A mutation inserts two nucleotides in the 23rd codon of a bacterial gene encoding a 60-amino acid protein, eliminating the protein function. Which of these additional changes to the mutant gene is most likely to suppress the effect of the first mutation? O Deletion of two nucleotides from the 3rd codon. Insertion of two nucleotides from the corresponding tRNA anticodon. Insertion of a single nucleotide in the 21st codon. O Deletion of a single nucleotide from the 51st codon. Deletion of a single nucleotide from the 24th codon.

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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.