AP Unit 6 Advanced Exam Questions Correctly Answered 2024.

AP Unit 6 Advanced Exam Questions Correctly Answered 2024. Scientists conducted a transformation experiment using E. coli bacteria and the pTru plasmid. Samples of the pTru plasmid (lane A) and the chromosomal DNA from two different E. coli strains that the scientists attempted to transform (lane B and lane C) were compared using gel electrophoresis. The results are shown in Figure 1. - CORRECT ANSWER Which of the following statements best explains the experimental results observed in Figure 1 ? - CORRECT ANSWER E. coli in lane CC have been successfully transformed and contain additional genetic information. A successful transformation would contain a band of DNADNA from the pTrupTru plasmid and a band of DNADNA from the E. coli chromosome. Lane CC has both bands correctly identified and is experimental evidence of a successful bacteria transformation of E. coli with the pTrupTru plasmid. Which of the following best explains how the pattern of DNA arrangement in chromosomes could be used, in most cases, to determine if an organism was a prokaryote or a eukaryote? - CORRECT ANSWER *Prokaryotic DNADNA ^Eukaryotic DNADNA *Single circular chromosome ^Multiple linear chromosomes This describes the typical arrangement of chromosomes: prokaryotes have DNADNA arranged in a single circular chromosome and eukaryotes have DNADNA arranged in multiple linear chromosomes. Lynch syndrome is an inherited condition associated with an increased risk for colon cancer, as well as certain other cancers. Mutations in one of several genes involved in DNA repair during DNA replication have been associated with Lynch syndrome. DNA sequencing was performed for an individual. The results indicated that the individual carries one of the dominant alleles that has been associated with Lynch syndrome. Which of the following best explains how the results should be interpreted? - CORRECT ANSWER The individual has an increased risk of developing colon cancer. Correct. The individual may have an increased risk of developing colon cancer. Not all people with alleles associated with Lynch syndrome develop cancer. An evolutionary biologist hypothesizes that two morphologically similar plant species are not closely related. To test the hypothesis, the biologist collects DNA samples from each of the two plant species