Biology for a Changing World
Michèle Shuster, Janet Vigna, Gunjan Sinha, Matthew Tontonoz
Format: PDF / Kindle (mobi) / ePub
Scientific American Biology: Scientific American: Biology for a Changing World captivates students with real-world stories exploring the science concepts in context. Written by a team of two full-time college biology instructors and two science writers, with extensive input from non-majors instructors across the country, this book was developed to meet the different learning styles of the 21st century student.
Vector, searchable, copy found on TPB from Team Nanban. File is identical here, just renamed, so you can cross-seed.
incomplete or misleading ways. increasingly Twitter-size attention spans. Consider the grande cup of coffee or the Red Why the mixed messages? Are researchers Bull you may have had with breakfast this mornmaking mistakes? Are journalists getting their ing. Why might consuming coffee or caffeine be CHAPTER 1: PROCESS OF SCIENCE 3 The national average number of Starbucks within a five-mile radius of a single zip code is 10. associated with such dramatically different evidence may be modified
the Boston Globe. President Bill Clinton held a press conference to mark the occasion, declaring, “Today, rock 84001 speaks to us across all those billions of years and millions of miles. It speaks of the possibility of life. If this discovery is confirmed, it will surely be one of the most stunning insights into our universe that science has ever uncovered.” And yet what began with excitement and fanfare quickly took a decidedly sour turn when other researchers stepped up to cast doubt on the
diabetics control swings in blood-sugar levels. digest than does carbohydrate. Slowing down digestion reduces the risk of surges in blood sugar that are dangerous for diabetics (Info- Fighting Chronic Disease Developing foods with health benefits isn’t graphic 4.5). Does it work? “Some food additives, like Nestlé’s only goal. Nestlé is, after all, a company, dietary fiber, do have solid evidence behind and companies are in the business of earning them,” says Jeya Henry, professor of human money.
Micronutrients such as minerals and vitamins, found abundantly in fruits and vegetables, are important cofactors. CHAPTER 4: NUTRITION, METABOLISM, ENZYMES 77 Chapter 4 Test Your Knowledge NUTRITION AND METABOLISM Food is a source of nutrients that our bodies need in order to build the macromolecules of cells and function properly. Metabolic reactions break down and build macromolecules. HINT See Infographics 4.1, 4.2,4.5, 4.6, 4.8. j KNOW IT a. insulin b. cell membrane phospholipids c.
nucleotides U U C A A G T A G G binds to the regulatory sequence just ahead of the gene’s coding region. The DNA strands unwind, exposing the coding sequence of the gene. 2. RNA polymerase moves along the DNA strand. As it moves, it “reads” the DNA coding sequence and synthesizes a complementary mRNA strand according to the rules of base pairing, except that in RNA, adenine (A) pairs with uracil (U). C C T 3. As the mRNA strand is DNA nucleotides Growing mRNA strand formed, it detaches