Answer:
the main body system is circulatory system?
Answer:
A) Fatty acids
Explanation:
Sterols are the organic compounds composed of the four rings fused together, an attached hydrocarbon chain and the characteristic functional group called -OH group attached to the ring.
The steroids are the compounds which contain the fused rings (a feature of sterol) and the attached -OH group. The presence of the hydrophobic chain provide makes them insoluble in water which is considered a characteristic feature of the lipids. Therefore the steroids are considered the lipid molecule or fatty acid-containing molecules.
The cholesterol is the most common type of sterol present in the organism, especially in the animal and plants.
Thus, Option-A is the correct answer.
Answer:
microRNAs
Explanation:
Within the cell, there are different types of regulatory non-coding RNAs (ncRNAs) such as microRNAs (miRNAs), small-interfering RNAs (siRNAs), piwi-interacting RNAs (piRNAs), long ncRNAs, etc., which are able to regulate gene expression. miRNAs are evolutionary conserved small ncRNAs (typically 18-23 nucleotides in length) known to inhibit gene expression by base-pairing with complementary target mRNAs, and thus trigger RNA interference (RNAi) pathways (e.g., mRNA degradation, inhibition of translation, etc). These miRNAs form part of a ribonucleoprotein complex named RNA-induced silencing complex (RISC) that acts to trigger RNAi mechanisms.
Multicellular Organisms. Hope this helps!
<span>The correct answer is cGMP.</span>
<span>cGMP, during the dark (when there are no stimulations of photoreceptor cells), reaches high intracellular levels. When the light stimulation occurs cGMP levels decrease because it is converted to GMP by phosphodiesterase. Phosphodiesterase is activated by transducin which is activated by excited rhodopsin (contains photopigment).</span>
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Low levels of cGMP block the cGMP gated ion channels and that prevents the entry of Na and Ca. Because of that membranes becomes more negative, hyperpolarization occurs and this creates a signal for the next cell.</span>
