Respuesta :
Molecules called steroids, which include cholesterol, are membrane components that aid in membrane fluidity.
What is steroids?
A steroid is an organic molecule having four rings organized in a certain chemical configuration that is physiologically active. Steroids have two main biological purposes: they are signaling molecules and significant cell membrane constituents that affect membrane fluidity. Numerous steroid species can be found in fungi, animals, and plants. Lanosterol (opisthokonts) or cycloartenol are the two sterols used to make all steroid compounds in cells (plants). Squalene, a triterpene, is cyclized to produce lanosterol and cycloartenol.
Three six-member cyclohexane rings (rings A, B, and C in the first figure) and one five-member cyclopentane ring make up the majority of the seventeen carbon atoms that make up the steroid core structure (the D ring). The functional groups connected to this four-ring core and the degree of oxidation in steroids determine their differences.
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