58 669
Assignments Done
Successfully Done
In March 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Biochemistry Question for nida sadaqat

Question #15303
what is alternative forms of cholesterol formed in plants and bacteria ?
Expert's answer
Cholesterol in plants:

More than 250 steroids have been described in
plants. Of these, perhaps sitosterol, which differs from cholesterol by an ethyl
substituent at position 24, is the most common. But plants also contain
cholesterol both free and esterified. Cholesterol occurs as a component of plant
membranes and as part of the surface lipids of leaves where it is sometimes the
major sterol. The quantity of cholesterol is generally small when expressed as
percent of total lipid. While cholesterol averages perhaps 50 mg/kg total lipid
in plants, it can be as high as 5 g/kg (or more) in animals.

in bacteria:

The ability to synthesize sterols is rarely found in
prokaryotes. Consequently, when bacteria or blue-green algae are grown in
sterol-free media, sterols are not usually detected in their membranes. The lack
of cholesterol in microbial membranes is thus frequently cited as a feature
distinguishing them from eukaryotic cell membranes. The wall-less mycoplasmas
resemble other prokaryotes in their inability to synthesize sterols. Yet, unlike
the other prokaryotes, most of the mycoplasmas require exogenous cholesterol for
growth and incorporate large quantities of it into their cell membrane.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


No comments. Be first!

Leave a comment

Ask Your question