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3 years ago

Membrane phospholipids have hydrophobic heads that face the center of the membrane and

Biology

1 answer:

zysi [14]3 years ago

3 0

Answer: Option B. are able to drift about in the plasma membrane.

Explanation:

Membrane phospholipid are having a amphiphilic structure which contains a hydrophilic "head" consisting of a phosphate group and two hydrophobic fatty acid "tails" that are connected to a glycerol molecule.

In contact with water, membrane phospholipid hydrophobic tail avoid interaction with water molecules and allow to drift about in the plasma membrane. the hydrophilic heads line up against each other and forms lipid bi-layer that faces towards water.

The movement of membrane phospholipid forms the fluid mosaic model,in which lipid molecules act as solvent and proteins embedded in it. This allows the proteins and lipid to move across plasma membrane.

Hence, The structural property of membrane phospholipid makes them able to drift about in the plasma membrane

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A -cell can present an anitgen to -cell

enot [183]

Explanation:

under what circumstance does a negative cell presents An antigen to another negative cell

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3 years ago

What words can you think of that have therm- as a prefix? From these words, what do

nlexa [21]

Words thermal, thermocouple, thermos, thermel. Therm is all about heat, it’s a unit of heat. Therm is a Greek word meaning heat such as thermometer hypothermia and many more

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2 years ago

Hasan is a three-year-old boy who lives in dhaka, bangladesh. He is small for his age, has bowed legs, exhibits muscle weakness,

marysya [2.9K]

Hasan most likely has rickets

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3 years ago

In Drosophila, straight wings are dominant to curved wings (c), smooth eyes are dominant to sparkling eyes (spa), and tan body i

77julia77 [94]

Answer:

$\frac{1}{8}$

Explanation:

Straight wings are dominant over curved wings

Let Straight wings : H

curved wings : t

smooth eyes are dominant to sparkling eyes

let smooth eyes = H

spark ling eyes = t

tan body is dominant to ebony body color.

Again; Let tan body color be H

Let ebony color be t

If flies that are heterozygous for all three traits are crossed;

we have HtHtHt × HtHtHt

Then the selected trihybrid traits for the cross will be (HHH,HHt, HtH, Htt, tHH, tHt, ttH, ttt)

We will realize that from the punnet square in the diagram below, the proportion of the offspring would you expect to be heterozygous for all three traits (i.e HtHtHt) is asterisk in the punnet square and will be $\frac{8}{64}$

= $\frac{1}{8}$

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3 years ago

in animal muscular movement is caused due to change in position of proteins how do you think movement will be brought about in t

Colt1911 [192]

Answer:

Movement will be brought about in touch me not plants by the action of various chemicals present at the base of the leaf stalk. 

Explanation:

The leaves of touch me not plant stay upright due to turgor pressure. It is exerted by the water present within its cells. This pressure applies force against the cell wall enabling the plant to remain stiff.

When there is an external disturbance , parts of the plant releases certain chemicals including potassium ions that causes water to diffuse out of cells. This releases the turgor pressure and causes the leaves to shrink. 

7 0

3 years ago