What functions of a membrane would be compromised if the membrane consisted of a phospholipid bilayer...
What functions of a membrane would be compromised if the membrane consisted of a phospholipid bilayer without proteins? Give at least 3 specific examples.
Homework Answers
Membrane proteins are the nanomachines that enable membranes to send and receive messages and to transport molecules into and out of cells and compartments.
i) Without membrane proteins the phospholipid membrane would work as an impenetrable barrier and cells would be unable to communicate with their neighbours, transport nutrients into the cell or waste products out of it, or respond to external stimuli.
ii)The membrane proteins that are present in a particular membrane determine the substances to which it will be permeable and what signal molecules it can recognize.
iii) Membrane proteins of adjacent cells hook together to form various junctions.
All these function of the membrane would be compromised if the membrane consisted of a phospholipid bilayer without proteins.
Add Answer to:
What functions of a membrane would be compromised if the
membrane consisted of a phospholipid bilayer...
1. What is NOT TRUE regarding a phospholipid bilayer? A. The two leaflets of the bilayer...
1. What is NOT TRUE regarding a phospholipid bilayer? A. The two leaflets of the bilayer are identical. B. It takes energy to flip one phospholipid from one side to the other C. In animal cells cholesterol is inserted into the bilayer D. The bilayer can contain more than one type of phospholipid. 2. New membrane is made and assembled in the ___ and delivered to the plasma membrane in vesicles derived from the _. A. Cytosol; ER B. Cytosol;...
3 nate 0 Some proteins are embedded in the nonpolar phospholipid bilayer of a cell membrane....
3 nate 0 Some proteins are embedded in the nonpolar phospholipid bilayer of a cell membrane. How would you expect the three-dimensional structures of these proteins to differ from phycocyanin and other water-soluble proteinse 7 Determine whether each statement below is true or false. Explain your reasoning. a. Two different proteins may be generated from the same number and type of amino acids. True False b. Enzymes that break down proteins into their constituent amino acids catalyze the process of...
Double layer (bilayer) of phospholipid molecules Transmembrane Phospholipid bilayer protein Integral proteins Peripheral proteins Cytoplasmic side...
Double layer (bilayer) of phospholipid molecules Transmembrane Phospholipid bilayer protein Integral proteins Peripheral proteins Cytoplasmic side of membrane Cholesterol molecules Hydrophobic fatty acid "tail" Hydrophilic phosphate "head Figure 3-2 Structures of the Cell Membrane Questions 4. Match the cellular components in column A with the descriptions in column B. Place the letter of your choice in the space provided. Column A a. Chromatin b. Cytoplasm c. Endoplasmic reticulum d. Golgi apparatus e. Lysosome f. Microtubule g. Mitochondrion h. Nuclear envelope...
Question 10 Why is the plasma membrane called a 'bilayer"? There are two opposing layers of...
Question 10 Why is the plasma membrane called a 'bilayer"? There are two opposing layers of phospholipid in the membrane Thereare two opposing layers of proteins in the membrane None of the above are correct there are two opposing layers of cholesterol in the membre Question 11 Which part of a phospholipid is non polar? the oldes proteins cholesterol the photo bead Question 12 Which lilar organelle bound by a membrane? O theoBody therandosmic reticulam G L
53. Many environmental bacteria have an internal highly-folded phospholipid bilayer that serves as a. Primary membrane...
53. Many environmental bacteria have an internal highly-folded phospholipid bilayer that serves as a. Primary membrane in a secondary endosymbiont b. site for metabolic enzymes C. Shield against phages
A cell membrane consists of a lipid bilayer, which is a double layer of phospholipids. Each...
A cell membrane consists of a lipid bilayer, which is a double layer of phospholipids. Each phospholipid has a hydrophilic phosphate head and a hydrophobic lipid tail. These phospholipids are not chemically bound to one another, but rather maintain their structure due to the fact that the lipid tails do not like water. They're hydrophobic^2. If they all buddy up, then they can all stay dry. (See figure.) One way to deal with this quantitatively is to realize that there...
The plasma membrane of E. coli is approximately 75% protein and 25% phospholipid by weight. It...
The plasma membrane of E. coli is approximately 75% protein and 25% phospholipid by weight. It is known that the average membrane protein molecular weight is 50,000 Da and an average membrane phospholipid molecular weight is 750 Da. Calculate the number of membrane phospholipid molecules present per molecule of membrane protein number of membrane phospholipid molecules: 0.033 molecules Select the additional information that one would need to calculate the fraction of membrane surface covered by phospholipids. the average cross-sectional areas...
Shown is a phospholipid bilayer with Na+ on each side. What direction will the Na+ move?...
Shown is a phospholipid bilayer with Na+ on each side. What
direction will the Na+ move?
A. A to B
B. B to A
C. Both directions
D. It can't move across the bilayer
What bond or interaction are responsible for the intergration of integral proteins into the phospholipid layer?...
What bond or interaction are responsible for the intergration of
integral proteins into the phospholipid layer?
What bond or interaction are responsible for the association of
peripheral proteins with the phospholipid bilayer?
What bond or interaction are responsible for anchoring proteins
to the phospholipid bilayer?
What sort of R-groups do you expect to find in these regions of
the protein? Why?
What sort of R-groups do you expect to find in these regions of the protein? Why? Outside of cell...
discuss the functions of various lipid molecules. explain how a lipid bilayer forms, the functions that...
discuss the functions of various lipid molecules. explain how a lipid bilayer forms, the functions that it serves, and the variability in its structure Identify the different types of membrane proteins (integral, peripheral linked and associated) and how they associate with the lipid bilayer. identify the secondary structural features of proteins that allow them to associate with the lipid bilayer TE k Explain why a plot of velocity versus substrate concentration is curved. define reaction orders and their relationship to...
3 nate 0 Some proteins are embedded in the nonpolar phospholipid bilayer of a cell membrane. How would you expect the three-dimensional structures of these proteins to differ from phycocyanin and other water-soluble proteinse 7 Determine whether each statement below is true or false. Explain your reasoning. a. Two different proteins may be generated from the same number and type of amino acids. True False b. Enzymes that break down proteins into their constituent amino acids catalyze the process of...
Double layer (bilayer) of phospholipid molecules Transmembrane Phospholipid bilayer protein Integral proteins Peripheral proteins Cytoplasmic side of membrane Cholesterol molecules Hydrophobic fatty acid "tail" Hydrophilic phosphate "head Figure 3-2 Structures of the Cell Membrane Questions 4. Match the cellular components in column A with the descriptions in column B. Place the letter of your choice in the space provided. Column A a. Chromatin b. Cytoplasm c. Endoplasmic reticulum d. Golgi apparatus e. Lysosome f. Microtubule g. Mitochondrion h. Nuclear envelope...
Question 10 Why is the plasma membrane called a 'bilayer"? There are two opposing layers of phospholipid in the membrane Thereare two opposing layers of proteins in the membrane None of the above are correct there are two opposing layers of cholesterol in the membre Question 11 Which part of a phospholipid is non polar? the oldes proteins cholesterol the photo bead Question 12 Which lilar organelle bound by a membrane? O theoBody therandosmic reticulam G L
53. Many environmental bacteria have an internal highly-folded phospholipid bilayer that serves as a. Primary membrane in a secondary endosymbiont b. site for metabolic enzymes C. Shield against phages
A cell membrane consists of a lipid bilayer, which is a double layer of phospholipids. Each phospholipid has a hydrophilic phosphate head and a hydrophobic lipid tail. These phospholipids are not chemically bound to one another, but rather maintain their structure due to the fact that the lipid tails do not like water. They're hydrophobic^2. If they all buddy up, then they can all stay dry. (See figure.) One way to deal with this quantitatively is to realize that there...
The plasma membrane of E. coli is approximately 75% protein and 25% phospholipid by weight. It is known that the average membrane protein molecular weight is 50,000 Da and an average membrane phospholipid molecular weight is 750 Da. Calculate the number of membrane phospholipid molecules present per molecule of membrane protein number of membrane phospholipid molecules: 0.033 molecules Select the additional information that one would need to calculate the fraction of membrane surface covered by phospholipids. the average cross-sectional areas...
Shown is a phospholipid bilayer with Na+ on each side. What
direction will the Na+ move?
A. A to B
B. B to A
C. Both directions
D. It can't move across the bilayer
What bond or interaction are responsible for the intergration of
integral proteins into the phospholipid layer?
What bond or interaction are responsible for the association of
peripheral proteins with the phospholipid bilayer?
What bond or interaction are responsible for anchoring proteins
to the phospholipid bilayer?
What sort of R-groups do you expect to find in these regions of
the protein? Why?
What sort of R-groups do you expect to find in these regions of the protein? Why? Outside of cell...
discuss the functions of various lipid molecules. explain how a lipid bilayer forms, the functions that it serves, and the variability in its structure Identify the different types of membrane proteins (integral, peripheral linked and associated) and how they associate with the lipid bilayer. identify the secondary structural features of proteins that allow them to associate with the lipid bilayer TE k Explain why a plot of velocity versus substrate concentration is curved. define reaction orders and their relationship to...
Most questions answered within 3 hours.
-
In a 1999-2000 NHANES report, researchers estimated that 64
percent of U.S. adults ages 20-74 were...
asked 29 seconds from now -
A resistance R and a 0.5H inductance are in series
across a 57Hz ac voltage. The...
asked 5 minutes ago -
Chapter 3:
Critical Thinking Question 10: Give examples of active and
passive voice. Explain when each...
asked 10 minutes ago -
reason why u pick that choice
1. an adolescent who is currently exploring different options
for...
asked 11 minutes ago -
Burns Company's 2019 and 2018 balance sheet presented the
following data for equipment. Equipment 12/31/2019 $325,000...
asked 14 minutes ago -
List one example of each: one micro and one macro perspective of an
institution from a...
asked 29 minutes ago -
Which type of memory management divides memory into unequally
sized blocks (multiple choices may or may...
asked 30 minutes ago -
1) In the mechanism for peptide bond formation, what acts as the
initial electrophile?
2) Consider...
asked 40 minutes ago -
Can you explain step by step.
Assume that we want to construct a confidence interval. Do...
asked 45 minutes ago -
A sledge loaded with bricks has a total mass of 18.9 kg and is
pulled at...
asked 44 minutes ago -
Suppose you have a set of coins of various denominations, with
values v1, v2, …, vn....
asked 44 minutes ago -
In the US, family structures can vary depending on
culture. For example, Hispanic-Americans and Asian-Americans are...
asked 1 hour ago