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-Dominant- [34]
3 years ago
13

The characteristics that best describe the tail of a phospholipid molecule are _____?

Chemistry
2 answers:
spayn [35]3 years ago
7 0

The answer is: a. neutral charge, nonpolar, and hydrophobic.

Phospholipids are lipids and major component of all cell membranes.

In phospholipid layer in cell membrane, there are hydrophilic heads (polar part of the layer) and hydrophobic tails (nonpolar part of the layer).

The structure of the phospholipid molecule is formed of two hydrophobic fatty acid tails and a hydrophilic head consisting of a phosphate group.

1) Small, non-polar molecules diffuse easily through this layer, no energy is required, this is passive transport.

2) Polar molecules cannot diffuse through phospholipid layer using passive transport, because hydrophobic tails does not allow that (polar molecules are reppeled), energy is required for that, this is active transport.

Furkat [3]3 years ago
3 0
<span>According to its definition, the answer is: The characteristics that best describe the tail of a phospholipid molecule are </span><span>a. neutral charge, nonpolar, and hydrophobic</span>
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The question is incomplete, complete question is :

The frequency factors for these two reactions are very close to each other in value. Assuming that they are the same, compute the ratio of the reaction rate constants for these two reactions at 25°C.

\frac{K_1}{K_2}=?

Activation energy of the reaction 1 ,Ea_1 = 14.0 kJ/mol

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The expression used with catalyst and without catalyst is,

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K_1 = rate constant reaction -2

Activation energy of the reaction 1 ,Ea_1 = 14.0 kJ/mol = 14,000 J

Activation energy of the reaction 2,Ea_1  = 11.9 kJ/mol = 11,900 J

R = gas constant = 8.314 J/ mol K

T = temperature = 25^oC=273+25=298 K

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