AP Biology Unit 6 MCQ Question with complete solution 2023 Which of the following claims about the TYR, TRP2, and TRP1 mammalian genes is most likely to be accurate? - correct answers The TYR, TRP2, and TRP1 genes may be located on different chromosomes but are activated by the same transcription factor.Which of the following claims best explains why keratinocytes do not produce melanin?
- correct answers Keratinocytes do not express the MITF gene.
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Which of the following pieces of evidence would best support the researchers' claim above? - correct answers When researchers applied a drug that activates adenylyl cyclase to the mutant mice's ears, the level of melanin increased.Based on the information provided in Figure 1 and Figure 2, which of the following best predicts the effects of a mutation in the promoter of the TYR gene that prevents it from being transcribed? - correct answers Skin pigmentation will not be able to change, resulting in a negative selection pressure.Which of the following best explains a process occurring between point 1 and point 2 in Figure 3 ? - correct answers A poly-A tail is added to RNA Researchers discovered a mutant form of the TYR gene with a deletion of a single guanine nucleotide in the beginning of the coding sequence. - correct answers The mutation will change all subsequent amino acids in the TYR protein, leading to nonfunctional TYR protein. Individuals with this mutation will lack melanin in their hair, skin, and eyes and will not tan in response to UV radiation.Which of the following statements best explains the experimental results observed in Figure 1 ? - correct answers E. coli in lane C have been successfully transformed and contain additional genetic information.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 answers Prokaryotic DNA - Single circular chromosome Eukaryotic DNA - Multiple linear chromosomes Which of the following best explains how the results should be interpreted? - correct answers The individual has an increased risk of developing colon cancer.Given the results shown in Figure 1, which of the following correctly describes a relationship between the two species? - correct answers Species B has more short fragments of DNA than species A does