20. Fill in this table with the effects that this mutation would have on mRNA and protein sequence and pro- duction. For "MRNA sequence" and "protein sequence", I am asking if the structure of these molecules (i.e., their sequence) changes. For "# of mRNA molecules" or "# of protein molecules", I am asking of the expression of these genes (i.e., how much mRNA or protein will be made) changes. It doesn't matter if the protein or DNA works or not. Assume each mutation is homozygous. # of mRNA protein # of protein protein molecules mRNA sequence molecules sequence function (best guess!) a mutation in promoter that leads to stronger binding of RNA polymerase a mutation in silencer that leads to weaker binding of repressor transcription factor a mutation in enhancer that leads to weaker binding of acti- vator transcription factor

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.