Unstinct

31.03.2020 • 

Biology

The phospholipids of plasma membranes are amphipathic: they have both hydrophilic and hydrophobic regions. The hydrophobic core
of the plasma membrane helps some materials move through the membrane, while it blocks the movement of others. How does the
structure of the cell membrane help to enable its function?

A)The double layer of phospholipids positions the hydrophilic lipid tails on
the inside, away from the external environment and the the watery
cytoplasm.
B)The double layer of phospholipids positions the hydrophilic lipid tails on
the outer edge towards the external environment and on the inner side
towards the watery cytoplasm.
C)The double layer of phospholipids positions the hydrophilic phosphate
heads on the outer edge towards the external environment and on the
inner side towards the watery cytoplasm.
D)The double layer of phospholipids positions the hydrophobic phosphate
heads on the outer edge towards the external environment and on the
inner side towards the watery cytoplasm.

Ответ:

king3620

26.05.2023

Biology

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Hope this helped u

Explanation:

Homogeneity : Salt water is homogeneous but chalk powder doesn't dissolve in water hence heterogeneous.

Filtration : We can separate chalk powder from water using filter paper and a funnel but whereas we can't separate salt from water using them we have to using crystallisation.

Stability : Salt is evenly spread through water we cannot see or feel it,hence it stable.Whereas chalk is not evenly spread and can be seen through naked eye,can be felt in hand and filters in a funnel and filter paper,therefore it is unstable.

Thank you soo much

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