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: Under which conditions does the trp repressor block transcription of the trp operon? when the…

A: The trp operon responds to a repressor protein that binds to two molecules of tryptophan. When the…

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: Which of these statements best describes the major difference between enhancers and promoter…

A: Enhancer sections are regulator DNA regions that promote the transcription of a linked gene when…

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: Question 1: The segmentation of eukaryotic genes into exons and introns presents an opportunity for…

A: Splicing occurs during protein synthesis, and involves cutting out and rearranging sections of mRNA.…

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: It has been proposed that thiogalactoside transacetylase (LacA in the lactose operon) plays a role…

A: The lactose operon is an operon required for the transport and metabolism of lactose in E.coli and…

Q: (Theme 5) You are testing the role of three proteins (Protein A, Protein B, and Protein C) which…

A: The electrophoretic gel electrophoresis mobility shift assay is also known as EMSA.This assay is…

Q: The following question refers to the transcriptional control of the Gal7 locus in Saccramyces…

A: "Genes" are the fundamental unit of heredity. They store genetic information in the form of DNA,…

Q: The diagram below represents the tryptophan operon with the trp leader MRNA transcript eniarged to…

A: Gene regulation at the level of transcription in bacteria is achieved by the operon model. Operon is…

Q: The lac repressor in bacteria and when lactose is present, the lac genes O Inhibits transcription of…

A: The lac repressor inhibits the transcription. In lactose metabolism, the lac operon is very much…

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

A:

Q: Listed in parts a through g are some mutations that were found in the 5′ UTR of the trp operon of E.…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

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: When cAMP binds to the Catabolite Activator Protein (CAP), it causes a conformational change on the…

A: The lac operon will be expressed at high levels if the following two criteria are met: Glucose must…

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: Removal of the signal peptide and C peptide from pre-proinsulin to ultimately form insulin.…

A: The eukaryotic gene regulation involves different steps, both the transcription and translation…

Q: Can you explain in technical detail how global control mechanisms of catabolite repression work?

A: Bacteria have a metabolic control mechanism called catabolite repression that enables them to adjust…

Q: QUESTION NUMBER: 23 Transcription of the zygote nucleus is dispensable in Drosophila early…

A: As insects are globally distributed and have ecological relevance, the ability to extrapolate…

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: 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: 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: There is a specific enzyme that adds the 5' Cap to mRNA. If an inhibitor of this enzyme were added…

A: Cap in RNA is a molecule of 7 methyl guanosine at 5' end.

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: Question 1 Capping a pre-MRNA transcript and adding poly-A tail to its 3' end occurs in A eukaryotic…

A: Poly A tail is added to 3' end of the pre- mRNA once elongation is complete.  The polyA tail…

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: on ni aliuzen en B. Gene A contains a base substitution that results in a nonsense mutation. HTW…

A: A non sense mutation is the one where a codon is converted to stop codon and there is premature…

Q: Transcription factors bind to:   Question 20 options:   DNA regions called…

A: Transcription factors bind to:      DNA regions called cis-acting elementsExplanation:The question…

Q: The diagram below represents the tryptophan operon with the trp leader mRNA transcript enlarged to…

A: The trp operon is operated in most bacteria including E. coli which is a repressible operon. This…

Q: True or false: The lac operon is regulated by the binding of an enhancer to sequences just upstream…

A: The lac operon is associated with the transport and metabolism of lactose in E.coli specially. The…

Q: What is the Shine-Dalgarno sequence?   Question 15 options:   A consensus sequence in prokaryotic…

A: The process by which mRNA is produced from DNA is called transcription and the process by which…

Q: QUESTION 4 What is the name for the complex that forms when many ribosomes translate the same MRNA…

A: The name of complex that forms when many of ribosomes translate the same mRNA at same time is called…

Q: You are a scientist studying drug resistance in cancer. You are particularly interested in ABCB1, a…

A: Cancer causes the uncontrolled growth of abnormal cells and dynamic altering in the genome. Common…

Q: Which of the following are the enzymes involved in post-transcriptional modification?   Question…

A: The objective of the question is to identify the enzymes involved in post-transcriptional…

Q: Which of the following is correct in prokaryotes? O All operators are cis elements. O All gene…

A: The correct answer is option 4th i.e.All Promoters require a trancriptional activator protein.

Q: Question 3  3.  What will happen when a deletion mutation occurs in the promoter of the tryptophan…

A: Tryptophan operon The tryptophan operon or trp operon is an operon which is a group of genes that…

Q: Question 28 Introns Protein-coding sequences that need to be excised B Non-coding regions that need…

A: Introns -- Introns are described as nucleotide sequences in DNA and RNA ,do not directly code for…

Q: Which of the following is REQUIRED FOR co-translational import into the rough ER? O A signal peptide…

A: Endoplasmic reticulum is the cell organelle which play the important role in the regulation of…

Q: Which of the follow general transcription factors contains the protein TBP and binds to TATA box…

A: The correct answer is: a. TFIID TFIID is a general transcription factor that contains the…

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.