Claudio is out on a whale watching boat trip. He sees a dolphin near the boat because light waves pass through his cornea and enter his eye through the pupil. Which step of processing in the visual system does this describe?

Physical stimulus perception

Explanation:

The visual system is the coordinated system which includes the eyes and brain which allows us to visualise or see the surrounding environment.

The visual system processing involves the physical stimulus, perception of the physical stimulus by the sensory cells, transduction or transmission of the signal to the brain, perceiving the signal.

In the given question, the light enters the eye means that the first step of visualisation that is physical stimulus perception is achieved.

Thus, Physical stimulus perception is correct.

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.

not sure if this is what you'r looking for nnew= nold