom, while the glucose —OH group is attached to C.

  4. water and the second substrate, ATP, compete for the active site resulting in a competitive inhibition of the enzyme.

More Questions
TLS Online TPP Program

#Question id: 2805

#Unit 2. Cellular Organization

There is a roughly inverse correlation between organism complexity and gene density
TLS Online TPP Program

#Question id: 4550

#Unit 3. Fundamental Processes

Which one of the following factor of Holoenzyme assists the RNA polymerase in separating the DNA strands at the transcription start site?
TLS Online TPP Program

#Question id: 2003

#Unit 4. Cell Communication and Cell Signaling

The number of MHC protein combinations possible in a given population is enormous. However, an individual in that population has only a couple of MHC possibilities. Why?
TLS Online TPP Program

#Question id: 1037

#Unit 4. Cell Communication and Cell Signaling

In a rapidly multiplying bacterial population, cell numbers increase
TLS Online TPP Program

#Question id: 18862

#Unit 13. Methods in Biology

What is the shortest distance that the eye must go to concentrate on any object?