Campbell Biology in Focus
Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Chapter 5, Problem 1TYU

In what way do the membranes of a eukaryotic cell vary?

  1. A.    Phospholipids are found only in certain membranes.
  2. B.     Certain proteins are unique to each kind of membrane.
  3. C.     Only certain membranes of the cell are selectively permeable.
  4. D.    Only certain membranes are constructed from amphipathic molecules.
Expert Solution & Answer
Check Mark
Summary Introduction

Introduction:

The lipid bilayer model of the membrane consists of proteins and lipids with triacylglycerols. This structure maintains the fluidity of membrane. Various phospholipids are present in the membrane. They consist of a hydrophilic head and a hydrophobic tail. The presence of the lipid cholesterol provides flexibility to the membrane at various temperatures. Various unique proteins are present in the membrane like cell signaling proteins and growth receptors.

Answer to Problem 1TYU

Correct answer:

The membrane is unique and consists of lipids and proteins. The proteins present in the membrane are specific and form an essential part of cell signaling and growth receptor signaling response. Therefore, option (B) is correct.

Explanation of Solution

Reason for the correct statement:

The membrane of the cells contains unique proteins. The proteins are present in the membrane are specific and help in the signaling inside the cells by the activation of the protein growth factor receptors.

Option (B) is given as “Certain proteins are unique to each kind of membrane”.

As, “the proteins present in the membrane of a eukaryotic cell are unique and perform specific functions according to the type of proteins present in the cell”, it is the right answer.

Hence, option (B) is correct.

Reasons for the incorrect statements:

Option (A) is given as “Phospholipids are found only in certain membranes”. Phospholipids are present in the membranes, but the proteins present in the membrane are unique, specific and diverse. So, it is the wrong answer.

Option (C) is given as “Only certain membranes of the cell are selectively permeable”.  The cell membranes are selectively permeable to the movement of the various solutes like glucose and ions, which cross the membrane across the protein channels. They are unique and specific to the membrane. So, it is a wrong answer.

Option (D) is given as “Only certain membranes are constructed from amphipathic molecules”.

The membrane molecules are amphipathic, but the proteins formed in the membrane are specific and unique. So, it is a wrong answer.

Hence, options (A), (C), and (D) are incorrect.

Conclusion

The proteins present in the membrane are unique, specific and are of various types. These include the cell signaling proteins, growth factor receptor proteins, post-translationally modified proteins, blood group proteins, and cluster of differentiation receptor proteins.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
03:33
Students have asked these similar questions
Answer the Guide Question: a) Each cell in an organism has all of the basic parts. Each has a function that benefits the other cells, how might the presence of different cell structures in plant and animal help them perform their functions as an organism. Explain. b) Why is the cell membrane considered as the guard of the cell? c) Why is the lysosome considered as the suicide bag of the cell?
Which is not true of Eukaryotic cells? A) A true nucleus contains DNA in the form of chromosomes B) Eukaryotic cells contain membrane-bounded compartments or organelles C) Their Dna employs a nucleoid area to produce proteins D) Thye all contain mitochondria  E) They contain specialized organelles in the cytoplasm Explain why
What characteristic of mitochondria and chloroplasts makes themdifferent from other organelles and suggests they were onceindependent organisms?a. They have a specialized function in the cell.b. They are surrounded by a membrane.c. They contain enzymes.d. They have their own DNA and ribosomes.

Chapter 5 Solutions

Campbell Biology in Focus

Knowledge Booster
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
    • SEE MORE QUESTIONS
    Recommended textbooks for you
  • Concepts of Biology
    Biology
    ISBN:9781938168116
    Author:Samantha Fowler, Rebecca Roush, James Wise
    Publisher:OpenStax College
  • Concepts of Biology
    Biology
    ISBN:9781938168116
    Author:Samantha Fowler, Rebecca Roush, James Wise
    Publisher:OpenStax College
    Biology - Intro to Cell Structure - Quick Review!; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=vwAJ8ByQH2U;License: Standard youtube license