Whether ethanol is likely to cross a membrane by mediated or non-mediated transport. Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. Some membrane permeable substance can cross the membrane, but some substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

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Answer 1

Question

Chapter 10, Problem 5E

(a)

Summary Introduction

To identify: Whether ethanol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. Some membrane permeable substance can cross the membrane, but some substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(b)

Summary Introduction

To identify: Whether glycine is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(c)

Summary Introduction

To identify: Whether cholesterol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffuse directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(d)

Summary Introduction

To identify: Whether ATP is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

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Answer 2

Question

Chapter 10, Problem 5E

(a)

Summary Introduction

To identify: Whether ethanol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. Some membrane permeable substance can cross the membrane, but some substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(b)

Summary Introduction

To identify: Whether glycine is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(c)

Summary Introduction

To identify: Whether cholesterol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffuse directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(d)

Summary Introduction

To identify: Whether ATP is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

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Answer 3

Question

Chapter 10, Problem 5E

(a)

Summary Introduction

To identify: Whether ethanol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. Some membrane permeable substance can cross the membrane, but some substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(b)

Summary Introduction

To identify: Whether glycine is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(c)

Summary Introduction

To identify: Whether cholesterol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffuse directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(d)

Summary Introduction

To identify: Whether ATP is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

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Answer 4

Question

Chapter 10, Problem 5E

(a)

Summary Introduction

To identify: Whether ethanol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. Some membrane permeable substance can cross the membrane, but some substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(b)

Summary Introduction

To identify: Whether glycine is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(c)

Summary Introduction

To identify: Whether cholesterol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffuse directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(d)

Summary Introduction

To identify: Whether ATP is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

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Answer 5

Chapter 10, Problem 5E

(a)

Summary Introduction

To identify: Whether ethanol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. Some membrane permeable substance can cross the membrane, but some substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(b)

Summary Introduction

To identify: Whether glycine is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(c)

Summary Introduction

To identify: Whether cholesterol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffuse directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

(d)

Summary Introduction

To identify: Whether ATP is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 6

Chapter 10, Problem 5E

(a)

Summary Introduction

To identify: Whether ethanol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. Some membrane permeable substance can cross the membrane, but some substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 7

Chapter 10, Problem 5E

(a)

Summary Introduction

To identify: Whether ethanol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. Some membrane permeable substance can cross the membrane, but some substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 8

(b)

Summary Introduction

To identify: Whether glycine is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 9

(b)

Summary Introduction

To identify: Whether glycine is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 10

(c)

Summary Introduction

To identify: Whether cholesterol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffuse directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 11

(c)

Summary Introduction

To identify: Whether cholesterol is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane, and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffuse directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 12

(d)

Summary Introduction

To identify: Whether ATP is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 13

(d)

Summary Introduction

To identify: Whether ATP is likely to cross a membrane by mediated or non-mediated transport.

Concept introduction: The free energy change for moving a substance across a membrane depends upon the concentrations on both sides of the membrane and in case of ions, free energy change depends upon the membrane potential. A substance cannot be diffused directly across a membrane; it needs some protein-based mediator to move across the plasma membrane of the cell. Non-mediated transport is the process of simple diffusion. Mediated transport is constituted through the action of definite carrier protein molecules.

Answer 14

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Answer 15

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Answer 16

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Answer 17

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