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lyudmila [28]
3 years ago
11

What purpose of transportation? Where does it happen the cell

Biology
2 answers:
blsea [12.9K]3 years ago
4 0

Answer:

Explanation: How do things move across a cell membrane?

Summary. Controlling the movement of things in and out of the cell is an important role of the plasma membrane. ... Osmosis is the diffusion of water molecules across a membrane. Water moves in or out of a cell by osmosis until its concentration is the same on both sides of the plasma membrane.

VladimirAG [237]3 years ago
4 0
Materials move within the cell's cytosol by diffusion, and certain materials move through the plasma membrane by diffusion (Figure 3). Diffusion expends no energy. On the contrary, concentration gradients are a form of potential energy, dissipated as the gradient is eliminated
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This very low concentration of the desired product would be unfavorable for glycolysis. In fact the reaction is coupled to ATP h
abruzzese [7]

Answer:

ΔG'° for the coupled reaction = -16.7 kJ/mol

<em>Note: The question is missing some parts. The complete question is as follows:</em>

<em>The first reaction in glycolysis is the phosphorylation of glucose: </em>

<em> Pi+glucose⟶glucose−6−phosphate+H2O </em>

<em>This is a thermodynamically unfavorable process, with ΔG∘′= +13.8kJ/mol. In a liver cell at 37 ∘C the concentrations of both phosphate and glucose are normally maintained at about 5 mM each.</em>

<em>This very low concentration of the desired product would be unfavorable for glycolysis. In fact the reaction is coupled to ATP hydrolysis to give the overall reaction: ATP + glucose → glucose-6-phosphate + ADP + H+</em>

<em>What is the ΔG'° for the coupled reaction?</em>

Explanation:

The coupling of ATP hydrolysis which is a thermodynamically favourable reaction to the phosphorylation of glucose makes it favourable. Since the two reactions constitute a sequential reaction, their standard free energy changes are additive.

For ATP hydrolysis: ATP + H₂O ---> ADP + Pi ; ΔG'°  = -30.5KJ/mol

For phosphorylation of glucose:  Pi + glucose⟶glucose−6−phosphate + H2O  ; ΔG'° = +13.8 kJ/Mol

For the overall reaction: ATP + glucose → glucose-6-phosphate + ADP + H⁺ ; ΔG'° = 13.8 + (-30.5) kJ/mol = -16.7 kJ/mol

Therefore, ΔG'° for the coupled reaction = -16.7 kJ/mol

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