CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
3rd Edition
ISBN: 9780134875040
Author: Urry
Publisher: PEARSON
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Textbook Question
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
Incorrect Answer
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.
Incorrect Answer
Plsss helppp
Chapter 6 Solutions
CAMPBELL BIOLOGY IN FOCUS-W/MASTR.BIO.
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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- WHAT IF? Some membrane proteins diffuse faster in the plasma membrane when the cytoskeleton or the extracellular matrix is artificially removed than when cells are unperturbed. Explain why.arrow_forwardDemonstrate the listed processesarrow_forwardQ3 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_forward
- Model 4 - Transport Proteins: Facilitated Diffusion Extracellular Fluid mu Cytoplasmic Fluid Extracellular Fluid wwwwwwy hmmmml Cytoplasmic Fluid www.wmy wwwwwy hummu hmm wwwwwwy immmml wwwwwwwwY immu hmmmml wwwwy hmmmm O wwwwwwy wwwwwwwy imm hmmmmm Y www Y www 10. What appears to be the effect of inserting a protein channel into the membrane on the movement of molecules across the membrane? 11. Is the inner surface (facing the channel) of the embedded protein likely to be polar or nonpolar in the examples shown in Model 4? Is the exterior surface (facing the fatty acid chains of the phospholipids) of the embedded protein likely to be polar or nonpolar? Explain your reasoning. When a membrane protein assists in the passive transport of molecules across a barrier in the direction down their concentration gradient (from high concentration to low concentration) it is called facilitated diffusion. Transport proteins may also be involved in active transport where the cell uses energy from…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_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_forward
- Can u help me to explain to me every question with answer explain?arrow_forwardCan you help me to explain every question with these answer?arrow_forwardQ1: Is the dye at equilibrium in any of these glasses? Describe how the first glass will look when the dye is at equilibrium with the water. Q2: Will diffusion mix the molecules of dye evenly through the water, or is it necessary to shake the container to get a uniform mixture? Q3: Will diffusion mix the dye faster in hot water than in cold water? Why or why not?arrow_forward
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