During the negative feedback regulation of isoleucine production from threonine, ___(1)___ binds onto the enzyme ___(2)___ to ___(3)___ production of isoleucine.

The number of turns of one DNA strand over another is its

Binding of O2 to one subunit of hemoglobin causes the other O2 binding sites of that hemoglobin protein to increase their affinity for more O2 to bind.  This is known as:

Which of the following is FALSE regarding a reaction at equilibrium?

How many markers are needed on a 60 mbp human chromosome to map new traits?

Hydrophobic amino acids contribute to protein folding by

Who proposed the semiconservative model of DNA replication?

Which of the following statements about adenosine triphosphate is TRUE?

Which of the following domains bind proline-rich sequences?

Until recently, biologists viewed the Golgi apparatus as a static structure.  However, several labs has provided evidence for the Golgi behaving in a dynamic manner.  The new model for Golgi function is the cisternal maturation model.  How does this model differ from the vesicular transport model?