Cell or Plasma Membranes

You would really have to stretch it to get a metaphore out of that comparision, but it could be compared to a school if you consider that mRNA for the DNA inside (a standin for information) the nucleus goes outside the membrane to translate what was in that DNA into proteins and enzymes, stuctures which have certain "jobs" to perform in cellular metabolism.

Kids learn information inside a school, then graduate, go outside and perform jobs.

Cell membranes are present in both plant and animal cells. They serve as a protective barrier that controls the movement of substances in and out of the cell, helping to maintain the cell's internal environment and regulate its functions.

Yes, the plasma membrane helps maintain cell shape by providing structural support and defining the boundaries of the cell. It also regulates the movement of substances in and out of the cell, which helps maintain the cell's internal environment and overall shape.

Yes, glycolipids are a type of lipid that contain a carbohydrate chain attached to a lipid molecule. They are one of the major components of the plasma membrane, where they play roles in cell-cell recognition, signaling, and maintaining membrane structure.

It's impossible.

Fats can cross the cell membrane through passive diffusion, facilitated diffusion, or by being transported with the help of carrier proteins. These methods allow fats to move across the lipid bilayer and enter the cell for various cellular processes.

If the cell membrane were completely made of polar substances, it would be impermeable to non-polar molecules like oxygen and carbon dioxide, affecting the cell's ability to exchange gases with its environment. This could disrupt important cellular processes like respiration, leading to energy depletion and potential cell death.

Glucose molecules are transported across the cell membranes of the intestine through facilitated diffusion using glucose transporters (GLUT proteins), particularly GLUT2 and GLUT5. These transporters help facilitate the movement of glucose into intestinal cells for absorption into the bloodstream.

Large polar molecules and ions generally cross lipid bilayers the slowest due to their size and charge, which hinders their ability to move through the hydrophobic interior of the membrane. Additionally, molecules that are not lipid soluble or do not have specific transporters in the membrane will also have difficulty crossing the lipid bilayer.

Yes, eukaryotes in animal cells have cell membranes. The cell membrane is a semi-permeable barrier that surrounds the cell, regulating the passage of substances in and out of the cell. It plays a crucial role in maintaining the cell's internal environment and protecting the cell from its surroundings.

The phospholipid bilayer of the plasma membrane, specifically the integral membrane proteins like transport proteins and ion channels, regulate what enters and leaves the cell by controlling the movement of molecules across the membrane.

Neurons have greatly increased surface area due to their dendrites and axons. Intestinal cells have greatly increased surface area due to microvilli on the surface of the cells that help in absorption of nutrients.

Cell membrane is also known as plasma membrane. Controls exchange of materials such as nutrients and waste between cells and their environment. Has other important functions for example to enable cells to receive hormones.

Detergents disrupt the hydrophobic interactions between an integral membrane protein and the fatty acid tails of the lipid bilayer. This removes the integral proteins from the bilayer, and since the lipid bilayer is 50% protein, this breaks it down a lot.

Yes, a human cell has a plasma membrane. The plasma membrane surrounds the cell and acts as a barrier that controls the movement of substances in and out of the cell. It is essential for maintaining the cell's internal environment and protecting its contents.

Yes, algae have plasma membranes. The plasma membrane is a key feature of all living cells, including algae, as it acts as a protective barrier, regulates the movement of molecules in and out of the cell, and helps maintain cellular integrity.

There are three main types of cell extensions in biology: cilia, flagella, and microvilli. Cilia are short, numerous hair-like projections that help with movement and sensing. Flagella are long, whip-like extensions that aid in cell movement. Microvilli are small, finger-like projections that increase the surface area of cells for absorption and secretion.

Yes, glycolipids are a type of lipid that contains a carbohydrate molecule attached to the lipid portion. They are indeed a constituent of the plasma membrane, where they play roles in cell recognition, signaling, and cell-cell interactions.

No, messenger RNA (mRNA) is not a constituent of the plasma membrane. mRNA is a type of RNA molecule that carries genetic information from the DNA in the cell nucleus to the ribosomes in the cytoplasm where protein synthesis occurs. The plasma membrane is primarily composed of lipids and proteins that help regulate the passage of molecules into and out of the cell.

Pores in the cell membrane can be formed by protein complexes called ion channels or porins. Ion channels allow specific ions to pass through the membrane, while porins allow the passage of larger molecules or solutes. These pores play crucial roles in regulating the movement of substances in and out of the cell.

Major histocompatibility complex (MHC) proteins, also known as human leukocyte antigens (HLAs), are self antigens found on cell membranes. These proteins play a key role in presenting foreign antigens to the immune system for recognition.

Cholesterol is a steroid that helps stabilize the lipids of a plasma membrane by regulating membrane fluidity and permeability. It helps prevent the fatty acid chains of phospholipids from packing too closely together, maintaining the integrity and flexibility of the membrane.

Yes, the plasma membrane is composed of a phospholipid bilayer with proteins embedded in it. Cholesterol molecules are also present in the plasma membrane, helping to regulate its fluidity and stability.

No, the plasma membrane does not produce proteins. Proteins are synthesized by ribosomes in the cytoplasm and then transported to the plasma membrane to carry out various functions such as transport, signaling, and cell adhesion.

The plasma membrane of a cell acts as a barrier, regulating the passage of substances in and out of the cell. It also helps maintain the cell's internal environment and communicates with other cells. Additionally, the plasma membrane contains receptors that allow the cell to respond to signals from its environment.