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Unformatted text preview: Version 100 Exam 1 Sathasivan (49810) 1 This print-out should have 42 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points One mole (mol) of a substance is equal to 1. 100 g of the substance dissolved in 1 L of solution. 2. 6.02 grams dissolved in 1 L of solution. 3. 6 . 02 10 23 grams of the substance. 4. the molecular weight of a substance ex- pressed in mL. 5. the molecular weight of the substance expressed in grams. correct Explanation: Comprehension and recall 002 10.0 points The functional group of the amino acid thre- onine is- OH. The functional group of the amino acid valine is methyl. Where would you expect to find these amino acids in globular protein in aqueous solution? 1. Threonine would be in the interior, and valine would be on the exterior of the globular protein. 2. Both would be on the exterior of the globular protein. 3. Both would be in the interior and on the exterior of the globular protein. 4. Valine would be in the interior, and thre- onine would be on the exterior of the globular protein. correct 5. Both would be in the interior of the glob- ular protein. Explanation:- OH is hydrophillic and would be normally found on the exterior and methyl group in valine makes it hydrophobic and found in the interior part of a protein. 003 10.0 points Animals combine 1000 of the monomer H HO CH 2 OH H H OH OH H H OH O and store them as 1. steroid. 2. DNA. 3. protein. 4. starch. 5. glycogen. correct Explanation: First you need to identify the monomer as a simple sugar and then figure out that a polymer of 1000 such monomers will make a polysaccharide. Then recall the storage polysaccharide in animal glycogen. Only plants make starch as storage polysaccharide. 004 10.0 points A chemist wishes to make an organic molecule non-acidic. Which functional group should be removed in the molecule, if it is present? 1. sulfhydryl 2. carbonyl 3. amino 4. hydroxyl 5. carboxyl correct Version 100 Exam 1 Sathasivan (49810) 2 Explanation: Comprehension and application 005 10.0 points Hydrogen bonds will be formed between 1. two oxygen atoms. 2. ammonia and a water molecule. correct 3. two hydrogen atoms. 4. Ca and Cl in CaCl 2 . 5. C and O in carbon dioxide. Explanation: The hydrogen in water and the nitrogen in ammonia or the hydrogen in ammonia and the oxygen in water will make H-bonds. 006 10.0 points After measuring CO 2 concentration and tem- peratures in several parts of the world, scien- tists concluded that global warming is hap- pening for real. This type in inference is what kind of approach? 1. political 2. social 3. deductive 4. extensive 5. inductive correct Explanation: 007 10.0 points Which of the following statements is NOT true about all living things?...
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- Spring '10