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Allushta [10]
3 years ago
13

why is it important that ions being transported across a cell membrane be shielded from the interior of the lipid bilayer

Biology
1 answer:
Degger [83]3 years ago
6 0

The answer is The ions are protected inside the lipid bilayer so that it is not pushed back to a more polar environment.

The lipid bilayer is mainly composed of lipids (phospholipids and cholesterol), and is also composed of proteins such as transporters.

The ions (which are polar) can not cross directly through the lipids because they will repel them due to their apolarity. On the other hand they can easily pass through protein channels that will protect them during their passage (the proteins are more polar than lipids).

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Producing and exporting organs in the plant (typically mature leaves) are known as sources, while non-photosynthetic organs (fruits, roots and tubers) and immature leaves are known as sinks.

Explanation:

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A human skin cell has 46 chromosomes. How many chromosomes will each daughter cell have at the end of mitosis?
konstantin123 [22]
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8 0
3 years ago
A pure-line green-seeded plant is crossed with a heterozygous plant. What do you expect in the progeny? Assume the givens of the
anzhelika [568]

Answer:

50% green-seed individuals vs. 50% yellow-seed individuals.

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Mendel is known as father of genetics. He explained the concept of dominance, the law of segregation and the law of independent assortment while working on pea plant.

Green seed color is recessive and yellow seed color is dominant. A pure green line seed plant (ss) is crossed with heterozygous plant (Ss). The cross is as follows:

Parents   ss (green seed)   ×     Ss (Yellow seed)

Gametes   s                                  S, s

progeny:  Ss, Ss, ss, ss.

Here, Ss is yellow seed and ss is green seed.

50% green-seed individuals vs. 50% yellow-seed individuals are formed after the cross.

Thus, the correct answer is option (a).

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