Chemicals that bind to DNA by intercalating between

Chemicals that bind to DNA by intercalating between the bases
A.  can cause frame shift mutations
B.  can cause deletion mutations
C.  can cause insertion mutations
D.  are generally planar hydrophobic molecules
E.  all of the above


The purpose of the short RNA chains which are synthesized during DNA replication is to:
A.  code for genes necessary for replication.
B.  provide a primer for DNA synthesis.
C.  maintain DNA strands in an open (i.e., not base-paired) from so that polymerases can recognize the template strand.
D.  reduce superhelical density.
E.  provide a template for ligation of Okazaki fragments.


Uracil is occasionally incorporated into DNA during replication. Why is it subsequently removed?
A.  The presence of uracil would interfere with parental strand recognition.
B.  Uracil is unstable and would cause mutations if left in the DNA.
C.  Uracil makes the same hydrogen bonds as thymine so it might be confused with thymine.
D.  Cytosine is unstable and occasionally converts to uracil.