diagram modeling the pathway by which a nitrogen atom in a protein in a bird can become incorporated into a protein in a plant.

Name the essential element involved in each process: changes the osmotic potential in guard cells as they swell or shrink, present in all nucleotides and amino acids, carries electrons in chlorophyll, present in cytochromes, present in plastocyanins, involved in nitrogen metabolism, present in the water-splitting enzyme of photosystem II, present in ATP, present in the middle lamella, and important in regulating the activity of many enzymes.

Identify major pathways where moleculescan be redirected or converted into usefulcell products.

What is the function of the structure indicated by the arrow? CHD Answers A -E A ATP production B Glycosylation of proteins C Production of MRNA Production of ribosomal RNA Translation of MRNA into proteins