Biology, 05.02.2020 00:56 issagirl05
In his work with pneumonia-causing bacteria and mice, griffith found that the protein coat from pathogenic cells was able to transform nonpathogenic cells. heat-killed pathogenic cells caused pneumonia. some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic. the polysaccharide coat of bacteria caused pneumonia. what is the basis for the difference in how the leading and lagging strands of dna molecules are synthesized? dna polymerase can join new nucleotides only to the 3′ end of a preexisting strand. helicases and single-strand binding proteins work at the 5′ end. the origins of replication occur only at the 5′ end. dna ligase works only in the 3′ → 5′ direction. in analyzing the number of different bases in a dna sample, which result would be consistent with the base-pairing rules? a = g a + g = c + t a + t = g + c a = c the elongation of the leading strand during dna synthesis progresses away from the replication fork. occurs in the 3′ → 5′ direction. produces okazaki fragments. depends on the action of dna polymerase. in a nucleosome, the dna is wrapped around polymerase molecules. ribosomes. histones. a thymine dimer. which of the following sequences in double-stranded dna is most likely to be recognized as a cutting site for a restriction enzyme?
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In his work with pneumonia-causing bacteria and mice, griffith found that the protein coat from path...
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