Exam 2 Homework/TICA/IKE, Questions with accurate answers, latest update, graded A

Exam 2 Homework/TICA/IKE, Questions with accurate answers, latest update, graded A Document Content and Description Below Exam 2 Homework/TICA/IKE, Questions with accurate answers, latest update, graded A A. Primary structure - 1. Linear sequence of amino acids B. Secondary structure - 2. Formation of alpha helices and beta sheets C. Tertiary structure - 3. Overall 3-D shape of the folded protein D. Quarternary structure - 4. Assembly of 2 or more polypeptide chains into a complex What kind of amino acids would occur most frequently in the transmembrane domains of integral membrane proteins? a. amino acids with positively charged side groups b. amino acids with polar side groups c. amino acids with negatively charged side groups d. amino acids with hydrophobic side groups e. Any amino acid, with no preference - d. amino acids with hydrophobic side groups What components of biomass contain large amounts of nitrogen? A. carbohydrates and proteins B. nucleic acids and proteins C. proteins and lipids D. lipids and polysaccharides E. proteins, lipids, carbohydrates and nucleic acids - B. nucleic acids and proteins Both alpha- and beta-hemoglobin chains have mostly alpha-helices, and no beta-sheets. What forces or bonds are responsible for formation and stabilization of alpha-helices? A. covalent disulfide bonds B. hydrogen bonds C. ionic bonds D. hydrophobic interactions E. Van der Waals interactions - B. hydrogen bonds A newly discovered, single-celled organism has a circular chromosome and membrane phospholipids with ether-linked isoprenoid chains. Based on this information, this organism belongs to which domain of life? A. Archaea B. Bacteria C. Eukaryotes D. Prokaryotes E. Either Bacteria or Eukaryotes - A. Archaea The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than inside. Phosphate import depends on energy provided by a pH gradient across the membrane. Phosphate transport is an example of: A. passive diffusion B. facilitated diffusion C. active transport D. osmosis - C. active transport Red blood cells are placed in a hypotonic solution (deionized water), and they swell up. How does water get into the cells? A. by simple diffusion through the lipid bilayer membrane B. by facilitated diffusion through aquaporins C. by active transport through aquaporins D. by hitchhiking with phosphate, glucose, and other molecules that are transported into the cell - B. by facilitated diffusion through aquaporins Hemoglobin is a water-soluble, globular protein made of 2 alpha-hemoglobin and 2 beta-hemoglobin polypeptide chains. Hemoglobin is present in large amounts in the cytoplasm of red blood cells. Where in the cell are the alpha- and beta-hemoglobin proteins made? A. in the cytoplasm, by free cytoplasmic ribosomes B. by ribosomes docked to the rough ER C. by ribosomes docked to the nuclear envelope D. by ribosomes docked to the plasma membrane E. by ribosomes in the mitochondria - A. in the cytoplasm, by free cytoplasmic ribosomes Which of these shows the correct order of a secreted protein trafficking through a cell, from its site of synthesis to exit from the cell? A. smooth ER -> rough ER -> plasma membrane B. smooth ER -> Golgi -> rough ER -> plasma membrane C. rough ER -> smooth ER -> Golgi -> plasma membrane D. rough ER -> smooth ER ->plasma membrane E. Golgi -> smooth ER -> rough ER -> plasma membrane - C. rough ER -> smooth ER -> Golgi -> plasma membrane Which of the following show(s) saturation kinetics? Select all that apply A.simple diffusion B active transport C. facilitated diffusion D.enzyme-catalyzed reactions E.none of these show saturation kinetics - B, C, and D active transport, facilitated diffusion, enzyme-catalyzed reactions