BIOL 111 SECTION 544 555Instructor Dr Xie Name U I N Exam 1Form A 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 AAn 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 Which of these is an example of inductive reasoning 1 A If two species are members of the same genus they are more alike than each of them could beto a different genus B If protists are all single celled then they are incapable of aggregating C Hundreds of individuals of a species have been observed and all are photosynthetic therefore we can conclude that this species is photosynthetic D According to observation all mammals have backbones Since rats are mammals they musthave backbones 2 When the atoms involved in a covalent bond have the same electronegativity what type of bondresults 2 A an ionic bondB a hydrogen bondC a polar covalent bondD a nonpolar covalent bond3 In carbohydrates the ratio of hydrogen H to oxygen O is 3 A 1 1B 2 1C 3 1D 4 14 Which of the following is true of carbon atomic number 6 4 A It can only form nonpolar bonds B It forms a tetrahedral molecule by binding to four hydrogens C It can form a maximum of three covalent bonds with other elements D It is more electronegative than Oxygen atomic number 8 5 Which of the following molecules is considered as a disaccharide 5 A B C D 2 6 Which of the pairs of molecular structures shown depict enantiomers enantiomeric forms of thesame molecule 6 A B C D 7 A water molecule CANNOT form hydrogen bonding with 7 A Molecules with polar functional groupsB HydrocarbonsC Other water moleculesD Polar molecules3 8 Based on Carl Woese s phylogenetic tree of the three domains of life which of the following twogroups are more closely related 8 A All three are equally related B Archaea and EukaryaC Bacteria and ArchaeaD Eukarya and Bacteria9 Which of the following nitrogenous bases is a purine 9 A CytosineB ThymineC AdenineD Uracil10 Which of the following statements is true about buffer solutions 10 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 11 Which of the following orders is the correct trend in terms of the hierarchy of the organization 11 A Ecosystem cid 15 Community cid 15 Biosphere cid 15 Population cid 15 OrganismB Macromolecules cid 15 Cells cid 15 Tissues cid 15 Organs cid 15 OrganismsC Organism cid 15 Tissues cid 15 Organ system cid 15 Cells cid 15 MacromoleculesD Biosphere cid 15 Ecosystem cid 15 Population cid 15 Community cid 15 Organism12 Carbon 14 has the same 12 A atomic number and thus number of neutrons as carbon 13B number of protons but these protons are more radioactive than the ones in carbon 12C atomic mass as both carbon 12 and carbon 13D number of protons but more neutrons than carbon 1213 How much of 0 5 M glucose molecular mass 180 g mol is needed to provide 100 mg of glucose 13 A 0 11 mLB 100 mLC 10 mLD 1 11 mL4 14 What is the pH of a solution with a hydrogen ion concentration of 10 10M 14 A pH 2B pH 12C pH 10D pH 415 Which of the following is not a polymer 15 A starchB celluloseC fructoseD proteinE glycogen16 According to the levels of organization of living things discussed in class all the TAMU studentsin Aggieland belong to one 16 A EcosystemB CommunityC PopulationD Family17 Which of the following is broken when water evaporates 17 A ionic bondsB polar covalent bondsC hydrogen bondsD nonpolar covalent bonds18 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 18 A 180 g of glucose and then add more water until the total volume of the solution is 1 LB 1 g of glucose and then add more water until the total volume of the solution is 1 LC 18 g of glucose and then add more water until the total volume of the solution is 1 LD 180 g of glucose and then add 0 3 L more of water19 Hydrophobic substances such as hydrocarbons are 19 A nonpolar substances that have an attraction for water moleculesB polar substances that have an affinity for waterC nonpolar substances that repel water moleculesD polar substances that repel water molecules20 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 20 A Both belong to the same domain B Both have genetic material in nucleus C The person and Streptococcus have nothing in common D Both are made up of cells 21 Which of the following is considered to be a weak acid 21 A NH3 ammonia B H2CO3 carbonic acid C NaOH sodium hydroxide D HCl hydrochloric acid 22 How many molecules of water are released during the polymerization of a 20 monomer longcellulose molecule 22 A 19B 10C 40D 2023 What is the valence of a carbon atom 23 A 4B 2C 3D 85 24 Which of the following best summarizes the relationship between dehydration reactions andhydrolysis 24 A Hydrolysis reactions create polymers and dehydration reactions create monomers B Dehydration reactions eliminate water from membranes hydrolysis reactions add water
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