BIOL 111 SECTION 544 555Instructor Dr Xie Name U I N Exam 1Form B September 26 2025 INSTRUCTIONS 1 Sign your name in the space marked SIGNATURE at the bottom of this page NOTE Enter your name and U I N at the top of this pageBecause these forms are computer graded it is extremely important that the following information iscorrect Please check your responses 2 Print your First and Last name NEATLY on the Name box at the top left of the bubble sheet 3 Print your UIN Universal Identification Number in the ID box 9 digit number on your student ID 5 Enter the Section Date and Exam in the corresponding boxes of the bubble sheet6 Sign the bubble sheet in the box labeled Aggie Honor Code Signature 7 Bubble in your answers to the corresponding number row on the bubble sheet Bubble your answerin as fully and neatly as possible 8 Please check that you have 40 questions ALWAYS CHOOSE THE BEST ANSWER BAn Aggie does not lie cheat or steal or tolerate those who do On my honor as an Aggie I have neither given nor received unauthorized aid on thisacademic work Your Signature2025 Texas A M University Biology Department Unauthorized use of this material is aviolation of federal law MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question 1 MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question 1 According to the levels of organization of living things discussed in class all the TAMU studentsin Aggieland belong to one 1 A CommunityB PopulationC FamilyD Ecosystem2 Which of the following is broken when water evaporates 2 A polar covalent bondsB nonpolar covalent bondsC hydrogen bondsD ionic bonds3 Use the figures to answer the question Which molecule shown can increase the concentration of hydrogen ions in a solution and istherefore an organic acid 3 A AB BC CD D4 When the atoms involved in a covalent bond have the same electronegativity what type of bondresults 4 A a hydrogen bondB a nonpolar covalent bondC an ionic bondD a polar covalent bond5 Which of the following nitrogenous bases is a purine 5 A AdenineB ThymineC UracilD Cytosine6 You disrupt all hydrogen bonds in a protein What level of structure will be preserved 6 A primary structureB secondary structureC tertiary structureD quaternary structure7 In carbohydrates the ratio of hydrogen H to oxygen O is 7 A 1 1B 2 1C 3 1D 4 18 A water molecule CANNOT form hydrogen bonding with 8 A Molecules with polar functional groupsB Other water moleculesC HydrocarbonsD Polar molecules9 What is the pH of a solution with a hydrogen ion concentration of 10 10M 9 A pH 10B pH 4C pH 2D pH 1210 Which of the following is considered to be a weak acid 10 A H2CO3 carbonic acid B HCl hydrochloric acid C NH3 ammonia D NaOH sodium hydroxide 2 11 Which of the following functional groups is least likely to be found in an amino acid with anonpolar side chain 11 A methyl group CH3 B sulfhydryl group SH C amino group NH2 D carboxyl group COOH 12 Which of the following molecules is considered as a disaccharide 12 A B C D 13 Carbon 14 has the same 13 A atomic mass as both carbon 12 and carbon 13B number of protons but these protons are more radioactive than the ones in carbon 12C atomic number and thus number of neutrons as carbon 13D number of protons but more neutrons than carbon 1214 How much of 0 5 M glucose molecular mass 180 g mol is needed to provide 100 mg of glucose 14 A 1 11 mLB 100 mLC 0 11 mLD 10 mL15 A person suffering from Streptococcus throat infection Identify which of the following statementsbest describes what the person and bacteriaStreptococcus responsible for the infection have incommon 15 A Both belong to the same domain B The person and Streptococcus have nothing in common C Both have genetic material in nucleus D Both are made up of cells 3 16 Based on Carl Woese s phylogenetic tree of the three domains of life which of the following twogroups are more closely related 16 A Bacteria and ArchaeaB Eukarya and BacteriaC Archaea and EukaryaD All three are equally related 17 How would acidification of seawater affect marine organisms Acidification of seawater would 17 A increase dissolved carbonate concentrations and promote faster growth of corals andshell building animalsB decrease dissolved carbonate concentrations and hinder growth of corals and shell buildinganimalsC increase dissolved carbonate concentrations and hinder growth of corals and shell buildinganimalsD decrease dissolved carbonate concentrations and promote faster growth of corals andshell building animals18 Which type of fatty acid structure is most likely to make a lipid solid at room temperature 18 A Fatty acids with many cis double bondsB Fatty acids that are fully saturated no double bonds C Fatty acids with a higher number of glycerol moleculesD Fatty acids that are unsaturated in their hydrocarbon chains19 Which of the following statements is true about buffer solutions 19 A They fluctuate in pH when either acids or bases are added to them B They maintain a constant pH of 7 C They maintain a constant pH when acids are added to them but not when bases are added tothem D They maintain a relatively constant pH when either acids or bases are added to them 4 20 A covalent chemical bond is one in which 20 A Valence electrons of two atoms are shared B Electrons are not symmetrically distributed in a molecule C Valence electrons are transferred between two atoms D Protons and neutrons are shared by two atoms 21 Which of the following descriptions of prokaryotes and eukaryotes is NOT TRUE 21 A Prokaryotes have no mitochondria and eukaryotes have mitochondria B Prokaryotes belong to Bacteria and Archaea eukaryotes belong to Eukarya C Prokaryotes belongs to Bacteria and Eukarya eukaryotes belongs to Archaea D Prokaryotes have no nucleus and eukaryotes have nuclei E Prokaryotes are smaller than eukaryotes 22 How many molecules of water are released during the polymerization of a 20 monomer longcellulose molecule 22 A 20B 40C 10D 1923 The molecular weight of glucose is 180 grams per mole g mol Which of the following proceduresshould you carry out to make a 1 M solution of glucose In 0 7 liters L of water dissolve 23 A 180 g of glucose and then add more water until the total volume of the solution is 1 LB 18 g of glucose and then add more water until the total volume of the solution is 1 LC 180 g of glucose and then add 0 3 L more of waterD 1 g of glucose and then add more water until the total volume of the
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