NUTR 2320 Topic 3 Exam Questions and Answers Already Passed Latest Update

NUTR 2320 Topic 3 Exam Questions and Answers Already Passed Latest Update Nitrogen Cycle - Answers The transfer of nitrogen from the atmosphere to the soil, to living organisms, and back to the atmosphere Plant vs Animal Structures - Answers - plant structures are built on carbohydrates - animal structures are build on proteins which are constantly under construction (build, repair, maintain) Deamination - Answers the removal of the nitrogen-containing part of amino acids to form urea; required for protein to provide energy The Nitrogen Cycle - Answers - Plants incorportate inorganic nitrogen into amino acids (AAs) with help from nitrogen fixing bacteria and then build proteins with the AA - Animals eat plants and/or animals and convert AAs into their own proteins - humans eat plants and animals and convert AAs to their own proteins - everything dies, returns to the soil, and recycles Amino Acid Structure - Answers - Carb + Nitrogen = AA - 20 total AA - transamination of AA requires B6 - contains carbon, hydrogen, oxygen, and nitrogen (2 contain sulfur) - organic compounds Nine - Answers How many essential amino acids are there? Eleven - Answers How many non-essential amino acids are there? 0.8/kg/day - Answers What is the adult DRI for proteins? 10-35% of total calories - Answers What is the AMDR for protein? AA's hook together by peptide bonds to form a polypeptide which folds and interacts to form a complete protein - Answers How do amino acids build functional proteins? Primary Structure of AA - Answers sequence of amino acids Secondary Structure of AA - Answers alpha helix or beta sheet Tertiary Structure - Answers Monomeric 3D protein Quaternary Structure AA - Answers greater than one polypeptide unit of protein Protein Classification - Answers - based on AA composition, digestibility, and ability to support growth - complete/high biological value/high quality - incomplete/low biological value/low quality