Life in the Universe - With Activity Manual and Access

4th Edition

ISBN: 9780134575599

Author: Bennett

Publisher: PEARSON

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Chapter 5, Problem 50IF

Cellular Energy. A typical eukaryotic cell, such as a cell in the human body, uses about 2 × 10⁻¹⁷ joule of energy each second. The breakdown of a single molecule of ATP (in which a phosphate separates from ATP to make ADP; see Figure 5.13) releases about 5 × 10⁻²⁰ joule of energy. (a) About how many molecules of ATP must be broken down and reassembled each second to keep a eukaryotic cell alive? (b) How many times does this ATP recycling occur each day in a typical cell? (c) The human body has roughly 10¹⁴ cells. Approximately how many cycles of the ATP reaction occur each day in your body?

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Chapter 5, Problem 49IF

Chapter 5, Problem 51IF

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Small birds like that in (Figure 1) can migrate over long distances without feeding, storing energy mostly as fat rather than carbohydrate. Fat is a good form of energy storage because it provides the most energy per unit mass: 1.00 grams of fat provides about 9.40 (food) Calories, compared to 4.20 (food) Calories per 1.00 grams of carbohydrate. Remember that Calories associated with food, which are always capitalized, are not exactly the same as calories used in physics or chemistry, even though they have the same name. More specifically, one food Calorie is equal to 1000 calories of mechanical work or 4184 joules. Therefore, in this problem use the conversion factor 1 Cal = 4184 J. Figure 1 of 1 Part A Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W (this rate represents the power consumption of the bird). Assume that the bird consumes 4.00 g of fat to fly over a distance do without stopping for…

Small birds like that in (Figure 1) can migrate over long distances without feeding, storing energy mostly as fat rather than carbohydrate. Fat is a good form of energy storage because it provides the most energy per unit mass: 1.00 grams of fat provides about 9.40 (food) Calories, compared to 4.20 (food) Calories per 1.00 grams of carbohydrate. Remember that Calories associated with food, which are always capitalized, are not exactly the same as calories used in physics or chemistry, even though they have the same name. More specifically, one food Calorie is equal to 1000 calories of mechanical work or 4184 joules. Therefore, in this problem use the conversion factor 1 Cal 4184 J. Figure 1 of 1 ▸ View Available Hint(s) db = 455 km Submit Previous Answers ▾ Part B ▶ How many grams of carbohydrate mcarbwould the bird have to consume to travel the same distance db? Express your answer in grams View Available Hint(s) Correct mcarb 8.95 g Submit Part C Previous Answers Correct This is more…

Small birds like that in (Figure 1) can migrate over long distances without feeding, storing energy mostly as fat rather than carbohydrate. Fat is a good form of energy storage because it provides the most energy per unit mass: 1.00 grams of fat provides about 9.40 (food) Calories, compared to 4.20 (food) Calories per 1.00 grams of carbohydrate. Remember that Calories associated with food, which are always capitalized, are not exactly the same as calories used in physics or chemistry, even though they have the same name. More specifically, one food Calorie is equal to 1000 calories of mechanical work or 4184 joules. Therefore, in this problem use the conversion factor 1 Cal = 4184 J. Figure 1 of 1 > Review | Constants Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W (this rate represents the power consumption of the bird). Assume that the bird consumes 4.00 g of fat to fly over a distance do without…

Chapter 5 Solutions

Life in the Universe - With Activity Manual and Access

Ch. 5 - Briefly describe the six key properties that...Ch. 5 - What is natural selection? Summarize the logic by...Ch. 5 - Briefly describe the evidence that points to a...Ch. 5 - Why do we say that living cells are carbon-based?...Ch. 5 - Briefly describe each of the four main classes of...Ch. 5 - Prob. 6RQ Ch. 5 - What are the three domains of life? Which domain...Ch. 5 - What do we mean by the tree of life? List three...Ch. 5 - What is metabolism, and what are the two basic...Ch. 5 - Why is water so important to life on Earth? List...

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