Depurination of purine bases results in an apurinic site. assume a single depurination event occurs in the gc base pair of the sequence below and is not repaired. then, if two rounds of replication occur, which of the following dna sequences will exist after two rounds of replication? remember that when dna polymerases encounter an apurinic site, most often an a is incorporated into the newly synthesized strand. assume this is true for the sequence below.





select one or more:



















which repair mechanism(s) involve(s) the removal of a single nucleotide?

select one or more:

base excision repair

proofreading repair

mismatch repair

nucleotide excision repair

an alteration in the dna from an at base pair to a ta base pair is called a

select one:

transversion

transition

which of the following mutations does not lead to a change in the amino acid sequence of the gene product?

select one:

silent

loss of function

missense

neutral

nonsense