Homework 7-solutions - jaw2435 Homework 7 Walker(53985 This...

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jaw2435 – Homework 7 – Walker – (53985) 1 This print-out should have 28 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 1.0 points Which statement is NOT true? 1. One optical isomer of Naproxen relieves pain while the other optical isomer causes liver damage. 2. Pseudoephedrine is a nasal decongestant, while the optical isomer ephedrine is a bron- chodilator that also stimulates the sympa- thetic nervous system. 3. Some preparations of aspirin are less ef- fective because they also contain the inactive optical isomer. correct 4. The optical isomer of the addictive opi- ate levomorphan is the non-addictive cough suppressant dextromorphan. Explanation: Aspirin does not exihibit optical isomerism 002 1.0 points The lock and key model of biological interac- tion depends upon 1. acidic pH conditions. 2. random conformation changes. 3. a catalyst. 4. genetic engineering. 5. specific intermolecular forces between re- ceptor and substrate. correct Explanation: 003 1.0 points RU-486 binds to the progesterone receptor site, but has no direct biochemical effect, and as a result 1. the woman’s ovaries start to produce large amounts of norethenodril, which stops ovula- tion and thus conception. 2. women develop male secondary sex char- acteristics and cannot become pregnant. 3. progesterone is blocked out and ovula- tion proceeds normally, effectively aborting the pregnancy with the next menstruation. correct 4. ovulation cannot occur, so pregnancy is avoided. Explanation: 004 1.0 points Anabolic steroids were developed initially for 1. increasing physical strength of athletes. 2. increased brain stimulation. 3. correcting mood swings. 4. the regaining of muscle tissue after illness. correct Explanation: 005 1.0 points A chemical antagonist is a chemical that binds to a receptor site and 1. causes the cell to die. 2. shows increased biological activity. 3. shows no biological activity. correct 4. causes a reversal of normal function. Explanation: 006 1.0 points Androgenic side effects result in accentuating which of the following? I. female characteristics in males II. male characteristics in females III. increased muscle mass 1. III
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jaw2435 – Homework 7 – Walker – (53985) 2 2. I and II correct 3. II 4. I 5. II and III Explanation: 007 1.0 points Identify the chiral carbon atom in L-dopa (used to treat Parkinson’s disease). C H H C H NH 2 C OH O HO HO d b a c 1. b 2. d 3. a 4. c correct Explanation: A chiral carbon atom is borded to four different functional groups. 008 1.0 points Which hormone does a females body release to signal fertilization? 1. norethynodrel 2. estradiol 3. cortizone 4. progesterone correct 5. testosterone Explanation: 009 1.0 points Male sex hormones are known as 1. progesterones.
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