By Princeton Review
Cracking the AP Biology examination, 2010 version brings you confirmed concepts from the specialists on the Princeton overview. This AP Biology test-prep advisor contains every thing you must arrange for the examination, such as:•2 full-length AP perform exams with exact explanations•Accessible, attractive evaluate of most sensible AP Biology themes, together with cells, photosynthesis, molecular genetics, animal constitution and serve as, animal habit and ecology, and more•Quick-study record to assist ideal and assessment key biology terms•Detailed walk-through of the way to put in writing an excellent AP Biology essay•Thorough evaluation of all laboratory exercises•Planning and association the right way to get you the entire option to try day!
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Extra info for Cracking the AP Biology Exam, 2010 Edition (College Test Preparation)
As we saw earlier, enzymes, by definition, catalyze reactions: They activate them. What this means in chemical terms is that they lower the activation energy of a reaction, enabling the reaction to occur much faster than it would in the absence of the enzyme. ENZYME SPECIFICITY Most of the crucial reactions that occur in the cell require enzymes. Yet enzymes themselves are highly specific—in fact, each enzyme catalyzes only one kind of reaction. This is known as enzyme specificity. Since this is true, enzymes are usually named after the molecules they target.
Another remarkable property of water is its high heat capacity. What's heat capacity? " What does that mean? In plain English, heat capacity refers to the ability of a substance to store heat. For example, when you heat up an iron kettle, it gets hot pretty quickly. Why? Because it has a low specific heat. It doesn't take much heat to increase the temperature of the kettle. Water, on the other hand, has a high heat capacity. You have to add a lot of heat to get an increase in temperature. Water's ability to resist temperature changes is one of the things that helps keep the temperature in our oceans fairly stable.
The linkage now formed between the glycerol molecule and the fatty acids are called ester linkage. A fatty acid can be saturated, which means it has a single covalent bond between each pair of carbon atoms or it can be unsaturated, which means adjacent carbons are joined by double bonds instead of single bonds. A polyunsaturated fatty acid has many double bonds within the fatty acid. Lipids are important because they function as structural components of cell membranes, sources of insulation, and a means of energy storage.