A carbon, sodium, hydrogen, nitrogen B carbon, oxygen, phosphorus, hydrogen C oxygen, hydrogen, calcium, nitrogen D carbon, hydrogen, nitrogen, oxygen E carbon, oxygen, nitrogen, calcium Which of the following statements is false? You can still use bulletin board code and smileys as you would in a normal post. E Both the forward and the reverse reactions have stopped with no net effect on the concentration of the reactants and the products. The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. E altered primary structure and altered quaternary structure; the secondary and tertiary structures may or may not be altered. Answer: B Topic: Concept 5.
Based on this information alone, we can conclude that sickle-cell hemoglobin exhibits A altered primary structure. B A diet rich in this molecule may contribute to atherosclerosis. C Each hydrogen atom has a slight negative charge; the nitrogen atom has a strong positive charge. What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions? E Theories are proved true; hypotheses are often falsified. E higher density of liquid water than solid water ice. Answer: E Topic: Concept 5. When the blood glucose level is low, the pancreas secretes glucagon and, as a result, the blood glucose level rises.
E 120 guanine and 120 thymine molecules. D three molecules of 5 and one molecule of 9. D is held together by hydrogen bonds. E their cells make different types of proteins. A Molecules 1 and 4 could be joined together by a glycosidic linkage to form a disaccharide.
D are synthesized as a result of peptide bond formation between monomers. What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions? B A diet rich in this molecule may contribute to atherosclerosis. Which of the following statements is true regarding the molecule illustrated in Figure 5. The covalent bonds of methanol molecules are nonpolar, so there are no hydrogen bonds among methanol molecules. Carbohydrates can also be stored as glycogen in the muscles and liver for later use. B humans have enzymes that can hydrolyze the β glycosidic linkages of starch but not the α glycosidic linkages of cellulose.
Which of the following could amylase break down? B They have double bonds between carbon atoms of the fatty acids. B molecules held by ionic bonds react with water. Which of the following statements is true about buffer solutions? E one of the hydrogen atoms donates an electron to the oxygen atom. B The hydrogenated vegetable oil stays solid at room temperature. Answer: B Topic: Concept 5. Hydrophobic substances such as vegetable oil are A nonpolar substances that repel water molecules.
D Both serine and leucine would be on the exterior of the globular protein. A The two strands of the double helix would separate. E the monomer of starch is glucose, while the monomer of cellulose is glucose with a nitrogen-containing group. D The specific heat of the water in the drink decreases. Which of the following statements correctly describes cis-trans isomers? These data suggest that the new organism A is more closely related to humans than to frogs. C Dehydration reactions eliminate water from lipid membranes, and hydrolysis makes lipid membranes water permeable.
D always alter the primary structure of the protein and disrupt its biological activity. A the chemical properties of the element B the number of protons in the element C the number of neutrons in the element D the number of protons plus neutrons in the element E both the number of protons and the chemical properties of the element In what way are elements in the same column of the periodic table the same? E It proved that organic compounds could be synthesized from inorganic compounds and disproved the concept of vitalism. A It provides a framework within which all biological investigation makes sense. Review Questions Set : 1 The price of coffee increases. D Molecules 2, 7, and 8 could be joined together to form a short peptide. The net result is that A water is generated by animal metabolism. A primary B secondary C tertiary D quaternary E all of the above Answer: C Topic: Concept 5.
D Water molecules absorb heat from the surface in order to acquire enough energy to evaporate. Which of the following compounds is most likely to mimic the effects of the hormone? B They are not soluble in water. . D They have the same number of electrons in their valence shell. B Hypotheses are guesses; theories are correct answers. D They are usually liquid at room temperature. E must have the same atomic number, the same number of protons + neutrons, the same number of electrons, and the same chemical properties.
Where would you expect to find these amino acids in a globular protein in aqueous solution? E always alter the primary structure of the protein, sometimes alter the tertiary structure of the protein, and affect its biological activity. C Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between atoms. E All bases would be separated from the deoxyribose sugars. A 2 B 5 C 7 D 9 E 11 Answer: B Topic: Concept 5. Which of the following descriptions best fits the class of molecules known as nucleotides? D The 5' end has a carboxyl group attached to the number 5 carbon of ribose. A It is a saturated fatty acid.
E All structural levels are equally affected. In theory, then, which class of biological polymer has the greatest information-coding capacity? Molecules with which functional groups may form polymers via dehydration reactions? D If protists are all single-celled, then they are incapable of aggregating. Which of the following is true of cellulose? A Serine would be in the interior, and leucine would be on the exterior of the globular protein. C They have the same chemical properties. B The phosphodiester bonds between deoxyribose sugars would be broken.