Most cytoplasmic proteins lack disulfide bonds, whereas extracellular proteins usually contain them. Why?

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: How are the Casparian strip and tight junctions similar?

A: The Casparian strip is a band of cell divider material kept in the extended (radial) and get-over…

Q: What substance would you most expect to easily pass through a cell membrane (phospholipid layer)…

A: Cell membrane forms boundary of cell. It separates outside environment from inside environment.…

Q: Which of the following schematics of cell membranes (i-iv) show the correct orientation of…

A: The cell membrane, also known as the plasma membrane, is found in all cells and serves to separate…

Q: The membrane phospholipids phosphatidyl serine and phosphatidyl choline are named based on ...

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Define lipid bilayer

A: Lipids are the major constituent of the plasma membrane. These are composed of fatty acids and…

Q: What's Is the chemical composition of the lipid part of the Cell membrane? What is the most common…

A: Lipids are made of the elements Carbon, Hydrogen, and Oxygen, but have a much lower proportion of…

Q: How would a cell membrane having phospholipids that contain a high percentage of oleic acid differ…

A: Cell is the smallest structural and, functional unit of life. It is simple machinery that houses all…

Q: Lipid bilayers are amphipathic. What does this mean?

A: Hydrophilicity is the character of the molecules in which molecules love water that is they dissolve…

Q: In the membrane of a human red blood cell, the ratio of the mass of protein (average molecular…

A: Introduction: Introduction: Proteins are the most plentiful natural molecule of the living…

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: Why don’t proteins turn around in biological membraneslike revolving doors?

A: Membranes : It is the thin layer that forms the outer boundary of a living cell or of an internal…

Q: The fatty acid tails in the plasma membrane are ______________ which means they are _______________.

A: Phospholipids are main components of the plasma membrane which is the outermost layer of animal…

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: Identify the three different types of membrane proteins.

A: The primary unit of life is the cell. Based on the number of cells an organism may be unicellular or…

Q: Explain why the structure of phospholipids enables them to form lipid bilayers in aqueous…

A: Lipid bilayer-  It has two layer of lipid molecule. Each lipid molecule has has a hydrophobic…

Q: Although proteins rarely if ever flip-flop across a membrane, the distribution of membrane lipids…

A: The phospholipids and many other proteins freely move along the horizontal direction of the cell…

Q: What are the forces that maintain structural integrity of biological membranes and Explain how each…

A: Cell membranes or biomembranes are quasi-fluid, elastic, pliable, and film-like thin partition over…

Q: Given that phospholipid synthesis occurs only on ONE side of the bilayer, how does a cell end up…

A: The eukaryotic cells contains phospholipids as the major components of the plasma membrane composed…

Q: Define The domain structure of cytoplasmic dynein.

A: Dynein is a motor protein that requires ATP as a source of energy to mediate intracellular…

Q: Membrane proteins move laterally in a phospholipid bilayer but generally not up and down. Why would…

A: Membranes structure in eukaryotes is mostly consistent across cells and different organelles. It is…

Q: What is the structure of a phospholipid present in the phospholipid bilayer?

A: A bilayer of phospholipids forms the cell membrane, which consists of two adjacent layers. The…

Q: What intermolecular forces stabilize a lipid bilayer?

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

Q: Would substances be able to pass through the plasma membrane if the phospholipid tails of the plasma…

A: Transport of molecules become difficult across plasma membrane if the phospholipid tails of plasma…

Q: Drag and Drop 1Cholesterol 2 Phospholipid 3 Carbohydrate chains 4 Peripheral globular protein 5…

A: Introduction  Cell Membrane : Cell Membrane Is Made Up Of A Phospholipid Bilayer With Proteins…

Q: Polypeptides which are normally synthesized in the endoplasmic reticulum are about 20 amino acids…

A: Proteins are synthesized by the ribosomes present on the endoplasmic reticulum, thus they are known…

Q: In lipid bilayers, there is an order– disorder transition similar to the melting of a crystal. In a…

A: Introduction: The biomolecule which is insoluble in water and not a polymer like other biomolecules…

Q: Why should triacylglycerol be insignificant component of plasma membrane ?

A: Answer: Introduction: Plasma membrane are selectively permeable in nature and important cell…

Q: Why phosphoglycerides can be found in the cell membrane?

A: A cell membrane surrounds all live cells. Plant and animal cells both have a cell nucleus, which is…

Q: Given that the structure of only a tinyfraction of all membrane proteins hasbeen determined, what…

A: Membrane proteins are found to be a permanent part of the cell membrane. These proteins have a…

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: List Six major functions of Membrane Proteins.

A: Membrane proteins are present on the surface of the plasma membrane of the cell. These proteins are…

Q: Why must cholesterol, although lipid-soluble, cross most membranes by means of receptor-mediated…

A: The dietary cholesterol is up taken by the cells in form of lipoproteins. The enterocytes present in…

Q: Which of the following components are embedded across the phospholipid bilayer? Group of answer…

A: Phospholipids are present abundantly in the membranes. Apart from the phospholipids, the…

Q: Why are glycerophospholipids, rather than triacylglycerols, found in cell membranes?

A: Cell membranes is the outer protective layer of the cell which is made up of lipid bilayer. This…

Q: Which of the following protein structures most likely represents a transmembrane protein? A C D

A: As not every molecule is able to pass through cell membranes. To cross the membrane, the molecules…

Q: In many cells that can survive severe dehydration, certain sugars replace water. These sugars…

A: In the cells during the severe dehydration, sugars that take the role of water are known as…

Q: Glycophorin, a protein in the plasma membraneof the red blood cell, normally exists as a homodimer…

A: Hydrophobic means water repelling. There are certain amino acids in a protein which poses…

Q: Proteins, like lipids, are free to move in the membrane. How do we know this?

A: Membranes are composed of lipid bilayers.

Q: What is an example of a phospholipid bilayer?

A: a phospholipid bilayer is a unit membrane made of 2 layers of phospholipids in such a way that the…

Q: What features in the chemical composition of phospholipids make them ideal components of the…

A: Phospholipids are a class of lipids whose molecule has a hydrophilic "head" containing a phosphate…

Q: How commonly do specific lipidmolecules associate with membraneproteins to regulate their function?

A: Lipids have a tendency to form the bilayer that helps in the passage of water-soluble materials…

Q: What would happen if the cell membrane was covalentlylinked rather than held together by relatively…

A: Introduction: The cell membrane is made of lipid molecules arranged in a bilayer with their…

Q: What is the structure of lipid bilayers?

A: The cell membrane is a covering around the cell which guards the entire cell against any kind of…

Q: The intermolecular force that is most important in keeping the two layers of a lipid bilayer…

A: The lipid bilayer is a biological membrane consisting of two layers of lipid molecules. Each lipid…

Q: What properties define the phospholipids that make up the lipid bilayer?

A: A cell is a structural and functional unit of life. The structure and function of a cell have been…

Q: Here is a portion of a cell membrane.       By percent weight it is composed of      Approximately…

A: The cell membrane contains different macromolecules arranged with each other in orderly manner. The…

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.