In trying to determine whether DNA or protein is the genetic material, Hershey and Chase made use of which of the facts? A) DNA contains sulfur, whereas protein does not. B) DNA contains phosphorus, whereas protein does not. C) DNA contains nitrogen, whereas protein does not. D) DNA contains purines, whereas protein includes pyrimidines. E) RNA includes ribose, whereas DNA includes deoxyribose sugars. 2. Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine? A) 89% B) 16% C) 31% D) 42% E) It cannot be determined from the information provided. It became apparent to Watson and Crick after completion of their model that the DNA molecule could carry a vast amount of hereditary information in which of the following? A) sequence of bases B) phosphate-sugar backbones C) complementary pairing of bases D) side groups of nitrogenous bases E) different five-carbon sugars what is meant by the description “antiparallel” regarding the strands that make up DNA? A) The twisting nature of DNA creates nonparallel strands. B) The 5 to direction of one strand runs counter to the 5 to 3′ direction of the other strand. C) Base pairings create unequal spacing between the two DNA strands. One strand is positively charged and the other is negatively charged. 5. An Okazaki fragment has which of the following arrangements? A) primase, polymerase, ligase B) 3′ RNA nucleotides, DNA nucleotides 5′ C) 5′ RNA nucleotides, DNA nucleotides 3 D DNA polymerase L DNA polymerase III E) 5′ DNA to 3′ which enzyme catalyzes the elongation of a DNA strand in the 5′ 3′ direction? A) primase B) DNA ligase C) DNA polymerase III D) topoisomerase E) helicase