GCD Ch. 6 Exam Questions with Correct Answers

GCD Ch. 6 Exam Questions with Correct Answers The process of DNA replication requires that each of the parental DNA strands be used as a ___________________ to produce a duplicate of the opposing strand. A) catalyst B) competitor C) template D) copy - Answer-C) template DNA replication is considered semiconservative because ____________________________. A) after many rounds of DNA replication, the original DNA double helix is still intact B) each daughter DNA molecule consists of two new strands copied from the parent DNA molecule C) each daughter DNA molecule consists of one strand from the parent DNA molecule and one new strand D) new DNA strands must be copied from a DNA template - Answer-C) each daughter DNA molecule consists of one strand from the parent DNA molecule and one new strand The classic experiments conducted by Meselson and Stahl demonstrated that DNA replication is accomplished by employing a ________________ mechanism. A) continuous B) semiconservative C) dispersive D) conservative - Answer-B) semiconservative If the genome of the bacterium E. coli requires about 20 minutes to replicate itself, how can the genome of the fruit fly Drosophila be replicated in only 3 minutes? A) The Drosophila genome is smaller than the E. coli genome. B) Eucaryotic DNA polymerase synthesizes DNA at a much faster rate than procaryotic DNA polymerase. C) The nuclear membrane keeps the Drosophila DNA concentrated in one place in the cell, which increases the rate of polymerization. D) Drosophila DNA contains more origins of replication than E. coli DNA. - Answer-D) Drosophila DNA contains more origins of replication than E. coli DNA How does the total number of replication origins in bacterial cells compare with the number of origins in human cells? A) 1 versus 100 B) 5 versus 500 C) 10 versus 1000 D) 1 versus 10,000 - Answer-D) 1 versus 10,000