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Mekhanik [1.2K]
3 years ago
12

Describe the characteristics of the phospholipid bilayer that permit small hydrophobic lipid molecules to pass directly across t

he membrane.
Biology
1 answer:
Ipatiy [6.2K]3 years ago
6 0

Explanation:

The phospholipid bilayer forms the outermost layer of cells called the plasma membrane of the cell.

The phospholipids are arranged in the bilayer with the globular head composed of glycerol and the phosphate on the outer side (hydrophilic) and the hydrophobic carbon chain in the inner side.

The hydrophobic molecule present in the layer provides a characteristic feature to the membrane that is known as selective permeability. The selective permeability allows the non-polar or uncharged molecule to pass through the membrane and not the large polar molecules.

This is because the non-polar molecules can interact with the hydrophobic portion (tails) which could allow the molecules to pass through the membrane but the polar molecules are repelled by the hydrophobic protein so require special channels.

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Answer:

Carbon dioxide and oxygen are recycled through photosynthesis and cellular

respiration forever unless something interrupts.

Explanation:

Photosynthesis and cellular respiration are two distinct and opposite metabolical processes undergone by living cells. They are opposite processes because one utilizes the products of the other as reactants.

Photosynthesis is a unique process to autotrophic organisms like plants. It is the process whereby plants synthesize their food in form of organic molecules (glucose) by combining Carbondioxide (CO2) and water (H2O) in the presence of sunlight.

The overall equation of photosynthesis is as follows:

6CO2 + 6H2O ------> C6H12O6+ 6O2

On the other hand, cellular respiration is the process whereby living cells obtain energy (ATP) by breaking down food molecules (glucose) using oxygen to produce carbondioxide (CO2) and water as products. The overall equation is:

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Based on the lab experiments, it can be concluded that Carbon dioxide and oxygen are recycled through photosynthesis and cellular

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Option B is incorrect because light energy from the sun powers photosynthesis while option C is incorrect because photosynthesis transforms light energy to chemical energy while cellular respiration transforms chemical energy to thermal energy.

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