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What is the semi-fluid internal medium of a cell that dissolves molecules between the nucleus and cell membrane?
Wiki User
∙ 12y ago
Wiki User
∙ 12y ago
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Give the 4 factors affecting substance transport?
-structure and composition of the membrane -sizes of molecules -movement of molecules -internal and external condition
What is the membrane that surrounds the cells?
this is the cell membrane made primarily of lipid molecules with proteins incorporated into it that aid in transport of molecules across the membrane
Where are chlorophyll molecules located within plant cells?
chlorophyll molecules are located in the thylakoid membrane
How easy or hard is it for polar molecules to pass through the cell membrane?
Polar molecules are effectively charged molecules. It's hard for them to cross the cell membrane because the membrane is comprised of an uncharged phospholipid bilayer. Charged molecules tend to have specific protein channels that allow them to cross the membrane.
Which structure regulates passage of molecules into and out of cells?
The cell membrane is a membrane separating the inside of the cell from the outside environment. This structure is also known as the plasma membrane or the cytoplasmic membrane.
What is the substance that fills the cell from the plasma membrane to the nuclear membrane?
The semifluid substance that fills a cell is cytoplasm.
What is the composition of a membrane?
A cellular membrane — including plasma membrane and internal membrane — is made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Creative Biogene
Give the 4 factors affecting substance transport?
-structure and composition of the membrane -sizes of molecules -movement of molecules -internal and external condition
What phase in the cell cycle dissolves the nuclear membrane?
The Nuclear membrane dissolves during prophase
What do the cytoplasm do in a plant cel?
The cytoplasm is the thick, jellylike material inside the cell membrane - not including the nucleus, in which the organelles are located. The cytoplasm helps to move materials around the cell. Cytoplasm provides support to the internal structures of the cell and helps it to maintain the shape and consistency of the cell. It also dissolves cellular waste and breaks down glucose molecules into pyruvate molecules, which are used by the mitochondria.
Hatching of honey bee eggs is unique for what reason?
Because the egg membrane dissolves. In other insects,they tear through the egg membrane upon hatching. In honey bees the egg membrane dissolves.
What different roles and functions do membrane proteins serve?
Membrane proteins relay signals between the cell's internal and external environments. They transport proteins and move molecules and ions across the membrane. They have many activities such as oxidoreductase, hydrolase or transferase.
Does the plasma membrane of a living cell form an impenetrable barrier between the internal millieu and the environment?
No, the plasma membrane is a selectively permeable barrier that regulates the flow of most molecules across the membrane. The plasma membrane allows waste products to exit the cell and nutrients to enter the cell.
What is the membrane that surrounds the cells?
this is the cell membrane made primarily of lipid molecules with proteins incorporated into it that aid in transport of molecules across the membrane
How do small molecules get through the cell membrane against a concentration?
How do small molecules get through a cell membrane
What is most likely to occur if the sugar molecules cross the membrane?
Sugar molecules move outside of the membrane.
What is the double layer of phospholipids?
The double layer of phospholipids is called the phospholipid bilayer. It forms the basis of every membrane, both the plasma membrane and all internal membranes.The idea that the bilayer has protein molecules embedded in it is the essence of the fluid mosaic model of the cell membrane.
