ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
3rd Edition
ISBN: 9780135964422
Author: Urry
Publisher: PEARSON
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Chapter 6.1, Problem 1CC
MAKE CONNECTIONS How does the second law of
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MAKE CONNECTIONS Explain why the set of forces driving ionmovement across the plasma membrane of a cell is described as anelectrochemical (electrical and chemical) gradient (see Concept 7.4).
© Macmillan Learning
A outside
→ Ainside, is 10.9 kJ/mol at 25°C.
Consider a uniport system where a carrier protein transports an uncharged substance A across a cell membrane. Suppose that at
a certain ratio of [A] inside to [A] outside, the AG for the transport of substance A from outside the cell to the inside,
What is the ratio of the concentration of substance A inside the cell to the concentration outside?
[A]inside
[A] outside
-81.28
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Choose the true statement about the transport of A under the conditions described.
Decreasing the concentration of the uniport protein in the membrane will cause AG to become a smaller
positive number.
Because AG is positive, the ratio [A] inside/[A] outside must be less than one.
Increasing [A] outside will cause AG for movement of Aoutside to Ainside to become a larger positive number.
Movement of Ainside to Aoutside will be spontaneous.
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Chapter 6 Solutions
ETEXT CAMPBELL BIOLOGY IN FOCUS INSTANT
Ch. 6.1 - MAKE CONNECTIONS How does the second law of...Ch. 6.1 - Describe the forms of energy found in an apple as...Ch. 6.2 - Cellular respiration uses glucose and oxygen,...Ch. 6.2 - Prob. 2CCCh. 6.2 - Prob. 3CCCh. 6.3 - How does ATP typically transfer energy from...Ch. 6.3 - Prob. 2CCCh. 6.3 - MAKE CONNECTIONS Does Figure 6.10a show passive or...Ch. 6.4 - Many spontaneous reactions occur very slowly. Why...Ch. 6.4 - Why do enzymes act only on very specific...
Ch. 6.4 - WHAT IF? Malonate is an inhibitor of the enzyme...Ch. 6.4 - A mature lysosome has an internal pH of around...Ch. 6.5 - How do an activator and an inhibitor have...Ch. 6.5 - Prob. 2CCCh. 6 - Choose the pair of terms that correctly completes...Ch. 6 - Prob. 2TYUCh. 6 - Which of the following metabolic processes can...Ch. 6 - If an enzyme in solution is saturated with...Ch. 6 - Some bacteria are metabolically active in hot...Ch. 6 - If an enzyme is added to a solution where its...Ch. 6 - DRAW IT Using a series of arrows, draw the...Ch. 6 - Prob. 8TYUCh. 6 - SCIENCE, TECHNOLOGY, AND SOCIETY Organophosphates...Ch. 6 - FOCUS ON EVOLUTION A recent revival of the...Ch. 6 - FOCUS ON ENERGY AND MATTER Life requires energy....Ch. 6 - SYNTHESIZE YOUR KNOWLEDGE Explain what is...
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- Q3 Calculate the actual, physiological AG for the reaction Phosphocreatine Creatine NH--PO3 HN=c NCH,-CO0 NH2 NH=c. HNCH2- COO ČH3 Creatine ADP phosphokinase АТР At 37 °C, as it occurs in the cytosol of neurons, with phosphocreatine at 4.7 mM, creatine at 1.0 mM, ADP at 0.73 mM and ATP at 2.6 mM. HINT: AG° = 30.5 kJ/mol AG° = -43.0 kJ/mol ADP + Pi -> ATP + H,0 Phosphocreatine + H2O -> creatine + Piarrow_forwardFor this practice problem, would the answer be c)NaCl? My reasoning behind this is because molecules under 100 Da can use simple diffusion, while nonpolar molecules and larger molecules like benzene can use channels via facilitated diffusion. However, NaCl dissociates into ions and cannot readily use diffusion?arrow_forwardQ3. Péclet number - We've seen the Péclet number Pé : vl as a useful metric to determine if stirring (Pé > 1) is more efficient than diffusion (Pé < 1) for mixing solutions. "Stirring" here can designate any process which applies a force on the molecules, resulting in a velocity v. a) Show that the Péclet number, like the Reynolds number, is unitless. Let's think about why scale (l) matters for mixing. A-DNA, a DNA polymer containing 48,502 base pairs, has a diffusion coefficient of D = field of 1 V/m, we can expect 1-DNA to reach a terminal velocity of 30 nm/s. 6.4 x 10-13m²s-1. Under an electric b) Find the Péclet number for a system of dimension of l = 10 cm. This corresponds to the scale of most benchtop instruments used to manipulate or separate biomolecules.arrow_forward
- aluate and Synthesize CONNECT Explain why the proton gradient formed dur chemiosmosis represents a state of low entropy. (You may wish to refer to the discussion of entropy in Chapter 7) the ondarrow_forwardMAKE CONNECTIONS Is the flow of ions through a ligand-gated channelan example of active or passive transport? (Review Concepts 7.3 and 7.4.)arrow_forwardAsap explain wellarrow_forward
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