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How do sugar glucose molecules able to pass through the cell membrane?
Wiki User
∙ 8y ago
facilitated diffusion - a solute binds to a specific transporter on one side of the membrane and is released on the other side after the transporter undergoes a conformational change. includes glucose,urea,fructose,galactose,and some vitamins.
Wiki User
∙ 13y ago
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Why do sugar molecules not diffuse through a plant cell membrane?
The membrane is semi-permeable. Sugar molecules are too large to diffuse through.
Must sugar dissolve in blood to enter cells?
yes, the molecules are too large to diffuse through the membrane
Why does your body need to break down starch into sugar?
To absorb something in the blood the molecule has to be small and dis solvable. Glucose is very small and can be easily absorbed in the blood but starch molecules are very big. Really many glucose molecules put together form a starch molecule. Be cause starch is so big the enzymes have to cut it down so that it can be digested into the body. This is why starch molecules have to be broken down into glucose for digestion in animals.
What process do sugar molecules enter or exit a cell?
1. Sugar (sucrose) cannot penetrate the cells and cannot be absorbed in blood because this disaccharide molecule is too big. 2. After the degradation of the disaccharide to monosaccharides (fructose, glucose, etc.) with the help of the enzyme sucrase these monosaccharides are easily absorbed in blood. 3. The monosaccharides molecules can penetrate by diffusion.
What particle can penetrate cell membrane easily?
particles that are small and hydrophobic and semipermeable. hydrophobic ions those that are soluble in lipids-- can easily pass through the membrane. In addition, small molecules like O2can sneak between the phospholipids of the membrane. On the other hand, hydrophilic molecules (like water and glucose) and ions (such as sodium ions and hydrogen ions) cannot pass directly through the phospholipids of the plasma membrane.
Why do sugar molecules not diffuse through a plant cell membrane?
The membrane is semi-permeable. Sugar molecules are too large to diffuse through.
Glucose and no other sugar is transported into cells by protein carrier molecules in the cell surface membrane. How do carrier molecules specifically recognize glucose?
the receptors on the protein carrier recognise glucose allowing it to enter the cell :)
Can glucose pass through a membrane?
Dialysis membranes are typically not permeable to sucrose. Removing sugar from the blood can be dangerous as it can lead to hypoglycemia. Sugar molecules are too large to pass through dialysis membranes.
What is the diffusion of water molecule through a selectively permeable membrane?
It's called osmosis. A selectively permeable membrane will only allow certain molecules to pass trough. To illustrate: If you have a high concentration of sugar molecules on one side of the membrane, no sugar on the other side, and the sugar molecules are too big to pass trough the membrane. If this is the case, then water molecules will diffuse over to the side of the membrane with a high sugar concentration. This happens because the molecules try to distribute themselves evenly in the solution. The water molecules move because the sugar molecules can't.
What is most likely to occur if the sugar molecules cross the membrane?
Sugar molecules move outside of the membrane.
What is the process by which molecules of sugar pass through an animal cell membrane to replenish the cell's lack of sugar is?
diffusion
What is mosly likely to occur if the sugar molecules can cross the membrane?
sugar molecules move outside of the membrane. novanet
Why did the number of the water molecules on each side of the membrane change where as the number of sugar molecules stayed the same?
The membrane is permeable to water but not to sugar.
If a membrane was not permeable to sugars why would it probably also not be permeable to starch molecules?
If a membrane is permeable to a substance, it means that there are gaps/holes/pores in the membrane large enough for that substance to pass through. Starch molecules are bigger that sugar molecules. So if the membrane is not permeable to sugars, the gaps/holes/pores will not be big enough for starch molecules to pass through either.
What are the special structures in the cell membrane that allow water and sugar pass through it made of?
These special structures are called protein gates or protein channels. Water is able to diffuse through the cell membrane since it is a small molecule. However, there are channels called aquaporins that allow water to enter the cell. A glucose molecule cannot just diffuse into a cell. There are glucose channels on the surface of the cell membrane that bind glucose molecules and allow them to enter the cell.
How would sugar entering a cell that already contains a high concentration of sugar get through a cell membrane and into the cell?
Glucose (sugar) enters the cell through facilitated diffusion, which is the movement of particles from an area of high concentration to an area with low concentration through a protein channel. This happens passively (on its own, with no extra energy required).It does not matter what other particles are in the cell--- the GLUCOSE will enter it so long as there is a higher concentration of GLUCOSE outside the cell than inside.The protein channel is needed because glucose molecules are too large to pass through the cell membrane by simple diffusion.
Why is it necessary that you digest hydrolyze starchy food?
Sugar molecules are more easily transported through the cell membrane than larger starch molecules.
