Exam 1-solutions - Version 114 – Exam 1 – sathasivan...

Download Document
Showing pages : 1 - 3 of 7
This preview has blurred sections. Sign up to view the full version! View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Version 114 – Exam 1 – sathasivan – (48535) 1 This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 2.0 points Denaturation of double-stranded DNA by heat results in the separation of 1. hydrogen bonds. correct 2. van der Waals forces. 3. hydrophobic interactions. 4. ionic bonds. 5. covalent bonds. Explanation: 002 2.0 points What happens when a vegetable oil is hydro- genated? 1. The number of carbon atoms in the oil molecule decreases. 2. The number of carbon atoms in the oil molecule increases. 3. The number of carbon-carbon double bonds in the oil molecules decreases. cor- rect 4. The ratio of carbon to hydrogen in- creases. 5. The oil becomes liquid at room tempera- ture. Explanation: Hydrogenation adds hydrogens to the car- bon skeleton and the number of C-C double bonds decreases and the oil becomes solid at room temperature. 003 2.0 points The molecular weight of NaOH is 40. To make a 0.5 M solution of NaOH, you should have 1. 4 g of NaOH dissolved in 200 mL of solution. correct 2. 40 g of NaOH dissolved in 100 mL of solution. 3. 4 g of NaOH dissolved in 1 L of solution. 4. 4 g of NaOH dissolved in 100 mL of solution. 5. 40 g of NaOH dissolved in 1 L of solu- tion. Explanation: 4 g dissolved in 200 mL: 4 g 200 mL = 0 . 5 M is the same as 20 g dissolved in 1000 mL: 20 g 1000 mL = 0 . 5 M 004 (part 1 of 2) 2.0 points The molecule Version 114 – Exam 1 – sathasivan – (48535) 2 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 is a 1. steroid. 2. protein. 3. triglyceride. 4. phospholipid. correct 5. monoglyceride. Explanation: Recall and application 005 (part 2 of 2) 2.0 points Which part of a cell will contain this molecule as its main component? 1. cytoskeleton 2. nucleus 3. cell wall 4. cell membrane correct 5. cytoplasm Explanation: The above molecule is a phospholipid; they are major components of cell membranes....
View Full Document