Which of the following best explains the process occurring between .1.2 in Figure 3?
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(melanin synthesis pt 1) Show
Figure 1. Melanin synthesis pathway The peptide hormone α-melanocyte stimulating hormone (α-MSH) activates a signal transduction pathway leading to the activation of MITF. MITF is a transcription factor that increases the expression of the TYR, TRP2, and TRP1 genes (Figure 2). Figure 2. Activation of melanin synthesis genes in melanocytes Some mammals increase melanin production in response to ultraviolet (UV) radiation. The UV radiation causes damage to DNA in keratinocytes, which activates the p53 protein. p53 increases the expression of the POMC gene. The POMC protein is then cleaved to produce α-MSH. The keratinocytes secrete α-MSH, which signals nearby melanocytes. The increased melanin absorbs UV radiation, reducing further DNA damage Figure 3. Production of α-MSH in keratinocytes in response to UV radiation Which of the following claims about the TYR, TRP2, and TRP1 mammalian genes is most likely to be accurate? Recommended textbook solutionsHuman Resource Management15th EditionJohn David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine 249 solutions Human Resource Management15th EditionJohn David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine 249 solutions
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Which of the following best explains a distinction between metaphase 1?Which of the following best explains a distinction between metaphase I and metaphase II? Homologous pairs of chromosomes are aligned during metaphase II, but individual chromosomes are aligned during metaphase IIII.
Which of the following correctly explains the process shown in Figure 1?Which of the following correctly explains the process shown in Figure 1 ? Initiation of transcription is occurring because a strand of RNA is being produced from a DNA template strand.
Which of the following best explains the observed distribution pattern of the snails?Which of the following best explains the observed distribution pattern of the snails? The founder effect suggests that dark-colored snails migrated from the southern regions to the north and established the populations found there.
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