The large DNA molecules in human chromosomes take more time to replicate than the smaller, circular bacterial chromosomes. If a 1,000- kilobase (kb) fragment of DNA has 10 evenly spaced and symmetric replication origins, and DNA polymerase moves at 1 kb per second, how many seconds will it take to produce two daughter molecules? (Ignore potential problems at the ends of this linear piece of DNA.) Assume that the 10 origins are evenly spaced from each other but not from the ends of the chromosome.