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Harman [31]
3 years ago
5

What kinds of molecules pass using transport proteins

Biology
2 answers:
ella [17]3 years ago
4 0

A channel protein serves as a tunnel across the membrane into the cell. More specifically, channel proteins help molecules across the membrane via passive transport, a process called facilitated diffusion. These channel proteins are responsible for bringing in ions and other small molecules into the cell

VikaD [51]3 years ago
3 0
During this process, they serve as a tunnel for certain ions and smallmolecules. Examples of channelproteins include chloride, sodium, calcium, and potassium ion channels. Carrier proteins are used in both passive and active transport and change shape as they move their particular molecule across the membrane.
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The nucleus of "Lead-208", 208 82 Pb, has 82 protons within a sphere of radius 6.34×10-15 m. Each electric charge has a value of
jarptica [38.1K]

Answer:

2.94 × 10²⁰ N/C

Explanation:

Given that:  

The nucleus of "Lead-208 has 82 protons,

with a radius (r) 6.34×10-15 m, &

each electric charge has a value of 1.60218 × 10^-19 C

∴ The formula for calculating an electrical field at the surface of the nucleus is:

 E=\frac{k*q}{r^2}  

Substituting our values into the equation above, we have;

 E = \frac{8.98755*10^8*82(1.60218*10^{-19C)}}{(6.34*10^{-15}_m)^2}

E = 2.93870499×10²⁰ N/C

E ≅ 2.94 × 10²⁰ N/C

6 0
3 years ago
3. Consider the technology behind each type of
Degger [83]

Answer:

See the answer below

Explanation:

<em>The light microscope uses visible light to produce images of objects on its slide while the electron microscope uses beams of electrons to project the image of specimens.  Color is a property of photons of light, hence, the light microscope is able to produce images of specimens in their natural colors </em>

<em>The areas of the specimen on an electron microscope in which the beams of electron pass through usually appear white while other areas appear black. Hence, the electron microscopes can only produce grayscale images of specimens unless a false color is added to make the images visually appealing.</em>

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8 0
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Answer:

A. Evolution

Explanation:

Natural processes like speciation create variation in species, making them have biodiversity and a diverse gene pool.

Gradualism also allows for species to change gradually over time.

Both of these processes allow for evolution to occur, as speciation can create more favorable traits that will be passed down with the process of gradualism.

So, the correct answer is A, evolution.

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Explanation:

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Ray Of Light [21]

Answer:

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7 0
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