When the protein spectrin (in human red blood cells) holds the erythrocyte membrane in place, by attaching it to cytoskeletal proteins, spectrin is exhibiting:  restricted movement in the membrane, based on tethering to extracellular molecules restricted movement in the membrane, based on confinement by diffusion barriers unrestricted movement in the membrane, similar to membrane lipids restricted movement in the membrane, based on attachment to other cells restricted movement in the membrane, based on anchoring to intracellular proteins

Q: What do diffusion and osmosis have in common? How are they different from active transport? In the…

A: Passive transport is the transport across the cell membrane in which there is no requirement of…

Q: In terms of their effect on the rate of diffusion, which of the following is the odd one out? a)…

A: The process by which molecules move from a region of higher concentration to a region of lower…

Q: Compare and contrast the following methods of a passing cell membrane in terms of movement with…

A: Plasma membrane is a selectively permeable structure which forms a barrier between cytoplasm and…

Q: In this cartoon, imagine that Romeo is a potassium ion (K+) and Juliet is a sodium ion (Na+).…

A: The plasma membrane of the cell regulates the entry and exit of different molecules according to…

Q: Which of the following statements is TRUE of diffusion?     Diffusion of particles along the…

A: The molecules are transported from one region to another by the process of transportation.

Q: Type of transport protein (channel or carrier/transporter?) K leak channel i glucose transporter…

A: Type Of  transport protein (channel or carrier/ transport)performs active or passive transport…

Q: Describe the difference between carrier proteins and channel proteins. What is required for the…

A: * The channel proteins are proteins that have ability to form hydrophilic pores in cell membranes…

Q: Describe the passive processes of membrane transport, including simple diffusion, facilitated…

A: The process of transport in a plant takes place at three levels. These are: The uptake and release…

Q: Some antibiotics act as carriers that bind an ion on one side of a membrane, diffuse through the…

A: The fluidity of lipid bilayer membranes increase with an increase in temperature. So, a decrease in…

Q: What would happen in each of the following cases where something related to intracellular transport…

A: Signal sequences are attached to a newly formed protein . It provides an address to transport them…

Q: Biological membranes are selectively permeable, allowing certain molecules to cross the membrane,…

A: The cells or the plasma membrane is the outermost layer enclosing the cell. It is responsible for…

Q: Types of substance transports through the membrane: secondary active transport (mechanism and…

A: Introduction :- Secondary active transport is a type of transport across biological membranes that…

Q: Being an integral membrane protein is critical to the function of which of the following protein…

A: Integral membrane proteins are membrane proteins that are permanently attached to the biological…

Q: Compare and contrast the following methods of a passing cell membrane in terms of movement with…

A: A process of the random movement of molecules toward a state of equilibrium is termed as diffusion.…

Q: Simple diffusion is defined as the movement of molecules from an area of higher concentration to…

A: Simple diffusion depends on the concentration gradient. The solutes moves along a concentration…

Q: List three types of movment displayed by molecules in the plasma membrane. Which type of molecule is…

A: Plasma membrane is a phospholipid bilayer. It acts as a barrier between the interior and the…

Q: Diatomic oxygen (O2) exhibits which of the following membrane transport movements?

A: Membrane Transport allows the transport of molecules across the lipid bilayer. The route through…

Q: Molecules transported in the fast phase of axoplasmic transport are:  Select all correct answers.…

A: Axoplasmic transport occurs in neurons. It is the transport by which proteins and other substances…

Q: An increase in which of the following would decrease rate of diffusion(flux)? (there can be multiple…

A: Diffusion:- is a movement of particles(could be atoms, ions, molecules, etc) from a higher…

Q: "Tight junctions perform two distinct functions: they seal the space between cells to restrict…

A: Two neighbouring cells that come together to form a barrier are said to have tight junctions.…

Q: Explain how the processes of diffusion, facilitated diffusion, and active transport occur and why…

A: Cells are the basic unit of life, and each cell is surrounded by the cell membrane. The cell…

Q: Other non-lipid-soluble molecules or ions, for which membranechannels are not present in the cell,…

A: The cell, which is the basic unit of all living organisms (both in terms of structure and function)…

Q: The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma…

A: Carbohydrates have an important part in cell-cell recognition. Carbohydrates provide specialised…

Q: Compare and contrast how an ion (e.g., Na+) is transported across the plasma membrane versus how a…

A: In the case of active transport, Na+ is transported via the sodium-potassium pump, which moves Na+…

Q: This cell is permeable to Urea, but not permeable to sucrose. Intracellular impermeant molecules…

A: Tonicity of a solution is the measure of the relative difference of the solute concentration or…

Q: In the plasma membrane, proteins carry out the following tasnks except ONE:

A: Plasma membrane  Plasma membrane of a cell is a boundary between the cell atmosphere to the outside…

Q: Which of the following is inversely related to the rate of diffusion for certain substance: a-…

A: Diffusion can be defined as a process in which there is movement of moleules takes place from the…

Q: Which of the following affects the permeability constant of a molecule in diffusion? the molecular…

A: The movement of different molecules like gasses, hormones and other molecules along there…

Q: Discuss carrier-mediated transport. How could you experimentally distinguish between the different…

A: Carrier mediated transport: It is an energy dependent pathway which is generally used by small…

Q: Which of the followings is not true about the function of the Tight Junctions? (LO- K8) They hold…

A: Tight Junctions are one of the types of cell junctions. It is also known as zonula occludens.…

Q: What would happen in each of the following cases where something related to intracellular transport…

A: Peptide has two ends: the end with a free amino group is called the N-terminal amino acid residue.…

Q: this part  provide an alternative disease that affects the organelle. What causes the disease? What…

A: 1. Alternative disease is congenital heart disease that affects heart  2. Certain environmental and…

Q: When the protein integrin (a transmembrane protein in human fibroblasts) is held in place, by…

A: Integrins are heterodimeric cell surface receptors that are potential therapeutic targets for a…

Q: Diffusion requires a membrane to occur. A True B False

A: The cell membranes are semi-permeable membranes that allow only some substances to pass through…

Q: Draw and label a cell lipid bilayer and diagram how the following transport processes take place:…

A: Plasma membrane is the outermost covering in all the cells that regulates the movement of molecules…

Q: Left Compartment                                        Right Compartment 7 grams of Z per liter…

A: Introduction In our cell plasma membrane acts as a barrier between inside and outside the cell.  The…

Q: _____transport (general term)uses the energy of Browain motion associated with gradients to move…

A: Brownian motion is the random movement of particles suspended in a fluid (medium).

Q: Describe ONE modification that could happen to the phospholipids in a membrane that would increase…

A: The membrane of cell organelles is composed of a phospholipid bilayer which contains two layers of…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.