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Elenna [48]
3 years ago
9

Which feature of a cell prevents water from entering the cell

Biology
2 answers:
Mrrafil [7]3 years ago
7 0

Answer:

The correct answer is hydrophobic tails of lipid bilayer forming cell membrane.

Explanation:

Plasma membrane is the specialized structure which forms the outer boundary of the cell and controls the entry and exit of substances into the cell thus, determining the nature of its contact with environment.

The cell membrane structure consists of amphipathic phospholipids with two components arranged in a manner:

1. Hydrophilic "head" region- made of phosphate molecule interacting with aqueous side or the intracellular (cytosolic) and extracellular faces

2. Hydrophobic "tail" regions- made of fatty acid chains away from the surrounding water.

This, results in the formation of lipid bilayer.

Thus, the hydrophobic tails of lipid bilayer prevents water from entering the cell.

DerKrebs [107]3 years ago
4 0

Answer: Nonpolar lipid layers

Explanation:

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Explanation:

En el síndrome de Down, se agrega un cromosoma adicional al complemento de cromosomas que un niño debe heredar de sus padres. Se supone que un niño tiene un complemento de 46 cromosomas (23 cada uno) de ambos padres. Una vez que hay un aumento en este número, se establece el síndrome de down. Es una condición cromosómica común. Puede manifestarse como una trisomía, causada por la no disyunción durante la división celular, lo que resulta en 3 copias del cromosoma 21 en lugar de 2 copias, mosaicismo, donde una mezcla de células se clasifican en 2 grupos que contienen un complemento completo de 46 cromosomas y el otro un el cromosoma adicional lo hace 47 y la translocación ocurre cuando un cromosoma 21 adicional o parte del 21 se une al cromosoma 14. Los niños generalmente tienen cabezas y orejas pequeñas, cuellos cortos, caras planas, etc.

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