Evaluate whether or not fish farming would have a negative impact on human health.

fish farming is happening in the ocean environment where excess fish waste is released into the environment. this impacts wild fish that humans consume.
fish farming is happening in the ocean environment where excess fish waste is released into the environment. however, this does not impact wild fish that humans consume.
fish farming is not happening in the ocean environment, so excess fish waste is not released into the ocean.
fish farming is not happening in the ocean environment, so excess fish waste would not impact wild fish that humans consume.

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.