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Nataly_w [17]
3 years ago
11

The transport of specific particles through a membrane by channel proteins is known as facilitated diffusion.

Biology
1 answer:
Anton [14]3 years ago
8 0

This is true.

Facilitated diffusion is a process by which molecules are transported across the plasma membrane with the help of membrane proteins.

It is a type of passive transport in which no energy from the cell is required for the process because a concentration gradient  exists that allows movement of particles without expending cellular energy. 

 Materials diffuse across the cell membrane with the help of membrane proteins some of which are known as carrier proteins.

Membrane proteins are proteins that are attached to, or associated with the membrane of a cell or an organelle.


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How does the plasma membrane of a cell compare with the membrane in the U-shaped tube?
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Answer:

La membrana plasmática, también llamada membrana celular, se encuentra en todas las células y separa el interior de la célula del ambiente exterior. En bacterias y en células de plantas, hay también una pared celular que se une a la membrana plasmática en la superficie exterior. La membrana plasmática se compone de una bicapa lipidia que es semipermeable. La membrana plasmática regula el transporte de materiales que entran y salen de la célula.

Explanation:

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3 years ago
Two solutions will be prepared with the mixture of distilled water and stock solution of KMnO4 (10 mM). Give the correct volumes
Yanka [14]

Answer:

See the answer below

Explanation:

<em>Recall that the law of dilution states that the number of moles before dilution must be equal to the number of moles after dilution.</em>

Mathematically,

     molarity x number of moles before dilution = molarity x number of moles after dilution.

For solution A: final molarity = 3 mM, final volume = 2mL, initial molarity of KMnO4 = 10 mM

Applying the equation:

    10 x initial volume = 3 x 2

        initial volume = 6/10 = 0.6

<u>Hence, Tube A should be made with 0.6 mL of 10 mM KMnO4 stock and  1.4 mL of distilled water to give a solution of 2 mL 3 mM KMnO4.</u>

For solution B:final molarity = 8 mM, final volume = 2 mL, initial molarity = 10 mM

    10 x initial volume = 8 x 2

       initial volume = 16/10 = 1.6

<u>Hence, Tube B should be made with 1.6 mL of 10 mM KMnO4 stock and 0.4 mL of distilled water to give a solution of 2 mL 8mM KMnO4. </u>

7 0
3 years ago
How do oceanic upwellings promote the growth of microscopic plankton?
MissTica

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They bring dissolved nutrients to the surface of the ocean. They decrease the levels of oxygen at the surface of the ocean. They decrease the amount of nutrients at the surface of the ocean.

Explanation:

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3 years ago
What is the term for the breakdown of glucose in the presence of oxygen?
Naily [24]

Answer:

Cellular respiration

Explanation:

Cellular respiration involves the breakdown of glucose using oxygen to produce energy, or ATP, that is used by the cell

8 0
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Compare the light and dark reactions that occur in plants.
sp2606 [1]

Answer:

The light reactions occur when light is absorbed by the chlorophyll in plants. ... Water splits, producing oxygen gas which is released through the stomata on plant leaves. The dark reactions occur in the stroma of the chloroplasts when carbon dioxide is converted to sugar using energy derived from ATP and NADPH.

Explanation:

6 0
3 years ago
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