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The one gene-one polypeptide theory states that for every gene one protein is synthesized n a cell. This theory has lost favor with the discoveries of post-translational modification, protein splicing and epigenetics, all of which support the production of multiple protein products from a single gene.
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What does the one gene-one polypeptide state?
The one gene-one polypeptide hypothesis states that each gene is responsible for producing one specific polypeptide, which is a chain of amino acids that forms a protein. However, this hypothesis has been modified to the one gene-one protein hypothesis because some genes code for non-protein products like RNA molecules.
What is the one gene-one polypeptide hypothesis?
The one gene-one polypeptide hypothesis states that each gene in the DNA encodes for a single polypeptide (protein). This hypothesis has been updated to the one gene-one protein concept, as some genes can code for proteins that are composed of multiple polypeptide chains.
Why was the one gene one protein hypothesis altered to one gene one polypeptide hypothesis?
The one gene one protein hypothesis was altered to the one gene one polypeptide hypothesis because it was discovered that not all gene products are proteins. Some genes encode functional RNA molecules instead of proteins, and these RNA molecules have important biological roles. Therefore, the concept was expanded to include all gene products, whether they are proteins or functional RNA molecules.
Why has beadle and tatoms one gene - one enzyme hypothesis been midified since the presented it in 1940s?
Beadle and Tatum's "one gene-one enzyme" hypothesis has been modified since the 1940s because it was later found that not all proteins are enzymes, and that some genes can code for multiple proteins through alternative splicing and post-translational modifications. This led to the updated "one gene-one polypeptide" concept to account for the broader functions of genes in protein synthesis.
How did beadle and tatum's research result in the one gene-one polypeptide hypothesis?
The major breakthrough in demonstrating the relationship between genes and proteins came in the 1940s. American geneticists George Beadle and Edward Tatum worked with the orange bread mold Neurospora crassa. Beadle and Tatum studied mutant strains of the mold that were unable to grow on the usual nutrient medium. Each of these mutant strains turned out to lack a single enzyme needed to produce some molecule the mold needed, such as a vitamin or an amino acid. Beadle and Tatum also showed that each mutant was defective in a single gene. Their research led them to propose the "one gene-one enzyme" hypothesis. This hypothesis states that the function of an individual gene is to dictate the production of a specific enzyme.Since then, scientists have learned that some genes actually dictate the production of a single polypeptide, which may make up part of an enzyme or another kind of protein. Beadle and Tatum's hypothesis is now generally stated as one gene-one polypeptide.
What does the one gene-one polypeptide state?
The one gene-one polypeptide hypothesis states that each gene is responsible for producing one specific polypeptide, which is a chain of amino acids that forms a protein. However, this hypothesis has been modified to the one gene-one protein hypothesis because some genes code for non-protein products like RNA molecules.
Relationship between one gene and one polypeptide?
One gene codes for (or provides the recipe) for the creation of one polypeptide through transcription and translation.
What is the job of a gene?
A gene codes for one type of polypeptide (protein).
What is the one gene-one polypeptide hypothesis?
The one gene-one polypeptide hypothesis states that each gene in the DNA encodes for a single polypeptide (protein). This hypothesis has been updated to the one gene-one protein concept, as some genes can code for proteins that are composed of multiple polypeptide chains.
Why was the one gene one protein hypothesis altered to one gene one polypeptide hypothesis?
The one gene one protein hypothesis was altered to the one gene one polypeptide hypothesis because it was discovered that not all gene products are proteins. Some genes encode functional RNA molecules instead of proteins, and these RNA molecules have important biological roles. Therefore, the concept was expanded to include all gene products, whether they are proteins or functional RNA molecules.
Why has beadle and tatoms one gene - one enzyme hypothesis been midified since the presented it in 1940s?
Beadle and Tatum's "one gene-one enzyme" hypothesis has been modified since the 1940s because it was later found that not all proteins are enzymes, and that some genes can code for multiple proteins through alternative splicing and post-translational modifications. This led to the updated "one gene-one polypeptide" concept to account for the broader functions of genes in protein synthesis.
The one gene one polypeptide hypothesis is the currently accepted hypothesis explaining how genes help to determine the phenotype of an organism?
The one gene one polypeptide hypothesis posits that each gene in our DNA encodes for a specific polypeptide or protein. Each protein plays a role in determining the traits or characteristics of an organism. This hypothesis helps in understanding how genetic information is transferred from DNA to proteins, which are key players in determining an organism's phenotype.
What is the DNA segment that carries information for building one protein or polypeptide chain called?
mRNA ( it is like DNA only it is one sided and the t is replaced with a u)
How did beadle and tatum's research result in the one gene-one polypeptide hypothesis?
The major breakthrough in demonstrating the relationship between genes and proteins came in the 1940s. American geneticists George Beadle and Edward Tatum worked with the orange bread mold Neurospora crassa. Beadle and Tatum studied mutant strains of the mold that were unable to grow on the usual nutrient medium. Each of these mutant strains turned out to lack a single enzyme needed to produce some molecule the mold needed, such as a vitamin or an amino acid. Beadle and Tatum also showed that each mutant was defective in a single gene. Their research led them to propose the "one gene-one enzyme" hypothesis. This hypothesis states that the function of an individual gene is to dictate the production of a specific enzyme.Since then, scientists have learned that some genes actually dictate the production of a single polypeptide, which may make up part of an enzyme or another kind of protein. Beadle and Tatum's hypothesis is now generally stated as one gene-one polypeptide.
Which answer best explains why the discovery of alternative splicing forced biologists to change their definition of a gene?
It showed that a gene can direct the production of more than one polypeptide or RNA.
What do gene codes do?
Genes are the code for forming proteins. DNA is formed by nucleotides (adenine, thymine, guanine and cytosine). Every 3 of these bases (along the whole DNA strand), codify for a aminoacid, and several aminoacids form proteins. Several proteins determine a feature. In human genetics, everything except blood type (A, B, AB or 0) is determined by more than one gene.a gene codes for a polypeptide. however recent research shows that a gene doesn't always code for a protein and a gene can result in more than one polypeptide. but for the most part a gene codes for a polypeptide.
What is the theory the synthesis of each enzyme is catalyzed by one specific gene?
The theory you are referring to is the "one gene-one enzyme" hypothesis proposed by Beadle and Tatum in the 1940s. This theory suggested that each gene is responsible for encoding a specific enzyme, which catalyzes a specific biochemical reaction in an organism. Although it has been modified over time, the concept remains fundamental to our understanding of how genes encode proteins and their functions in cells.
