#Question id: 3786
#Section 3: Genetics, Cellular and Molecular Biology
E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?
#Question id: 3787
#Section 3: Genetics, Cellular and Molecular Biology
A biochemist isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. When she adds some DNA to the mixture, replication occurs, but each DNA molecule consists of a normal strand paired with numerous segments of DNA a few hundred nucleotides long. What has she probably left out of the mixture?
#Question id: 3788
#Section 3: Genetics, Cellular and Molecular Biology
The spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage?
#Question id: 3790
#Section 3: Genetics, Cellular and Molecular Biology
Semiconservative replication of DNA means that:
#Question id: 3791
#Section 3: Genetics, Cellular and Molecular Biology
In vitro systems used to study replication must include all of the following except:
#Question id: 3792
#Section 3: Genetics, Cellular and Molecular Biology
Strain introduced by unwinding DNA at the replication forks is relieved by