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BIOE1 - Version 132 Exam 1 sathasivan(48985 This print-out...

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Version 132 – Exam 1 – sathasivan – (48985) 1 This print-out should have 51 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0points A single covalent chemical bond represents the sharing of how many electrons? 1. Six 2. Two correct 3. Four 4. Three 5. One Explanation: 002 10.0points Which of the following is the correct ranking of the biological hierarchy? select in the or- der from highest to lowest in terms of such hierarchy. 1. tissue, cell, organ, organelle and organ- ism 2. organism, organ, organelle, cell and tis- sue 3. cell, nuclear membrane, DNA, phosphate and oxygen correct 4. cell, tissue, organ, nucleus and organelle 5. nucleus, cell, macromolecule, carbon and tissue Explanation: 003 10.0points Compared with a pH of 7, a solution of pH 5 has what times/fraction of the hydrogen concentration? 1. twice 2. 1 100 3. 5 7 4. nearly the same concentration 5. 100 times correct Explanation: Recall 004 10.0points Which of the the molecules A) H 2 C O C O H 2 C H 2 C H 2 C H 2 C H 2 C H 2 C H 3 C CH O C O CH 2 CH 2 CH 2 CH CH CH 2 CH 2 CH 3 CH 2 O P O O CH 2 CH 2 N - (CH 3 ) 3 B) C O OH C H H C H H C H H C H H C H H C H H C H H H C) O O O O O O O D) H HO CH 2 OH H H OH H H OH O O H OH CH 2 OH H H OH H H OH O
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Version 132 – Exam 1 – sathasivan – (48985) 2 E) HOCH 2 H OH H H OH H OH O F) H HO CH 2 OH H O H OH OH H H OH G) C OH H H C OH H C H HO C H HO C OH H C H O H) C OH H H C OH H C OH H C H HO C OH H C H O I) C CH 2 H 3 N + H C O O CH 2 S CH 3 J) C C H 3 C H H CH 3 K) P OH O O - L) C OH H H C OH H C OH H H M) C C CH 2 H 2 N H SH OH O N) C C N HC N C NH 2 N CH N H O) N H H C H H C OH O could be joined together by an ester linkage? 1. I and O 2. K and N 3. B and L correct 4. G and H 5. A and F Explanation: Comprehension and application 005 10.0points Animals combine 1000 of the monomer H HO CH 2 OH H H OH OH H H OH O and store them as 1. starch. 2. protein. 3. glycogen. correct 4. DNA. 5. steroid. 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. 006 10.0points You have eaten a potato chip that contained starch made of 10,000 glucose monomers com- bined together. After complete digestion through hydroly- sis, this will yield I) 10,000 glucose molecules. II) 10,000 water molecules. III) 9,999 water molecules. IV) 9,999 glucose molecules. 1. III and IV only 2. I and II only
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Version 132 – Exam 1 – sathasivan – (48985) 3 3. I and III only 4. I only correct 5. II only Explanation: Hydrolysis is the breakdown of a larger molecule to simpler molecule. It uses wa- ter and does not form any water molecules. Hence a complete digestion of a polymer with 10,000 monomers will yield only 10,000 monomers. To go into further details, it will utilize 9999 water molecules to break down this larger polymer.
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