The fluid mosaic model of the membrane describes the membrane as a. containing a significant quantity of water in the interior. b. composed of fluid phospholipids on the outside and protein on the inside. c. composed of protein on the outside and fluid phospholipids on the inside. d. made of proteins and lipids that can freely move.

Question

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Answer 1

Textbook Question

Chapter 5, Problem 1U

The fluid mosaic model of the membrane describes the membrane as

a. containing a significant quantity of water in the interior.

b. composed of fluid phospholipids on the outside and protein on the inside.

c. composed of protein on the outside and fluid phospholipids on the inside.

d. made of proteins and lipids that can freely move.

Expert Solution & Answer

Summary Introduction

Introduction:

The fluid mosaic model of plasma membrane was proposed by Singer and Nicolson. They stated that plasma membrane is a semipermeable membrane that allows only selective particles to go in and out of the cell. It is made of phospholipids and proteins, which are embedded within the lipid bilayer.

Answer to Problem 1U

Correct answer:

The fluid mosaic model describes the plasma membrane as a mosaic of proteins floating in a layer of lipids. Therefore, option d is correct.

Explanation of Solution

Reason for the correct statement

The fluid mosaic model explains that proteins are embedded within the lipid bilayer. The lipid bilayer provides fluidity and elasticity to the membrane, and it consists of transmembrane proteins floating in the lipid bilayer. It helps in transportation and communication across the membrane. The lipid bilayer also contains interior proteins that help to maintain the shape of the membrane.

Option d is given as “made of proteins and lipids that can move freely.”

As “the plasma membrane is made of phospholipids bilayer in which proteins are embedded and provides flexibility as well as helps in transportation and communication across the membrane,” option d is the right answer.

Reasons for the incorrect statements:

Option a is given as “containing a significant quantity of water in the interior.”

The plasma membrane is made of a lipid bilayer and proteins that provide stability to the membrane. So, it is a wrong answer.

Option b is given as “composed of fluid phospholipids inside and proteins outside.”

The plasma membrane is composed of phospholipids with the hydrophobic tails inside and hydrophilic heads outside, whereas intrinsic proteins are embedded in the lipid bilayer and extrinsic proteins are present outside the lipid bilayer. So, it is a wrong answer.

Option c is given as “composed of proteins on the outside and fluid phospholipids on the inside.”

The lipid bilayer is arranged in a specific manner such as its hydrophobic tail is present inside and hydrophilic head is present outside. Similarly, there are two types of proteins present in the plasma membrane: intrinsic proteins which are present inside the lipid bilayer and extrinsic proteins, which are present outside the lipid bilayer. So, it is a wrong answer.

Hence, options a, b, and c are incorrect.

Conclusion

Plasma membrane is called semipermeable membrane as it allows only selective particles to go in and out of the cell and it helps in protection of cell from several injuries. It prevents infections by blocking the entry of disease-causing microorganisms.

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Students have asked these similar questions

The plasma membrane is said to be a fluid-mosaic model because it contains a. waxes suspended within a mosaic of phospholipids.b. a mosaic of proteins suspended within a phospholipid bilayer.c. a polysaccharide mosaic suspended within a protein bilayer.d. a mosaic of phospholipids suspended within a protein bilayer.

Which of the following statements is true of membrane proteins? a) They are suspended on the surface of the membrane. b) They are partly embedded in the bilayer c) They span across the bilayer and project from both sides d) Any of these are true, depending on the specific membrane protein.

According to the fluid-mosaic model of the plasma membrane, a.protein and phospholipids form a regular, repeating structure. b.the membrane is a rigid structure. c.phospholipids form a double layer, with the polar parts facing each other. d.proteins are free to move within a double layer of phospholipids.

Answer 2

Textbook Question

Chapter 5, Problem 1U

The fluid mosaic model of the membrane describes the membrane as

a. containing a significant quantity of water in the interior.

b. composed of fluid phospholipids on the outside and protein on the inside.

c. composed of protein on the outside and fluid phospholipids on the inside.

d. made of proteins and lipids that can freely move.

Expert Solution & Answer

Summary Introduction

Introduction:

The fluid mosaic model of plasma membrane was proposed by Singer and Nicolson. They stated that plasma membrane is a semipermeable membrane that allows only selective particles to go in and out of the cell. It is made of phospholipids and proteins, which are embedded within the lipid bilayer.

Answer to Problem 1U

Correct answer:

The fluid mosaic model describes the plasma membrane as a mosaic of proteins floating in a layer of lipids. Therefore, option d is correct.

Explanation of Solution

Reason for the correct statement

The fluid mosaic model explains that proteins are embedded within the lipid bilayer. The lipid bilayer provides fluidity and elasticity to the membrane, and it consists of transmembrane proteins floating in the lipid bilayer. It helps in transportation and communication across the membrane. The lipid bilayer also contains interior proteins that help to maintain the shape of the membrane.

Option d is given as “made of proteins and lipids that can move freely.”

As “the plasma membrane is made of phospholipids bilayer in which proteins are embedded and provides flexibility as well as helps in transportation and communication across the membrane,” option d is the right answer.

Reasons for the incorrect statements:

Option a is given as “containing a significant quantity of water in the interior.”

The plasma membrane is made of a lipid bilayer and proteins that provide stability to the membrane. So, it is a wrong answer.

Option b is given as “composed of fluid phospholipids inside and proteins outside.”

The plasma membrane is composed of phospholipids with the hydrophobic tails inside and hydrophilic heads outside, whereas intrinsic proteins are embedded in the lipid bilayer and extrinsic proteins are present outside the lipid bilayer. So, it is a wrong answer.

Option c is given as “composed of proteins on the outside and fluid phospholipids on the inside.”

The lipid bilayer is arranged in a specific manner such as its hydrophobic tail is present inside and hydrophilic head is present outside. Similarly, there are two types of proteins present in the plasma membrane: intrinsic proteins which are present inside the lipid bilayer and extrinsic proteins, which are present outside the lipid bilayer. So, it is a wrong answer.

Hence, options a, b, and c are incorrect.

Conclusion

Plasma membrane is called semipermeable membrane as it allows only selective particles to go in and out of the cell and it helps in protection of cell from several injuries. It prevents infections by blocking the entry of disease-causing microorganisms.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 5, Problem 1U

The fluid mosaic model of the membrane describes the membrane as

a. containing a significant quantity of water in the interior.

b. composed of fluid phospholipids on the outside and protein on the inside.

c. composed of protein on the outside and fluid phospholipids on the inside.

d. made of proteins and lipids that can freely move.

Expert Solution & Answer

Summary Introduction

Introduction:

The fluid mosaic model of plasma membrane was proposed by Singer and Nicolson. They stated that plasma membrane is a semipermeable membrane that allows only selective particles to go in and out of the cell. It is made of phospholipids and proteins, which are embedded within the lipid bilayer.

Answer to Problem 1U

Correct answer:

The fluid mosaic model describes the plasma membrane as a mosaic of proteins floating in a layer of lipids. Therefore, option d is correct.

Explanation of Solution

Reason for the correct statement

The fluid mosaic model explains that proteins are embedded within the lipid bilayer. The lipid bilayer provides fluidity and elasticity to the membrane, and it consists of transmembrane proteins floating in the lipid bilayer. It helps in transportation and communication across the membrane. The lipid bilayer also contains interior proteins that help to maintain the shape of the membrane.

Option d is given as “made of proteins and lipids that can move freely.”

As “the plasma membrane is made of phospholipids bilayer in which proteins are embedded and provides flexibility as well as helps in transportation and communication across the membrane,” option d is the right answer.

Reasons for the incorrect statements:

Option a is given as “containing a significant quantity of water in the interior.”

The plasma membrane is made of a lipid bilayer and proteins that provide stability to the membrane. So, it is a wrong answer.

Option b is given as “composed of fluid phospholipids inside and proteins outside.”

The plasma membrane is composed of phospholipids with the hydrophobic tails inside and hydrophilic heads outside, whereas intrinsic proteins are embedded in the lipid bilayer and extrinsic proteins are present outside the lipid bilayer. So, it is a wrong answer.

Option c is given as “composed of proteins on the outside and fluid phospholipids on the inside.”

The lipid bilayer is arranged in a specific manner such as its hydrophobic tail is present inside and hydrophilic head is present outside. Similarly, there are two types of proteins present in the plasma membrane: intrinsic proteins which are present inside the lipid bilayer and extrinsic proteins, which are present outside the lipid bilayer. So, it is a wrong answer.

Hence, options a, b, and c are incorrect.

Conclusion

Plasma membrane is called semipermeable membrane as it allows only selective particles to go in and out of the cell and it helps in protection of cell from several injuries. It prevents infections by blocking the entry of disease-causing microorganisms.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 5, Problem 1U

The fluid mosaic model of the membrane describes the membrane as

a. containing a significant quantity of water in the interior.

b. composed of fluid phospholipids on the outside and protein on the inside.

c. composed of protein on the outside and fluid phospholipids on the inside.

d. made of proteins and lipids that can freely move.

Expert Solution & Answer

Summary Introduction

Introduction:

The fluid mosaic model of plasma membrane was proposed by Singer and Nicolson. They stated that plasma membrane is a semipermeable membrane that allows only selective particles to go in and out of the cell. It is made of phospholipids and proteins, which are embedded within the lipid bilayer.

Answer to Problem 1U

Correct answer:

The fluid mosaic model describes the plasma membrane as a mosaic of proteins floating in a layer of lipids. Therefore, option d is correct.

Explanation of Solution

Reason for the correct statement

The fluid mosaic model explains that proteins are embedded within the lipid bilayer. The lipid bilayer provides fluidity and elasticity to the membrane, and it consists of transmembrane proteins floating in the lipid bilayer. It helps in transportation and communication across the membrane. The lipid bilayer also contains interior proteins that help to maintain the shape of the membrane.

Option d is given as “made of proteins and lipids that can move freely.”

As “the plasma membrane is made of phospholipids bilayer in which proteins are embedded and provides flexibility as well as helps in transportation and communication across the membrane,” option d is the right answer.

Reasons for the incorrect statements:

Option a is given as “containing a significant quantity of water in the interior.”

The plasma membrane is made of a lipid bilayer and proteins that provide stability to the membrane. So, it is a wrong answer.

Option b is given as “composed of fluid phospholipids inside and proteins outside.”

The plasma membrane is composed of phospholipids with the hydrophobic tails inside and hydrophilic heads outside, whereas intrinsic proteins are embedded in the lipid bilayer and extrinsic proteins are present outside the lipid bilayer. So, it is a wrong answer.

Option c is given as “composed of proteins on the outside and fluid phospholipids on the inside.”

The lipid bilayer is arranged in a specific manner such as its hydrophobic tail is present inside and hydrophilic head is present outside. Similarly, there are two types of proteins present in the plasma membrane: intrinsic proteins which are present inside the lipid bilayer and extrinsic proteins, which are present outside the lipid bilayer. So, it is a wrong answer.

Hence, options a, b, and c are incorrect.

Conclusion

Plasma membrane is called semipermeable membrane as it allows only selective particles to go in and out of the cell and it helps in protection of cell from several injuries. It prevents infections by blocking the entry of disease-causing microorganisms.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction:

The fluid mosaic model of plasma membrane was proposed by Singer and Nicolson. They stated that plasma membrane is a semipermeable membrane that allows only selective particles to go in and out of the cell. It is made of phospholipids and proteins, which are embedded within the lipid bilayer.

Answer to Problem 1U

Correct answer:

The fluid mosaic model describes the plasma membrane as a mosaic of proteins floating in a layer of lipids. Therefore, option d is correct.

Explanation of Solution

Reason for the correct statement

The fluid mosaic model explains that proteins are embedded within the lipid bilayer. The lipid bilayer provides fluidity and elasticity to the membrane, and it consists of transmembrane proteins floating in the lipid bilayer. It helps in transportation and communication across the membrane. The lipid bilayer also contains interior proteins that help to maintain the shape of the membrane.

Option d is given as “made of proteins and lipids that can move freely.”

As “the plasma membrane is made of phospholipids bilayer in which proteins are embedded and provides flexibility as well as helps in transportation and communication across the membrane,” option d is the right answer.

Reasons for the incorrect statements:

Option a is given as “containing a significant quantity of water in the interior.”

The plasma membrane is made of a lipid bilayer and proteins that provide stability to the membrane. So, it is a wrong answer.

Option b is given as “composed of fluid phospholipids inside and proteins outside.”

The plasma membrane is composed of phospholipids with the hydrophobic tails inside and hydrophilic heads outside, whereas intrinsic proteins are embedded in the lipid bilayer and extrinsic proteins are present outside the lipid bilayer. So, it is a wrong answer.

Option c is given as “composed of proteins on the outside and fluid phospholipids on the inside.”

The lipid bilayer is arranged in a specific manner such as its hydrophobic tail is present inside and hydrophilic head is present outside. Similarly, there are two types of proteins present in the plasma membrane: intrinsic proteins which are present inside the lipid bilayer and extrinsic proteins, which are present outside the lipid bilayer. So, it is a wrong answer.

Hence, options a, b, and c are incorrect.

Conclusion

Plasma membrane is called semipermeable membrane as it allows only selective particles to go in and out of the cell and it helps in protection of cell from several injuries. It prevents infections by blocking the entry of disease-causing microorganisms.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

The fluid mosaic model of plasma membrane was proposed by Singer and Nicolson. They stated that plasma membrane is a semipermeable membrane that allows only selective particles to go in and out of the cell. It is made of phospholipids and proteins, which are embedded within the lipid bilayer.

Answer to Problem 1U

Correct answer:

The fluid mosaic model describes the plasma membrane as a mosaic of proteins floating in a layer of lipids. Therefore, option d is correct.

Explanation of Solution

Reason for the correct statement

The fluid mosaic model explains that proteins are embedded within the lipid bilayer. The lipid bilayer provides fluidity and elasticity to the membrane, and it consists of transmembrane proteins floating in the lipid bilayer. It helps in transportation and communication across the membrane. The lipid bilayer also contains interior proteins that help to maintain the shape of the membrane.

Option d is given as “made of proteins and lipids that can move freely.”

As “the plasma membrane is made of phospholipids bilayer in which proteins are embedded and provides flexibility as well as helps in transportation and communication across the membrane,” option d is the right answer.

Reasons for the incorrect statements:

Option a is given as “containing a significant quantity of water in the interior.”

The plasma membrane is made of a lipid bilayer and proteins that provide stability to the membrane. So, it is a wrong answer.

Option b is given as “composed of fluid phospholipids inside and proteins outside.”

The plasma membrane is composed of phospholipids with the hydrophobic tails inside and hydrophilic heads outside, whereas intrinsic proteins are embedded in the lipid bilayer and extrinsic proteins are present outside the lipid bilayer. So, it is a wrong answer.

Option c is given as “composed of proteins on the outside and fluid phospholipids on the inside.”

The lipid bilayer is arranged in a specific manner such as its hydrophobic tail is present inside and hydrophilic head is present outside. Similarly, there are two types of proteins present in the plasma membrane: intrinsic proteins which are present inside the lipid bilayer and extrinsic proteins, which are present outside the lipid bilayer. So, it is a wrong answer.

Hence, options a, b, and c are incorrect.

Conclusion

Plasma membrane is called semipermeable membrane as it allows only selective particles to go in and out of the cell and it helps in protection of cell from several injuries. It prevents infections by blocking the entry of disease-causing microorganisms.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

The fluid mosaic model of plasma membrane was proposed by Singer and Nicolson. They stated that plasma membrane is a semipermeable membrane that allows only selective particles to go in and out of the cell. It is made of phospholipids and proteins, which are embedded within the lipid bilayer.

Answer 12

Answer to Problem 1U

Correct answer:

The fluid mosaic model describes the plasma membrane as a mosaic of proteins floating in a layer of lipids. Therefore, option d is correct.

Answer 13

Explanation of Solution

Reason for the correct statement

The fluid mosaic model explains that proteins are embedded within the lipid bilayer. The lipid bilayer provides fluidity and elasticity to the membrane, and it consists of transmembrane proteins floating in the lipid bilayer. It helps in transportation and communication across the membrane. The lipid bilayer also contains interior proteins that help to maintain the shape of the membrane.

Option d is given as “made of proteins and lipids that can move freely.”

As “the plasma membrane is made of phospholipids bilayer in which proteins are embedded and provides flexibility as well as helps in transportation and communication across the membrane,” option d is the right answer.

Reasons for the incorrect statements:

Option a is given as “containing a significant quantity of water in the interior.”

The plasma membrane is made of a lipid bilayer and proteins that provide stability to the membrane. So, it is a wrong answer.

Option b is given as “composed of fluid phospholipids inside and proteins outside.”

The plasma membrane is composed of phospholipids with the hydrophobic tails inside and hydrophilic heads outside, whereas intrinsic proteins are embedded in the lipid bilayer and extrinsic proteins are present outside the lipid bilayer. So, it is a wrong answer.

Option c is given as “composed of proteins on the outside and fluid phospholipids on the inside.”

The lipid bilayer is arranged in a specific manner such as its hydrophobic tail is present inside and hydrophilic head is present outside. Similarly, there are two types of proteins present in the plasma membrane: intrinsic proteins which are present inside the lipid bilayer and extrinsic proteins, which are present outside the lipid bilayer. So, it is a wrong answer.

Hence, options a, b, and c are incorrect.

Answer 14

Conclusion

Plasma membrane is called semipermeable membrane as it allows only selective particles to go in and out of the cell and it helps in protection of cell from several injuries. It prevents infections by blocking the entry of disease-causing microorganisms.

Answer 15

Ch. 5 - The fluid mosaic model of the membrane describes...Ch. 5 - What chemical property characterizes the interior...Ch. 5 - The transmembrane domain of an integral membrane...Ch. 5 - The specific function of a membrane within a cell...Ch. 5 - The movement of water across a membrane is...Ch. 5 - If a cell is in an isotonic environment, then a....Ch. 5 - Which of the following is NOT a mechanism for...Ch. 5 - A bacterial cell that can alter the composition of...Ch. 5 - What variable(s) influence(s) whether a nonpolar...Ch. 5 - Which of the following does NOT contribute to the...

Solution Summary: The author explains that the fluid mosaic model of plasma membrane was proposed by Singer and Nicolson.

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