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Vlada [557]
3 years ago
6

Someone pls help me with this

Biology
1 answer:
Dima020 [189]3 years ago
6 0
A prong horn ( I’m sorry for the answer above but it’s funny)
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A "mystery molecule" was isolated in a laboratory and scientists found that the molecule readily crossed artificial membranes. W
Arlecino [84]

<u>Answer</u>:       D. calcium chloride

<em>Calcium chloride molecules can be ruled out as the mystery molecule</em>

<u>Explanation:</u>

<em>Artificial membranes are also called as the synthetic membranes.</em> It is created synthetically for the <em>special separation purpose in the laboratory. </em>

It is used to separate large molecules like <em>solid particles and big biological molecules like protein, DNA. </em>

They are produced from organic materials. <em>Calcium chloride contains the chloride ion and calcium ion,</em> as the chloride ion easily passes the artificial membrane so we can term <em>calcium chloride as the mystery membrane that passes the artificial membrane easily.</em>

5 0
3 years ago
If polar is positive and non-polar is negative then why can’t a polar molecule pass through the non-polar phospholipid membrane
Ierofanga [76]

Answer:

Because of the chemical and structural nature of the phospholipid lipid by layer the lipid soluble molecule can just pass the lipid membrane and some small molecules can also pass freely.

Explanation:

as we know that the homeostasis is an important process for a  living cell to maintain it self so for the the exchange of materials between the external and internal environment is must so for that it exchange material with the outside environment of the cell.as the cell membrane is semipermeable(mean allow some molecule to pass(lipid soluble) and not others(lipid non soluble) to pass through the membrane.the cell membrane is selectively permeable due to its nature and chemical composition the chemical composition is lipid and  phosphate and glycerol(head) with fatty acid that may b saturated or unsaturated(tail).so finally all those molecule which are polar can not pass through the membrane and  non polar can pass the membrane.The size of the molecule is also a factor on which the permeability depends.

3 0
3 years ago
Which of the following smaller reservoirs of freshwater are missing from the diagram?
vekshin1

Answer:

ice caps

Explanation:

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4 years ago
ASAP PLEASE HELPPP NEWTON’S THIRD LAW<br><br> THANKKK YOUU &lt;33333 (SCIENCE)
blagie [28]

Answer: His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.

Explanation:

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4 years ago
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4 billion

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