While cells facilitate the transport of molecules via movement across the cell membrane, there many different mechanisms. These include passive diffusion, facilitated diffusion, and passive transport. However some very large molecules require specialized type of active transport, which requires energy in the form of ATP, in order to move substances across the membrane against their concentration gradient.

Active transport is a mediated process that requires an energy input and the use of specialized membrane proteins to move against the concentration gradient. These proteins require energy in the form of adenosine triphosphate or ATP in order to facilitate necessary conformational changes to the large protein molecules to alter the spatial location of the molecule. For instance, with Na+, K+ pumps in cell membranes.

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8 0

3 years ago

A student conducts an experiment where a thin piece of material is placed into a beaker to separate it into two halves. The stud

Phoenix [80]

Answer:

Explanation:

7 0

3 years ago

Which weathering process involves physical forces but not chemical

erica [24]

Answer:

<h3>Mechanical weathering, also called physical weathering, breaks rock into smaller pieces. These smaller pieces are just like the bigger rock, just smaller. That means the rock has changed physically without changing its composition.</h3>

Explanation:

<h2>GIVE BRAINLIST </h2>

7 0

2 years ago

What could you make or do to make sure your bean plants stay upright and don’t fall down?

nlexa [21]

Answer:

I got this off of g o o g l e

Explanation:

I put pairs of small fence posts (one on each side) down the row. I then tied twine to the fence post and ran it on either side of the plants. This keeps them from falling over to the side. If you plant thick enough they won't fall to the front or back.

7 0

3 years ago

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