How many enzymes are typically produced from a single gene?

Answer 1

There is a hypothesis referred to as the one gene-one enzyme hypothesis proposed by Beadle and Tatum. It is generally true, with certain exceptions.

Answer 2

First I would like to tell you that all genes do not code for polypeptide sequence, and when there is no polypeptide there is no enzyme (if we leave ribozymes from the enzyme concept) that is some genes are only transcribed not translated hence no protein product, means no enzyme.

How?

some genes are transcribed into tRNAs, some into rRNAs, and some into mRNAs and it is only the mRNA that is translated to give rise polypeptide hence enzymes.

Now even those which code for mRNAs fall into different categories according to the no. of polypeptides they can code for. one group of mRNAs are those that undergo alternate splicing and the others fall in the group that undergo alternate splicing. now what is alternate splicing and what are its consequences? you may have heard of split genes concept. Split genes entails us the reason why length of the mRNA is shorter than that of the whole DNA sequence that codes for that gene. Genes in DNA are organised in the form of exons and introns. exons are the part which forms part of mRNA and leaves nucleus after splicing and introns are the part that is eliminated from mRNA at the time of splicing.

Now there are genes that undergo alternate splicing that is they can choose from the set of exons present in a gene squence,in one condition one set of exons and in the other condition some other set of exons in that case no of polypeptide sequence it can synthesize may be more than one. that is more than one enzyme if the function of the polypeptide happens to be enzyme.

hope this clarifies your question............

Answer 3

It's usually only one protein or enzyme per gene. There are a few exceptions.

Answer 4

well from one gene you can get many different products by cutting the sequence at different spots

by cutting it off at different spots, you get different sequences, and these sequences in turn have some parts common and some parts they are differentiated. even more by different ways of modification after the translation, this results in different amino acid sequences which means different proteins with some parts the same some parts different SO IN CONCLUSION DIFFERENT SEQUENCE MEANS DIFFERENT SHAPE WHÄ°CH MEANS DIFFERENT FUNCTION> DIFFERENT ENZYME ( and by proteins I mean enzymes to be specific)