To examine: Whether the statement, “Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane”, is true or false. Introduction: Lipid bilayer is the basic structure of the plasma membrane that consists of two leaflets of amphipathic lipid molecules. The polar head group of lipids that are in contact with the aqueous medium is called hydrophilic unit, and the non-polar tails that point toward the interior of the membrane is called hydrophobic unit.

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Answer 1

Question

Chapter 10, Problem 1P

44322-10-1P

Summary Introduction

To examine: Whether the statement, “Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane”, is true or false.

Introduction: Lipid bilayer is the basic structure of the plasma membrane that consists of two leaflets of amphipathic lipid molecules. The polar head group of lipids that are in contact with the aqueous medium is called hydrophilic unit, and the non-polar tails that point toward the interior of the membrane is called hydrophobic unit.

Expert Solution & Answer

Answer to Problem 1P

Correct answer: The statement is true.

Explanation of Solution

The lipid molecules in a lipid bilayer do not flip-flop due to their extensive polar regions that allow the membrane to retain in asymmetry. The phospholipid translocators are the membrane-bound enzymes that catalyze the rapid flip-flop of phospholipid from one monolayer to another monolayer present in the membrane. Hence, the statement is true.

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Q8. A researcher wants to study the effectiveness of a pill intended to reduce stomach heartburn in pregnant women. The researcher chooses randomly 400 women to participate in this experiment for 9 months of their pregnancy period. They all need to have the same diet. The researcher designs two groups of 200 participants: One group take the real medication intended to reduce heartburn, while the other group take placebo medication. In this study what are: Independent variable: Dependent variable: Control variable: Experimental group: " Control group: If the participants do not know who is consuming the real pills and who is consuming the sugar pills. This study is It happens that 40% of the participants do not find the treatment helpful and drop out after 6 months. The researcher throws out the data from subjects that drop out. What type of bias is there in this study? If the company who makes the medication funds this research, what type of bias might exist in this research work?

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Answer 2

Question

Chapter 10, Problem 1P

44322-10-1P

Summary Introduction

To examine: Whether the statement, “Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane”, is true or false.

Introduction: Lipid bilayer is the basic structure of the plasma membrane that consists of two leaflets of amphipathic lipid molecules. The polar head group of lipids that are in contact with the aqueous medium is called hydrophilic unit, and the non-polar tails that point toward the interior of the membrane is called hydrophobic unit.

Expert Solution & Answer

Answer to Problem 1P

Correct answer: The statement is true.

Explanation of Solution

The lipid molecules in a lipid bilayer do not flip-flop due to their extensive polar regions that allow the membrane to retain in asymmetry. The phospholipid translocators are the membrane-bound enzymes that catalyze the rapid flip-flop of phospholipid from one monolayer to another monolayer present in the membrane. Hence, the statement is true.

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Answer 3

Question

Chapter 10, Problem 1P

44322-10-1P

Summary Introduction

To examine: Whether the statement, “Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane”, is true or false.

Introduction: Lipid bilayer is the basic structure of the plasma membrane that consists of two leaflets of amphipathic lipid molecules. The polar head group of lipids that are in contact with the aqueous medium is called hydrophilic unit, and the non-polar tails that point toward the interior of the membrane is called hydrophobic unit.

Expert Solution & Answer

Answer to Problem 1P

Correct answer: The statement is true.

Explanation of Solution

The lipid molecules in a lipid bilayer do not flip-flop due to their extensive polar regions that allow the membrane to retain in asymmetry. The phospholipid translocators are the membrane-bound enzymes that catalyze the rapid flip-flop of phospholipid from one monolayer to another monolayer present in the membrane. Hence, the statement is true.

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Answer 4

Question

Chapter 10, Problem 1P

44322-10-1P

Summary Introduction

To examine: Whether the statement, “Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane”, is true or false.

Introduction: Lipid bilayer is the basic structure of the plasma membrane that consists of two leaflets of amphipathic lipid molecules. The polar head group of lipids that are in contact with the aqueous medium is called hydrophilic unit, and the non-polar tails that point toward the interior of the membrane is called hydrophobic unit.

Expert Solution & Answer

Answer to Problem 1P

Correct answer: The statement is true.

Explanation of Solution

The lipid molecules in a lipid bilayer do not flip-flop due to their extensive polar regions that allow the membrane to retain in asymmetry. The phospholipid translocators are the membrane-bound enzymes that catalyze the rapid flip-flop of phospholipid from one monolayer to another monolayer present in the membrane. Hence, the statement is true.

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Answer 5

Chapter 10, Problem 1P

44322-10-1P

Summary Introduction

To examine: Whether the statement, “Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane”, is true or false.

Introduction: Lipid bilayer is the basic structure of the plasma membrane that consists of two leaflets of amphipathic lipid molecules. The polar head group of lipids that are in contact with the aqueous medium is called hydrophilic unit, and the non-polar tails that point toward the interior of the membrane is called hydrophobic unit.

Expert Solution & Answer

Answer to Problem 1P

Correct answer: The statement is true.

Explanation of Solution

The lipid molecules in a lipid bilayer do not flip-flop due to their extensive polar regions that allow the membrane to retain in asymmetry. The phospholipid translocators are the membrane-bound enzymes that catalyze the rapid flip-flop of phospholipid from one monolayer to another monolayer present in the membrane. Hence, the statement is true.

Answer 6

Chapter 10, Problem 1P

44322-10-1P

Summary Introduction

To examine: Whether the statement, “Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane”, is true or false.

Introduction: Lipid bilayer is the basic structure of the plasma membrane that consists of two leaflets of amphipathic lipid molecules. The polar head group of lipids that are in contact with the aqueous medium is called hydrophilic unit, and the non-polar tails that point toward the interior of the membrane is called hydrophobic unit.

Expert Solution & Answer

Answer to Problem 1P

Correct answer: The statement is true.

Explanation of Solution

The lipid molecules in a lipid bilayer do not flip-flop due to their extensive polar regions that allow the membrane to retain in asymmetry. The phospholipid translocators are the membrane-bound enzymes that catalyze the rapid flip-flop of phospholipid from one monolayer to another monolayer present in the membrane. Hence, the statement is true.

Answer 7

Chapter 10, Problem 1P

44322-10-1P

Summary Introduction

To examine: Whether the statement, “Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane”, is true or false.

Introduction: Lipid bilayer is the basic structure of the plasma membrane that consists of two leaflets of amphipathic lipid molecules. The polar head group of lipids that are in contact with the aqueous medium is called hydrophilic unit, and the non-polar tails that point toward the interior of the membrane is called hydrophobic unit.

Answer 8

Expert Solution & Answer

Answer to Problem 1P

Correct answer: The statement is true.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

The lipid molecules in a lipid bilayer do not flip-flop due to their extensive polar regions that allow the membrane to retain in asymmetry. The phospholipid translocators are the membrane-bound enzymes that catalyze the rapid flip-flop of phospholipid from one monolayer to another monolayer present in the membrane. Hence, the statement is true.

Answer 12

Ch. 10 - Prob. 1P Ch. 10 - Prob. 2P Ch. 10 - Prob. 3P Ch. 10 - Prob. 4P Ch. 10 - Prob. 5P Ch. 10 - Prob. 6P Ch. 10 - Prob. 7P Ch. 10 - Prob. 8P Ch. 10 - Prob. 9P Ch. 10 - Prob. 10P

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Answer to Problem 1P

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