Consider the following chemical reaction: Hb + O2 → HbO2 When this reaction is going from right to left, what process is occurring? O a. oxygen unloading

O b. cellular respiration

O c. pulmonary ventilation

O d.oxygen loading

I believe the answer is Intron IV, Introns are non-coding regions while exons are the coding regions. In most eukaryotic genes, coding regions (exons) are interrupted by non coding regions (introns). During transcription, the entire gene is copied into a pre-mRNA splicing, introns are removed and exons joined to form a contiguous coding sequence.