You are studying the effects oftemperature and lipid composition onmembrane fluidity using artificialmembranes containing only one or a fewkinds of lipids and no proteins. Assumethat you and your lab partner have madethe following artificial membranes:Membrane 1: Made entirely ofphosphatidylethanolamine. Each of thetwo chains of the fatty acids is 18 carbonin length and both are completelysaturated.Membrane 2: Made entirely ofphosphatidylethanolamine with 14-carbonfatty acid chains. only one fatty acid tailcontains a double bond, the other one iscompletely saturated.Membrane 3: Made entirely ofphosphatidylethanolamine with 14-carbonfatty acid chains. Both fatty acid tails havea single double bond.Predict the transition temperature of theabove-mentioned membranes. MembraneMembrane 3: 62°C1: 2°C Membrane 2: 19°C,O It can't be predicted from the dataprovided.Membrane 1: 19°C Membrane 2: 62°C,Membrane 3: 2°CMembrane 1: 62°C Membrane 2: 2°C,Membrane 3: 19°CMembrane 1: 62°C Membrane 2: 19°C,Membrane 3: 2°C

Answered: You are studying the effects of…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

You are studying the effects of
temperature and lipid composition on
membrane fluidity using artificial
membranes containing only one or a few
kinds of lipids and no proteins. Assume
that you and your lab partner have made
the following artificial membranes:
Membrane 1: Made entirely of
phosphatidylethanolamine. Each of the
two chains of the fatty acids is 18 carbon
in length and both are completely
saturated.
Membrane 2: Made entirely of
phosphatidylethanolamine with 14-carbon
fatty acid chains. only one fatty acid tail
contains a double bond, the other one is
completely saturated.
Membrane 3: Made entirely of
phosphatidylethanolamine with 14-carbon
fatty acid chains. Both fatty acid tails have
a single double bond.
Predict the transition temperature of the
above-mentioned membranes.

Membrane
Membrane 3: 62°C
1: 2°C Membrane 2: 19°C,
O It can't be predicted from the data
provided.
Membrane 1: 19°C Membrane 2: 62°C,
Membrane 3: 2°C
Membrane 1: 62°C Membrane 2: 2°C,
Membrane 3: 19°C
Membrane 1: 62°C Membrane 2: 19°C,
Membrane 3: 2°C

Expert Solution

Step 1: Introduction

The cell membrane, also known as the plasma membrane, is a thin, flexible barrier that surrounds the outer boundary of all cells. It separates the cell's interior from the external environment and controls the passage of substances in and out of the cell. The cell membrane is primarily composed of lipids (phospholipids), proteins, and carbohydrates, arranged in a bilayer structure. It plays a vital role in maintaining cell integrity, communication, and regulating the transport of molecules, allowing cells to function properly and adapt to their surroundings.

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