ap-bio_emergence-of-organic-molecules-multiple-choice_2014-12-08_11474.odt

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AP Biology Emergence of Organic Molecules
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Quantitative Review – Emergence of Organic Molecules 1. A sample of glycogen contains the molecular formula C 120 H 202 O 101 . How many molecules of water will it require to hydrolyze this molecule into its glucose building blocks? 2. Basic peanut butter cookies can be made by using just three ingredients: 1 cup peanut butter, 1 cup sugar, and 1 egg. This recipe makes 24 cookies. Based on the nutritional information below, calculate how many calories, rounded to the nearest calorie, are consumed when you eat two cookies. Biomolecule Calories per gram Fat 9 Carbohydrate 4 Protein 4 Peanut Butter (1 cup) Sugar (1 cup) Egg (1) Fat (g) 128 0 5 Carbohydrates (g) 48 192 1 Protein (g) 54 0 7 3. There are 20 different possibilities for side chains in amino acids. Glycine is a side chain composed of one hydrogen atom. Alanine is a side chain composed of CH 3 . Serine is a side chain composed of a hydroxyl group, OH. If an amino acid chain, composed of glycine, alanine, and serine is synthesized via dehydration synthesis, how many oxygen atoms will the molecule contain? 4. While the origins of Earth are predicted to have occurred 4.6 billion years ago, the earliest life forms did not evolve until 3.9 billion years ago. Eukaryotic organisms evolved 2.1 billion years ago, with multicellular organisms evolving 1.5 billion years ago. How many billion years elapsed between the evolution of eukaryotes and the evolution of multicellular organisms? 5. An average person who consumes 2,000 calories per day has a daily recommended intake of no more than 65 grams of fat. For lunch today, you take a trip to McDonald’s and have a double quarter pounder with cheese (43 g fat) and large French fries (25 g AP Biology Emergence of Organic Molecules
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fat). Knowing that there are 9 calories in each gram of fat, by how many calories have you exceeded your daily recommended intake of calories from fats? 6. When the phospholipid shown below is hydrolyzed, how many hydrogen atoms will be in each fatty acid? AP Biology Emergence of Organic Molecules
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ANSWER KEY 1. 19 2. 200 calories 3. 5 4. 0.6 5. 27 6. 30 AP Biology Emergence of Organic Molecules
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