Question

Describe the lac operon and how it controls the metabolism of lactose. support your answer with clear and well labelled diagrams

Answer 1

☆☆ AS-SALAMU-ALYKUM ☆☆

●●●●●●●●●●●●●●●●●●●●

IN BACTERIA GENES ARE CLUSTERED INTO OPERONS WHICH ARE GENE CLUSTERS THAT ENCODE THE PROTEINS NECESSARY TO PERFORM COORDINATION FUNCTION ,SUCH AS CATABOLISM OF A SUBSTRATE OBTAINED FROM OUTSIDE ( LAC OPERON ) OR BIOSYNTHESIS OF A GIVEN AMINO ACID (TRP OPERON ).

●●●●●●●●●●●●●●●●●●●●●

RNA THAT IS TRANSCRIBED FROM PROKARYOTES OPERONS IS POLYCISTRONIC ,A TERM IMPLYING THAT MULTIPLE PROTEINS ARE ENCODED IN A SINGLE TRANSCRIPT .

●●●●●●●●●●●●●●●●●●●●●

THE LAC OPERON CONSISTS OF ONE REGULATORY GENE ( THE GENE i AND THREE STRUCTURAL GENES ( x,y,a) . THE GENE CODES FOR THE REPRESSOR OF THE LAC OPERON .
THE z GENE CODES FOR BETA - GALACTOSIDASE , WHICH IS PRIMARILY RESPONSIBLE FOR THE HYDROLYSIS OF THE DISACCARIDE , LACTOSE INTO ITS MONOMERIC UNITS GALACTOSE AND GLUCOSE .

●●●●●●●●●●●●●●●●●●●●

THE y GENE CODES FOR PERMEASE, WHICH INCREASE PERMEABILITY OF THE CELL TO BETA - GALACTOSIDES . THE a GENE ENCODES A TRANSACETYLASE , AN ENZYME THAT TRANSFERS AN ACETYL GROUP FROM ACETYL Co A TO BETA GALACTOSIDES . ITS PRECISE FUNCTION AS PART OF THE LAC OPERON IS NOT UNDERSTPOD CURRENTLY

●●●●●●●●●●●●●●●●●●●●●●●●

♡♤♡ INSH ALLAH IT WILL HELP U ♡♤♡

♢♢ HAVE A NICE DAY☺☺ ♢♢

Answer 2

The lac operon is an operon, or group of genes with a single promoter transcribed as a single mRNA. The genes in the operon encode proteins that allow the bacteria to use lactose as an energy source. To use lactose, the bacteria must express the lac operon genes, which encode key enzymes for lactose uptake and metabolism. These proteins bind to the DNA of the lac operon and regulate its transcription based on lactose and glucose levels.