3 years ago

In what phase of mitosis do the chromosomes line up along the equator of the cell ?

Biology

1 answer:

kap26 [50]3 years ago

4 0

It occurs at the metaphase of the cell division cycle.

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Which of the folowing explain why sterols(or steriods) are considered to be lipids

taurus [48]

They are hydrophobic and insoluble in water

6 0

2 years ago

Fill in the blanks using the option below:

dezoksy [38]

Answer:

two, phospholipids, non polar, tails, polar, heads.

Explanation:

This is just basically illustrating one of the components of the lipid bilayer memebrane. The membrane is made up of two lipid layers with the polar head groups facing either the cytosol or the outer surroundings while the non polar tails facing each other. Such that this bilayer act as a barrier between the cytosol of the cell/organelle eg endoplasmic reticulum and the outer surroundings.

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3 years ago

our study partner has drawn four models of membrane-bound vesicles to try to show what a vesicle would look like with water both

Citrus2011 [14]

Answer:

The answer (Image 1) is attached. Since the options weren't provided, I've attached the image of the options, too.

Explanation:

The plasma membrane is composed of phospholipids, a special form of lipids with a hydrophilic head and hydrophobic tail. According to the fluid mosaic model, the hydrophilic heads are positioned towards the outside where they freely interact with the extracellular matrix and cytosol. Whereas, the hydrophobic tails are positioned towards the inside so they aren't exposed to water.

Liposomes are lipid bases particles used for drug and vector delivery. The picture shows a typical liposome.

In the current case, for water to move both outside and inside, hydrophilic heads should be present inside as well as outside the tails.