• BIO201_MH_V3 • Topic 2: Chemistry for Anatomy and Physiology Students QUIZ | Already Graded A

• BIO201_MH_V3 • Topic 2: Chemistry for Anatomy and Physiology Students Question text Hydrogen bonds form between molecules containing bonds; the hydrogen bond is between a hydrogen atom of one molecule and a partially charged atom of another. Select one: a. polar covalent; negatively b. polar covalent; positively c. nonpolar covalent; positively d. nonpolar covalent; negatively e. ionic; positively Question 2 Correct 1.75 points out of 1.75 Flag question Question text The molecular formula H2O means Select one: a. 1 hydrogen atom and 2 oxygen atoms. b. 1 hydrogen atom and 1 oxygen atom. c. 2 hydrogen atoms and 1 oxygen atom. d. 2 hydrogen atoms and 2 oxygen atoms. e. None of these choices is correct. Question 4 Correct 1.75 points out of 1.75 Flag question Question text An individual hydrogen bond in a sample of water would be described as: Select one: a. strong and intramolecular. b. strong and intermolecular. c. weak and intramolecular. d. weak and intermolecular. Question 5 Correct 1.75 points out of 1.75 Cations and anions that dissociate in water are sometimes called Select one: a. nonelectrolytes, because they do not conduct an electrical current. b. molecules c. electrolytes, because they can conduct an electrical current. d. nonelectrolytes and solutes. e. molecules and electrolytes. Question 6 Correct 1.75 points out of 1.75 Flag question Question text The conversion between different states of energy (e.g. potential energy to kinetic energy): Select one: a. is not 100% efficent b. is 100% efficent c. typically generates heat d. is not possible, energy can not change its state. e. is not 100% efficient and typically generates heat Question 7 Correct 1.75 points out of 1.75 The number of atoms in exactly 12 grams of carbon-12 is called Select one: a. Dalton's number. b. Socrates's number. c. Avogadro's number. d. Pasteur's number. e. Le Chatelier's number. Question 8 Correct 1.75 points out of 1.75 Flag question Question text Intermolecular forces Select one: a. form dissociated ions. b. are electrostatic attractions between different molecules. c. evenly distribute electrical charge among all atoms in a sample. d. separate atoms and ions from one another. e. are found within molecules. Question 9 Correct 1.75 points out of 1.75 Which of the following is a synthesis reaction? Select one: a. Two amino acids are bonded together to form a dipeptide. b. Sucrose is chemically separated to form one molecule of glucose and one molecule of fructose. c. Sodium chloride is dissolved in water. d. Several dipeptide chains are formed from digestion of a long polypeptide chain. e. ATP is converted to ADP. Question 10 Incorrect 0.00 points out of 1.75 Flag question Question text If the products of a chemical reaction contain less potential energy than the reactants, Select one: a. energy has been stored in the molecular bonds of the product. b. energy has been released by the breaking of molecular bonds. c. the reaction will be reversible without additional energy input. d. a synthesis reaction is likely to have occurred. e. All of these choices are correct. Question 11 Correct Which of the following is NOT a function of carbohydrates in the body? Select one: a. structural component of DNA b. protection c. bulk in feces d. energy e. structural component of RNA Question 12 Correct 1.75 points out of 1.75 Flag question Question text The building blocks of proteins are Select one: a. triglycerides. b. phospholipids. c. amino acids. d. monosaccharides. e. eicosanoids. Question 13 Correct Identify the material that would NOT be considered an important inorganic substances in our bodies. Select one: a. carbon b. oxygen c. calcium d. iron Question 14 Correct 1.75 points out of 1.75 Flag question Question text Lipids Select one: a. are subunits of carbohydrates. b. serve as buffers. c. are an important component of cell membranes. d. tend to be water soluble. e. are polarized. Question 15 Correct 1.75 points out of 1.75 From the following list, select the one organic substance found in the human body. Select one: a. oxygen b. water c. glucose d. calcium Question 16 Correct 1.75 points out of 1.75 Flag question Question text An organic molecule such as a vitamin that makes an enzyme functional is called a/an Select one: a. buffer. b. coactivator. c. catalyst. d. coenzyme. Question 17 Correct 1.75 points out of 1.75 What molecule is produced as a waste product of the metabolism of glucose by cells? Select one: a. water b. oxygen c. carbon dioxide d. carbon monoxide e. nitrogen Question 18 Correct 1.75 points out of 1.75 Flag question Question text Which of the following statements is false? Select one: a. Water allows the body to resist sudden temperature changes. b. Water transports nutrients in the body. c. Water serves as an effective lubricant in our bodies. d. Water evaporation cools the body. e. Water evaporation heats the body. Question 19 Correct 1.75 points out of 1.75 Which of the following is the correct sequence from smallest to largest? Select one: a. amino acid, cell, protein, atom b. amino acid, atom, cell, protein c. cell, protein, amino acid, atom d. atom, amino acid, protein, cell e. protein, cell, amino acid, atom Question 20 Correct 1.75 points out of 1.75 Flag question The sodium chloride molecule breaks apart in water. What does "D" represent? Select one: a. chloride ion b. dissociation c. water molecule d. sodium ion e. salt crystal