A mutation in a bacterial protein-coding gene with a standard consensus promoter deletes the two base pairs at the transcription start site and at the position immediately preceding it (the -1 and +1 positions). What will be the most likely effects, if any, on the transcript and the encoded polypeptide? Both the transcript and the polypeptide will be unchanged. O The transcript will be 2 bases shorter; the polypeptide will be completely different due to a frameshift. The transcript will be 2 bases shorter; the polypeptide will be one amino acid shorter but otherwise unchanged. Transcription will not be initiated, so ncither a transcript nor a polypeptide will be produced. O The transcript will be 2 bases shorter: the polypcptide will be unchanged.

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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.