Lipid bilayers are amphipathic. What does this mean?

Q: Cell membranes are composed of a lipid bilayer. How does the type of lipid bilayer affect its…

A: The cell membrane is composed of a phospholipid bilayer.

Q: In 2-3 sentences, summarize the spatial distribution of different types of structural lipids within…

A: Structure: A plasma membrane is a boundary that separates living cells from their non-living…

Q: Why are phospholipds arranged tail to tail instead of head to head on lipid bilayers.

A: Hydrophilic molecules dissolve in water because they contain charged groups. Hydrophobic molecules…

Q: 29. What distribution of amino acids would you expect to find in a protein embedded in a lipid…

A: The cell membrane is made up of a phospholipid bilayer in which the external phosphate heads on…

Q: Which of the following phospholipids islocalized to a greater extent in the outerleaflet of the…

A: (A) Choline phosphoglycerides are localized to a greater extent in the outer leaflet of the membrane…

Q: Sugars substitute water in many cells that may withstand extreme dehydration. These sugars interact…

A: It is given that sugars substitute water in many cells that may withstand extreme dehydration. These…

Q: What are lipid rafts? Describe the molecular components

A: As per the honor code, we only answer one question at a time. Therefore we are answering the first…

Q: Describe the macromolecular and biophysical characteristics of collagen in the extracellular matrix…

A: There are few points to know about collagen.  It is the major structural protein in the…

Q: Explain why the polypeptide chain of most transmembrane proteins crosses the lipid bilayer as an α…

A: Transmembrane proteins are proteins that are embedded in the membrane. They vary from the single…

Q: how does the protein porin cross the lipid bilayer in a cell membrane

A: The objective of this question is to understand the mechanism by which the protein porin crosses the…

Q: Peripheral membrane proteins are not amphipathic and do not associate with the nonpolar regions of…

A: Peripheral proteins are a set of biologically active molecules formed from amino acids.

Q: Lipid molecules can move easily across the plasma membrane because?

A: The cell membrane/plasma membrane is a biological membrane that causes protection of the cell from…

Q: why is unsaturated fatty acid used to maintain membrane fluidity and flexibility?

A: For cells to function properly, cell membrane integrity and functionality are essential. Maintaining…

Q: Why do they do not penetrate through the lipid bilayer?

A: The cell is the basic structural and functional unit of our body. It carries out many functions in…

Q: Describe Diffusion through the Lipid Bilayer?

A: Lipid bilayer refers to a biological membrane that contains two layers made of lipid molecules.…

Q: How is adipose tiisue matrix packed?

A: Adipose tissue is a form of loose connective tissue that is involved in the storage of fat.  Adipose…

Q: what is the Role of cholesterol in membrane fluidity?

A: Sanger and Nicholson, 1972 propounded the "fluid mosaic model" of biological membrane. According to…

Q: Explain how the amphipathic (containing both hydrophobic and hydrophilic sides) protein (shown;…

A: An amphipathic protein is one that has both hydrophobic (water-repelling) and hydrophilic…

Q: Part a) Would a single alpha helix be more stable in a aqueous solution or a membrane. Explain why.…

A: The secondary structure of proteins is referred to as the regular, recurring arrangements of…

Q: What differences would you expect in the structure of a membrane bound protein versus a cytosolic…

A: A protein molecule must fold into its appropriate three dimensional structure in order to become…

Q: What is the energetic driving force for the formation of phospholipid bilayers?

A: The phospholipid bilayer is a double membrane structure, which is present around to enclose the…

Q: Explain how membrane lipids self-assemble into bimolecular sheets.

A: The basic structure of the plasma membrane is the lipid bilayer. This bilayer is composed of two…

Q: What materials can easily diffuse through the lipid bilayer, and why? What is receptor-mediated…

A: The lipid bilayer is a semipermeable membrane that consists of a thin polar membrane made of two…

Q: Which property of phospholipids is responsible for the formation of phospholipid bilayers?

A: All cells are enclosed by a plasma membrane that forms a barrier between the cell and its…

Q: Most phospholipids are cylindrical, but some are closer to cone-shaped. If a cone- shaped lipid were…

A: Most biomolecules are not able to diffuse through the phospholipid bilayer in which, with the help…

Q: Lipid bilayers are said to behave like two-dimensional fluids. What does this mean?

A: The lipid bilayer (or phospholipid bilayer) is a thin polar membrane made of two layers of lipid…

Q: function of cholesterol in the lipid bilateral cell membrane

A: Cell membrane is the biological membrane that separates inside contents from outside environment.…

Q: Phospholipids (Which is charged, what is the functional significance? Are they preferentially…

A: Phospholipids are biomolecules that are composed of glycerol, phosphate group, and lipids/ fatty…

Q: If you place phospholipids in an oil-based solution, would they still self-assemble into a bilayer?…

A: All the cells have an outer layer that provides rigidity and protection. This layer is called plasma…

Nucleotides

It is an organic molecule made up of three basic components- a nitrogenous base, phosphate,and pentose sugar. The nucleotides are important for metabolic reactions andthe formation of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). 

Nucleic Acids

Nucleic acids are essential biomolecules present in prokaryotic and eukaryotic cells and viruses. They carry the genetic information for the synthesis of proteins and cellular replication. The nucleic acids are of two types: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The structure of all proteins and ultimately every biomolecule and cellular component is a product of information encoded in the sequence of nucleic acids. Parts of a DNA molecule containing the information needed to synthesize a protein or an RNA are genes. Nucleic acids can store and transmit genetic information from one generation to the next, fundamental to any life form.