Practice FRQ 2. In humans, pancreatic cells synthesize the protein insulin in the endoplasmic reticulum (ER). Patients
diagnosed with type 1 diabetes have immune systems that mistakenly attack their pancreatic cells.
Therefore, these patients cannot produce the hormone insulin and have to take medications to introduce
insulin into their bodies. (a) Describe how insulin would be produced in a nomal functioning (non-type 1
diabetes) pancreatic cell.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.