Answer:
The correct answer would be 0.85 liters.
It can be explained with the help of unit rate that is, when the rate is expressed as the quantity of 1 for example, 5 meter per second, 5 liters per day et cetera.
In this case, unit rate (liter per day) can be calculated by dividing the total amount of water used by total number of days.
Amount of water used in 28 days = 23.8 liters
The amount of water used in one day =
It comes out to be 0.85 liters per day or 850 milliliter per day.
<span>Discovery</span>
The operon model (Lac operon) of the regulation of gene expression in bacteria was proposed by Jacob and Monod and hey got noble prize in 1965 in Physiology and Medicine for this discovery.
Definition
<span> “</span><span>Operons are cluster of coregulated bacterial genes which regulate other genes responsible for protein synthesis” </span>
Explanation
<span>Operons were first studied in the bacterium E.coli, and they involve the enzyme of lactose metabolism and tryptophan biosynthesis. </span>
Structure of Operon
<span> </span>Operon is generally composed of three basic DNA components:
1. Promotor:
<span> It is a nucleotide sequence which is recognized by RNA polymerase and initiate transcription.</span>
2. Operator:
It is a segment of DNA that is present between the promotor and other genes to be transcribed. In presence of repressor, RNA polymerase is physically obstructed and cannot transcribe the genes. In the absence of repressor, operator is active and start transcription of other proteins.
3. Structural genes:
<span>These genes are responsible for synthesis of targeted proteins under the influence of operator<span>. </span></span>
Example of operon model:
<span> In bacteria two operon model have been extensively studied, these are:</span>
<span> a. Lac Operon, and</span>
<span> b. Tryptophan operon</span>
