Biology : asked on abrito1559
 08.02.2020

Will the polar portion of the phospholipid mix well with water ?

. 4

Faq

Advanced Placement (AP)
Step-by-step answer
P Answered by PhD

B• The hydrophilic phosphate groups of the phospholipid molecules are attracted to the aqueous internal and external environments.

Explanation:

Hello, you did not put the model to which this question refers, but I can say that the letter B is the correct answer, due to the composition that the phospholipids present.

Phospholipids are a molecule formed by two tails of hydrophobic fatty acids, that is, they do not come into contact with water, and a type of "head" that is a hydrophilic phosphate group, that is, it allows contact with water.

When a molecule formed by phosphate groups is found in an aqueous medium, it is common for the hydrophobic tail to be attracted to the inner corner of the molecule, preventing contact with water, while the hydrophilic part faces the outer side of the molecule.

Advanced Placement (AP)
Step-by-step answer
P Answered by PhD

B• The hydrophilic phosphate groups of the phospholipid molecules are attracted to the aqueous internal and external environments.

Explanation:

Hello, you did not put the model to which this question refers, but I can say that the letter B is the correct answer, due to the composition that the phospholipids present.

Phospholipids are a molecule formed by two tails of hydrophobic fatty acids, that is, they do not come into contact with water, and a type of "head" that is a hydrophilic phosphate group, that is, it allows contact with water.

When a molecule formed by phosphate groups is found in an aqueous medium, it is common for the hydrophobic tail to be attracted to the inner corner of the molecule, preventing contact with water, while the hydrophilic part faces the outer side of the molecule.

Biology
Step-by-step answer
P Answered by PhD
Attached is Model 1. I found the exercise on the internet.

A. The portion of the molecule that's polar is the head of the molecule - phosphorus containing group plus the glycerol backbone.
The other part of the molecule has two fatty acid chains which are hydrophobic meaning that they are nonpolar.

B. Yes, it would mix well with water because polar molecules are dissolved in water perfectly. Their partly positive portion and their negative polar connect to the positive charge of the H atoms and negative charge of the O atom of the water molecules.
A. circle the portion of the molecule in model 1 that is polar. b. would this portion of the phospho
Biology
Step-by-step answer
P Answered by PhD
Attached is Model 1. I found the exercise on the internet.

A. The portion of the molecule that's polar is the head of the molecule - phosphorus containing group plus the glycerol backbone.
The other part of the molecule has two fatty acid chains which are hydrophobic meaning that they are nonpolar.

B. Yes, it would mix well with water because polar molecules are dissolved in water perfectly. Their partly positive portion and their negative polar connect to the positive charge of the H atoms and negative charge of the O atom of the water molecules.
A. circle the portion of the molecule in model 1 that is polar. b. would this portion of the phospho
Biology
Step-by-step answer
P Answered by PhD

The correct answer is - hydrophobic and nonpolar.

Explanation:

Phospholipids are amphipathic molecules which means they show the both hydrophobic and hydrophilic properties. This property is due to the fact that they have a phosphate head that is hydrophilic, and polar while there are also two hydrophobic nonpolar fatty acid tails.

The fatty acid chains have a cis double bond and are the uncharged, nonpolar tails, which are hydrophobic.

Thus, the correct answer is - hydrophobic and nonpolar.

Biology
Step-by-step answer
P Answered by PhD

The correct answer is - hydrophobic and nonpolar.

Explanation:

Phospholipids are amphipathic molecules which means they show the both hydrophobic and hydrophilic properties. This property is due to the fact that they have a phosphate head that is hydrophilic, and polar while there are also two hydrophobic nonpolar fatty acid tails.

The fatty acid chains have a cis double bond and are the uncharged, nonpolar tails, which are hydrophobic.

Thus, the correct answer is - hydrophobic and nonpolar.

Biology
Step-by-step answer
P Answered by Specialist

(a) Intracellular organelles that are engaged in degradative chemical reactions are limited by membranes.-Localization of function.

(b) On their outer surface, cells of multicellular organisms carry specific glycoproteins that are responsible for cell-cell adhesion- intercellular communication.

(c) The interior of a membrane consists primarily of the hydrophobic portions of phospholipids and amphipathic proteins. -regulation of transport.

(d) Cellular membranes have a two-layered structure with hydrophobic tails facing each other.-permeability barrier

(e) All of the acid phosphatase in a mammalian cell is found within the lysosomes. -localization of function.

(f) The membrane of a plant root cell has an ion pump that exchanges phosphate inward for bicarbonate outward.-regulation of transport.

(g) Ions and large polar molecules cannot cross the membrane without the aid of a transport protein. -permeability barrier.

(h) Insulin does not enter a target cell but instead binds to a specific membrane receptor on the external surface of the membrane, thereby activating the enzyme adenyl cyclase on the inner membrane surface.-Detection of signal.

Explanation:

Biological membranes are dynamic, fluid structure that form a boundary around cell organelles and cell.They are made up of lipids and proteins. They have several functions such as restricting function, localization, communication etc,

Biology
Step-by-step answer
P Answered by Specialist

(a) Intracellular organelles that are engaged in degradative chemical reactions are limited by membranes.-Localization of function.

(b) On their outer surface, cells of multicellular organisms carry specific glycoproteins that are responsible for cell-cell adhesion- intercellular communication.

(c) The interior of a membrane consists primarily of the hydrophobic portions of phospholipids and amphipathic proteins. -regulation of transport.

(d) Cellular membranes have a two-layered structure with hydrophobic tails facing each other.-permeability barrier

(e) All of the acid phosphatase in a mammalian cell is found within the lysosomes. -localization of function.

(f) The membrane of a plant root cell has an ion pump that exchanges phosphate inward for bicarbonate outward.-regulation of transport.

(g) Ions and large polar molecules cannot cross the membrane without the aid of a transport protein. -permeability barrier.

(h) Insulin does not enter a target cell but instead binds to a specific membrane receptor on the external surface of the membrane, thereby activating the enzyme adenyl cyclase on the inner membrane surface.-Detection of signal.

Explanation:

Biological membranes are dynamic, fluid structure that form a boundary around cell organelles and cell.They are made up of lipids and proteins. They have several functions such as restricting function, localization, communication etc,

Biology
Step-by-step answer
P Answered by PhD

The correct answer is C the polar head groups of phospholipid,glycolipid and cholesterol face towards the interior of the bilayer.

Explanation:

Plasma membrane contains various lipid molecules such as phospholipid,glycolipid,sphingolipid and cholesterol.The polar head groups of the phospholipid,glycolipid and cholesterol faces the hydrophilic region which is present outside the lipid bilayer and the nonpolar groups faces the  hydrophobic region that is present interior of lipid bilayer.

Biology
Step-by-step answer
P Answered by PhD

The correct answer is C the polar head groups of phospholipid,glycolipid and cholesterol face towards the interior of the bilayer.

Explanation:

Plasma membrane contains various lipid molecules such as phospholipid,glycolipid,sphingolipid and cholesterol.The polar head groups of the phospholipid,glycolipid and cholesterol faces the hydrophilic region which is present outside the lipid bilayer and the nonpolar groups faces the  hydrophobic region that is present interior of lipid bilayer.

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