What is the difference between one-gene/one-protein hypothesis and one-gene/one-polypeptide hypothesis?
One gene-one Protein hypothesis was first given by Archibald Garrod in 1909. It said that each gene codes a single, specific enzyme. Thus under this hypothesis, each gene is responsible for the enzyme initiating a single step in a metabolic process.
One gene-one Polypeptide hypothesis was first given by George Beadle in 1945. It said that each gene is responsible for the synthesis of a single polypeptide. This theory was modified because it was realized that genes also encoded nonenzyme proteins and individual polypeptide chains.
What is the difference between one-gene/one-protein hypothesis and one-gene/one-polypeptide hypothesis?
What is the difference between a polypeptide and a protein? I'm not understanding this sentence in my textbook: "While the terms polypeptide and protein are sometimes used interchangeably, a polypeptide is technically a polymer of amino acids, whereas the term protein is used for a polypeptide or polypeptides that have combined together, often have bound non-peptide prosthetic groups, have a distinct shape, and have a unique function."
1. Explain the difference between activation of g-protein coupled recepetor activation and direct gene activation. A. Which one happens faster? B. Which one lasts longer?
7. Explain the difference between gene duplication and divergence, and the role of each. Give one example of a protein that demonstrates this process.
Which of the following is a difference between the use of a reporter gene to study gene regulation (ex. promoter deletion mapping with a reporter protein) and using a reporter gene to study protein localization? Select all that apply? o When studying protein localization, a fusion protein is created which consists of both the protein of interest and the reporter protein. D Unlike protein localization studies, when studying gene expression, only the reporter gene is expressed and not the actual...
What is the significance of the gene and protein differences found between Volvox and Chlamydamonas? (e.g., which proteins? what kind of difference?) How do mitochondria enable eukaryotes to reach a level of genetic complexity unattainable by prokaryotes? Describe how the legume-bacteria relationship (symbiosome) compares to our classical view of organelle formation (i.e., mitochondria and plastids). What is similar? What is missing?
ANSWER THE FOLLOWING QUESTIONS 1) What is the relationship between a gene and a protein? 2) How does the tRNA contribute to protein synthesis? 3) The ability of cell to control their gene expression is called 4) What is a promoter? 5) What process convert the message from mRNA into amino acids? 6) The following expressions are true or false? Explain a. "A gene is any DNA sequence that is transcribed to any type of RNA b. "In eukaryotes, a...
Name one primary difference between gene cassettes and composite transposons.
Imagine a transmembrane protein consisting of a single polypeptide chain. The protein has alpha helices that pass through the membrane seven times. Between each segment that passes through the membrane are loops that extend into the cytoplasm or into the extracellular fluid. The C-terminus of the protein extends into the cytoplasm and the N-terminus extends into the extracellular fluid. What is the minimum number of polar stretches* in the primary structure of this protein? *polar stretches are contiguous regions of...
In Genetics, what is the difference between Epistasis and gene suppression?
What is the relationship between protein translation and gene expression? Would you expect to always see correlation between these two? Discuss a circumstance within the context of cancer where mRNA and protein expression may not correlate. Why is it important to look at both protein and RNA levels of a series of genes/proteins in a molecular pathway? Discuss this in the context of cancer associated pathways. Give a specific example of a pathway that is independent of gene expression in...