EVERYDAY SCIENCE

SCIENCE

VIRUS AND BACTERIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is an operon?
A
one gene that is expressed
B
a group of genes that are expressed together
C
a group of genes that do not express a protein
D
All of the Above
Explanation: 

Detailed explanation-1: -An operon is a cluster of genes that are transcribed together to give a single messenger RNA (mRNA) molecule, which therefore encodes multiple proteins (Fig. 16.11). Such polycistronic mRNA is typically found in prokaryotes.

Detailed explanation-2: -The operon: a group of genes with expression coordinated by an operator.

Detailed explanation-3: -Such a cluster of genes under control of a single promoter is known as an operon.

Detailed explanation-4: -An operon is the structure of a cluster of genes in the genome of an organism. The operons are comprised of many genes which encode for different proteins or products. The polycistronic mRNAis synthesized from which many polypeptides can be produced.

Detailed explanation-5: -Operon is a cluster of genes which have a common promoter, they are transcribed as a single mRNA. Examples of operon include lac operon and trp operon. lac operon: lac operon is an inducible operon present in Escherichia coli. ● It encodes the genes involved in the catabolism of lactose.

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