PLEASE HELP 100 POINTS URGENT

Biology

2 answers:

CaHeK987 [17]2 years ago

5 0

Answer:

Explanation:

Zolol [24]2 years ago

4 0

Option D is correct.
REASON/:
The fluidity of the cell membrane is due to unsaturated fatty acid. But longer the chain of fatty acid lower will be the fluidity it is because of the strong force of attraction arises due to long chain . So in order to retain the fluidity According to fluid mosaic model there is small amount of cholesterol which controls the fluidity of the cell membrane.
Therefore the option d is correct.

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The correct model is D.

Note: The first attachment below shows the different models. The second attachment shows the correct structural model of the water molecule.

Explanation:

A water molecule is composed of one atom of oxygen and two atoms of hydrogen.

A water molecule is polar, i.e. it contains positively and negatively opposite ends. The polar nature of the water molecule is due to strong electronegativity of oxygen which results in an uneven sharing of the bonding electrons between oxygen and hydrogen. The oxygen atom attracts the shared electrons more to itself, thereby, it acquires a partial negative charge, while the hydrogen atoms acquire a partial positive charge.

The bond angle between the oxygen and hydrogen atoms is approximately 105°. Therefore, from the first attachment below, the correct model for the water molecule is D.