why Penicillin inhibits PBP activity in wild-type cells

Q: The map of the lac operon is shown below. Consider the following examples that include both haploids…

A: Lac operon is the segment of DNA which includes regulatory gene, structural gene, promoter gene and…

Q: Discuss how scientists employ a bacteriophagesite-specific recombination system to generateknockin…

A: Knockin mouse is a method in gene recombination in which an exogenous gene of interest is inserted…

Q: Suppose that E. coli sustains a mutation in its gene for the lac operon repressor such that the…

A: An operon is the unit of bacterial gene expression and regulation. The operon contains the…

Q: What would happen if the operator sequence of the trp operon contained a mutation that prevented the…

A: Trp Operon is an operon that codes for the components for the production of Tryptophan, it consists…

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 following shows the genotype of a partial diploid bacterial cell - where one chromosomal region…

A: The lactose operon is a cluster of genes present in E. coli and other bacteria that are specifically…

Q: What is meant with some plasmids carry an ampR gene

A: Plasmids are small extrachromosomal DNA molecules present in Bacteria. These circular double DNA…

Q: What would happen to the regulation of the tryptophan operon in bacterial cells that express a…

A: In E. coli, all the 20 amino acids can be synthesized in vivo by the organism. The genes for the…

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

A: Introduction  An operon is a DNA functional unit that comprises a cluster of genes regulated by a…

Q: Which of the following lac operon genotypes would allow for functional versions of all the…

A: lac operon: - Inducible system - Both positive and negative regulation. - Involved in lactose…

Q: For the following E.coli genotype   trpR- trpP+ trpO+ trpE- / trpR- trpP+ trpO+ trpE+ the…

A: Tryptophan operon found in E.coli and some other bacteria. It is a group of genes that encodes for…

Q: Why reverse transcriptase is used ?

A: Viruses can have either DNA or RNA as its genetic material. The DNA or RNA can further be single…

Q: Parts A-C show the genotypes for partial diploid strains of the lac operon. Gene names have been…

A: (a) I-P+O+Z+Y:- The I- allele means the lac repressor is inactive, so the lac operon is…

Q: Please discuss positive regulation with respect to lac operon.

A: An expression of a gene is evidenced by the synthesis of the polypeptide chain encoded by the…

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: St

A: Answer-- RAD51 is a protein coding gene.RAD51 plays significant role in homilogouh recombination of…

Q: Why can it be said that transcription of thebacteriophage T7 genome requires two enzymes?

A: T7 bacteriophage is a small phage which consists of double stranded DNA with 40 kbp nucleotide. The…

Q: Inhibitors for this reverse transcriptase fall in two classes: nucleoside analog inhibitors (NRTIs)…

A: Reverse transcriptase is an enzyme that synthesizes DNA from RNA. Reverse transcriptase catalyzes…

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: what is the purpose of arabinose for the gfp gene?

A: Arabinose is a constituent of many biopolymers that make up the plant cell walls.it is a…

Q: Give all possible genotypes of a lac operon that produces, or fails to produce, β-galactosidase and…

A: An operon is defined as a group of genes that have a common promoter and regulator and also…

Q: In terms of the trp operon, differentiate between two normal bacterial cultures, one grown in a…

A: The trp operon, found in E. coli bacteria, is a group of genes that encode biosynthetic enzymes for…

Q: Laz Z Lac Z Lạc Y Lac Y Genotype -lactose +lactose -lactose +lactose a. I+P+O+Z-Y+/F I+P+O^S Z+ Y-…

A: A set of genes present in E.coli. that regulates the uptake of lactose from the surrounding…

Q: Explain the role of the araC and CAP proteins in the regulation of the ara operon under the…

A: CAP is a catabolite activator protein.  It a dimer & causes positive control of Ara operon. CAP…

Q: A microbial geneticist isolates a new mutation in E. coliand wishes to map its chromosomal location.…

A: A mutation is a sudden change in the DNA sequence. Mutations can result from mistakes during DNA…

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: Suppose you have six strains of E. coli. One is wildtype, and each of the other five has a single…

A: Escherichia coli (E.coli) has the following five mutant strains. Lac Z-, lacy-, lacl-, Oc, and…

Q: Table 20-2 Diploid Analysis of Mutations Affecting the lac Operon Phenotype with Inducer Absent…

A: Lac operon is involved in the lactose utilization. It has a promoter, operator, three structural…

Q: Mitochondrial DNA is especially vulnerable to ROS. Suggest several DNA-protecting mechanisms that…

A: Mitochondria is a biological organelle that produces most of the ATP needed for the cell via the…

Q: This question combines your knowledge of bacterial conjugationand the genetic regulation that…

A: The lytic cycle of the virus is referred to as the cycle in which the virus infects the host cell,…

Q: The symbols A, B, C, D, E represent all the components of the lac operon, excluding LacA. The…

A: The lac operon regulates gene expression in lactose metabolism in E. coli. It is composed of a…

Q: Suppose that E. coli sustains a mutation in its gene for the lac operon repressor making the…

A: When lactose is not present in the medium operon does not transcribe because of the presence of lac…

Q: Examining Figure 11-21, what effect do you predict trpAmutations will have on tryptophan levels?

A: The aldol cleavage of indoleglycerol phosphate to indole and glyceraldehyde 3-phosphate is carried…

Q: Suppose that E. coli sustains a mutation in its gene for the lac operon depressor making the…

A: A lac operon is a group of genes with a single promoter ( it is transcribed as a single mRNA). The…

Q: Trp operon of E. coli is an inducible sytem since it turns on in the presence of tryptophan. In most…

A: DNA codes for proteins, which occur in three stages: replication, transcription, and translation.…

Q: A haploid E. coli cell has the genotype I ¯ P+ O+ Z+ Y ¯ where the I ¯ indicates that the repressor…

A: The question is asking us to determine which statements are correct about an E. coli cell with a…

Q: Why is generalized transduction able to transfer anygene, but specialized transduction is restricted…

A: Introduction: transduction is a process of gene transfer in bacteria from donor to recipient…

Q: Conjugating E. coli was discovered to have an F factor aka Fertility factor.  Explain what type of…

A: Bacterial conjugation is a process through which the DNA is transferred from the living cell into…

Q: The symbols a, b, and c in the table below represent theE. coli lac system genes for the repressor…

A: Answer a. a = lacO; b = lacZ; c = lacI .   Explanation: You've been told that a, b, and c stand for…

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