QUESTION 19 Place the following steps in the expression of the lac operon in the order in which each occurs for the first time after a cell is induced. v A phosphodiester bond is formed between two ribonucleotides. v A peptide bond is formed between the first two amino acids in beta-galactosidase (lac Z). Sigma protein binds to a specific DNA sequence. RNA polymerase ends transcription of the lacA gene. v A protein leaves an operator DNA sequence. v A ribosomal RNA binds to a complementary sequence in mRNA.

Q: 10. a. Describe an operon? b. How lac operons controls gene expression in bacteria

A: (a) An operon is a functional unit of DNA containing a set of genes including structural gene, a…

Q: Cells, including immune cells, degrade mRNA molecules in which no long open reading frame is…

A: An immune cell is a cell that is part of the body's immune system and will help the body fight…

Q: Would the mutation in the blue protein be considered a enhancer or suppressor of the original…

A: Mutation is an event that is responsible for the change in the nucleotide sequence in the DNA of an…

Q: Promoters aid in initiating _____________.

A: Introduction: The process by which RNA (mRNA) synthesizes from the strand of DNA is known as…

Q: The mouse REST gene is under the control of a promoter region which contains alternative promoters.…

A: Ribosomes perform an important function in protein biosynthesis in the cytoplasm. The mRNAs that are…

Q: Examine the following theoretical operon (gen) in E. coli which contains structural genes (genC,…

A: Question 4: No, a null mutation in the regulator gene would not be considered a gain-of-function…

Q: In the lac and trp operons, the repressors are said to be “allosteric molecules” because…

A: Operons are basically the cluster of genes that can be transcribed together to give a messenger RNA…

Q: Please help me iwht this question explain how the regulation of the Lac Operon incorporate both…

A: An operon includes a group of genes that are expressed under the same promoter.

Q: The process in which the two-dimensional structure of RNA from the L region of an operon can either…

A: The strategy of creating an RNA duplicate of a grouping is transcription. The transcript, known as…

Q: Cytosines are methylated most frequently in CG regions in the DNA. Pre-transcriptional control…

A: * In Pretranscriptional Control  DNA methylation and chromatin packing are used. *Example Barr body…

Q: Question 1: While examining a gene related to calcium ion channels in humans (CACNA1S) you discover…

A: D IS THE CORRECT ANSWER. AND EXPLANATION IS GIVEN BELOW .Explanation:

Q: A mutation occurred on the lacI (repressor) gene resulting in a constant production of…

A: Genes are the functional segments of DNA. The cluster of these functional segments called genes is…

Q: If a bacteria cell, that has the lac operon, is metabolizing lactose glucose is absent and…

A: We are answering first question. Pls repost for second question.

Q: What is the name of the site where RNA polymerase binds to the DNA prior to the beginning of…

A:

Q: (Theme 5) AraC is a transcriptional activator that binds to the AraC binding site and is encoded by…

A: The introduction of arabinose into the bacterial culture serves as a trigger for the activation of…

Q: Because of the train track ideas and drawings your friend is convinced that the lac operon is the…

A: Bacteria were shown to adapt to their chemical environment by synthesizing certain enzyme depending…

Q: In terms of the efficient use of bacterial resources, explain why it is necessary for lac operon…

A: Lactose can be broken down by E. coli bacteria to produce glucose and galactose. The lac operon…

Q: QUESTION 19 Which of the following reagents can induce the expression (or turn on) of…

A: The lac operon is a well known regulatory system in bacteria, notably in Escherichia coli (E. coli),…

Q: Prokaryotes use operons to regulate their transcripts. What does it mean for them to be…

A: Prokaryotes are a simpler form of life. It lacks sophisticated machinery and membrane-bound…

Q: The Lac operon is a common example of prokaryotic control of gene expression. In what condition is…

A: Lac operon consists of structural genes such as lacZ, lacY, and lacA which are responsible for the…

Q: hich operons would be functional under these conditions?   What repressors would be made? (NOTE:…

A: Operon is a regulatory unit consisting of cluster of genes containing operator promoter and…

Q: The polycistronic Histidine Operon in E. coli encodes all of the proteins necessary for the…

A: An operon is a gene unit of bacterial system whose transcription is positively and negatively…

Q: Question 2 : With respect to the E.coli Lac operon, the lac repressor is: A. DNA B. RNA C. Protein…

A: DNA

Q: Which of the following sequences best describes the correct (5' – 3') organization of a typical…

A: A typical eukaryotic gene's organisation is a complicated process including a number of regulatory…

Q: What are some of the potential consequences of failure of signal termination?

A: Cell signaling also known as bio signaling that is very important process to under the transit of…

Q: Discuss the consequences that would result in nuclear export/import if Ran GTPase was mutated.

A: Mutations affecting the Ran GTPase, a pivotal regulator of nuclear-cytoplasmic transport, can have…

Q: Do you expect operons to occur extensively in Eukaryotes? Yes or no and explain.

A: Operons (clusters of co-regulated genes with related functions) are a well-known feature of…

Q: 1) The UR operon which is composed of sequences A, B, C, and D (which may or may not be genes of…

A: An operon may be considered as a group of certain genes which function together so as to regulate…

Q: 5) The bacterial Lac operon is an example of transcriptional regulation. What are the major…

A: Using an example of Escherichia coli for the bacterial lac operon. Escherichia coli is a…

Q: You identify a new transcriptional regulator that binds a known sequence of DNA. You are able to…

A: Identify a new transcriptional regulator that binds a known sequence of DNA.Observe the behavior of…

Q: The nascent RNA molecule synthesized during DNA transcription is trimmed (processed) by several…

A: The production of RNA from DNA is known as transcription or gene expression. In eukaryotic cells…

Q: fluctuating Proteolytic cleavage is used to inactivate repressors in an essentially process, such as…

A: Proteolytic cleavage is basically the process of breaking the peptide bonds between amino acids in…

Q: Which of the following applies best to post-translational control?   Question 13 options:…

A: Translation is a process in which synthesis of protein takes place from the mRNA. During protein…

Q: Orca is a new type of E. Coli bacterium. Suppa is a nutrient that Orca needs to survive. Suppa can…

A: The lactose operon, also known as the lac operon, is a gene that is actually needed for the…

Q: 15a) Most amino acid biosynthetic operons in prokaryotes have a structure similar to that observed…

A: The tryptophan operon consists of five structural genes: trpE, trpD, trpC, trpB, trpA that codes for…

Q: Translational control is usually aimed at preventing the initiation of translation. With regard to…

A: The process of translating the sequence of mRNA into an amino acid sequence is called translation.…

Q: Defend or attack this statement: “All eukaryotic promoters have TATA boxes.”

A: Promoter is defined as DNA region where initiation of gene transcription takes place. They regulate…

Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.