DNA Replication

A culture medium starts with 10 strands of DNA. How many strands of DNA would be present after two rounds of replication?

A strand of DNA undergoes one round of replication how many of the strands will contain at least one original strand of DNA?

A single strand of DNA undergoes 2 rounds of replication. What percentage of strands will contain one of the original two strands of DNA?

Scientists synthesized DNA with nucleotides that contain a fluorescent tag that glows green under UV light. Scientists then transferred this DNA to a solution containing untagged nucleotides and all enzymes required for replication.  What fraction of strands will still fluoresce after 4 rounds of replication in the new solution?

A single strand of DNA undergoes three rounds of replication. What fraction of the DNA WON’T contain one of the two original strands of DNA?

Mitochondrial DNA (mtDNA) is found within the mitochondria of eukaryotic cells. Although mtDNA is circular it shares a similar replicative process to chromosomal DNA. Given this which of the following is required for mtDNA to keep its double stranded DNA separated during replication?

Werner Syndrome is a rare autosomal recessive disorder that causes loss of RecQ helicase function. RecQ is a special helicase that is active during the repair of double-stranded DNA crosslinks. Which part of double-stranded DNA crosslink repair is likely lost in Werner Syndrome?

DNA ligase 4 deficiency results in unusual facial features, immune dysfunction,  and developmental delay among other morphological and physiological abnormalities. These deficiencies are thought to arise from an inability to:

Scientists incorporated a fluorescent tag that binds to at an origin of replication with two cell cultures. They triggered replication in the cells by inducing the S-phase and observed the number of distinct fluorescent sites within the DNA of both cultures. Culture A had a single fluorescent site while culture B had multiple fluorescent sites. This suggests that:

Which of the following enzymes wouldn’t be found in a bacteria (which is a prokaryote)?