As diagrammed below, some amino acid biosynthetic operons have stem loop structures in the mRNA. These structures play a role in the regulation of the operon by which of the following mechanisms? Translation stop codon- Attenuator loop mRNA 5' 3' DNA attenuator trpE O Catabolite repressor protein can bind and prevent the hairpins from forming thus allowing translation to occur. O The leader sequence shown contains codons for the amino acid. When these are low, the ribosome stalls, allowing a hairpin between the two middle regions to form so that the rest of the message can be translated. In the presence of large amounts of the amino acid, the hairpin will wind around the amino acid and prevent further translation. O A repressor protein made of that amino acid will bind to the region and prevent translation when large amounts of the amino acid are present. O The uridine-rich region has codons for that amino acid; when present, this region will be a terminator region. The hairpins allow for an RNA to bind that then allows translation to occur. P Leader peptide coding region U-rich attenuator

Q: The only way that information is extracted out of DNA is through the transcription of MRNAS that…

A: According to our guideline we can answer only the first question. So upload the second question…

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: the folid ing mutations would result in the highest level of lac operon transcription in the absence…

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

Q: Consider a mutant of E. coli that has an inactivating mutation in the gene for the catabolite…

A: The lac operon is a negatively inducible operon.

Q: a mutation that leads to a nonfunctional adenylate cyclase enzyme would lead to what expression…

A: A mutation is a change in the genetic material (the genome) of a cell of a live creature or a virus…

Q: nder what condition will there be more transcription initiation of the Trp operon? O Low tryptophan…

A: mAn operon is a cluster of genes that are transcribed together to give a single messenger RNA (mRNA)…

Q: Describe the structure of the Lac operon. How is it turned on? How is it turned off?

A: The gene products of the lac operon are very important for lactose metabolism. This is crucial for…

Q: If the two trp codons in the leader sequence were mutated to stop codons, what effect would it have…

A: DNA is the preferred carrier of genetic information in most living organisms except for certain RA…

Q: that best fits the phrase below (1-20) Cis-acting B Post-transcriptional modification…

A: Francis Crick proposed central dogma. The RNA is formed from DNA with the help of enzyme RNA…

Q: The arabinose operon How does the araC protein regulate of the arabinose operon. How does its…

A: How arac protein regulate arabinose operon and how binding differ  If arabinose is absent, the dimer…

Q: A bacterial cell is mutated and cannot create the repressor protein associated with the Lac operon.…

A: Lac operon is associated with uptake and metabolism of lactose. It has several components such as a…

Q: operon

A: Answer: Operon: In genetics, an operon is a functioning unit of DNA containing a cluster of genes…

Q: A bacterial cell has very low glucose and lactose is present.  Explain how the lac operon will…

A: Lac Operon -- An operon is a functioning unit of genomic DNA which contains a group of genes…

Q: None

A: The provided diagram represents an mRNA molecule transcribed from an operon, a typical feature in…

Q: You are studying the ABCD operon from a newly isolated bacterium. Which of the following would…

A: A Operon consists of segments of DNA , which carry codes for the synthesis of proteins. These genes…

Q: What is the regulatory region of the Trp operon that is involved in alternative transcription…

A: A set of genes known as the trp operon is discovered in the bacteria E. coli and codes for the…

Q: You have created a deletion of the ribosome binding site for the leader sequence of the trp operon.…

A: trp stands for tryptophan operon.In trp operon, there are 5 structural genes viz., trp E, trpD,…

Q: Which of the following arabinose operon regulatory sites is exclusively involved in the repression…

A: Answer - Option B - ara O2

Q: The role of allolactose in the lac operon

A: Lac Operon:This is a classic example of a gene regulation system found in E. coli.The key…

Q: explain this image for the ecoli bacteria mutation trpE

A: Introduction The trp operon is a type of operon system found in E. coli bacteria. The trp operon…

Q: One way that regulation is often studied is by examining the effects of mute ons. For example,…

A: There are two types of lac mutations occurring in lac operon: 1. uninducible - operon can't be…

Q: Outline the operon theory using the lac operon as anexample

A: Operon consists of genes placed in sequential order. Lac operon has following genes- Regulator gene…

Q: 2. The promoter (P) is the start site of transcription through the binding of RNA polymerase before…

A: The lac operon: The lac operon or the lactose operon is the most widely studied gene with respect to…

Q: An operon is a group of genes under the control of a single promoter. Match each type of operon with…

A: Introduction :- An operon is a functional piece of DNA in genetics that houses a collection of genes…

Q: ac operon.  Drag the listed molecules to their corresponding bin. Reset Help   ONPG IPTG X-Gal…

A: ONPG - beta-galactosidase cleaves this molecule to form a visible yellow product. Explaination:  The…

Q: The following diagram depicts the elements at the: Ba cgcc tataan 999 AC ATT BRE TATA box Inr DPE…

A: The diagram depicts  elements at the Promoter  :

Q: The DNA sequence before the protein coding region that determines when a gene is used is called the…

A: DNA is the genetic material of many organisms including the humans. The DNA contains information…

Q: Regarding the tryptophan operon in bacteria, in the presence of tryptophan, tryptophan binds to the

A: Q. Regarding the tryptophan operon in bacteria, in the presence of tryptophan, tryptophan binds to…

Q: Which RNA conformation favors transcription—the form with the antiterminator stem-loop or the form…

A: Genes are basic physical and functional unit of heredity. It is a part of DNA that has instruction…

Q: An activator (protein “V” – not encoded by this operon) binds to the activating region and RNA…

A: A transcriptional activator is a protein (transcription factor) that increases gene transcription of…

Q: Which of the following arabinose operon regulatory sites is exclusively involved in the repression…

A: Operon is a gene regulatory structure that contains clusters of genes and these clusters of genes…

Q: Explain and give an example (lac operon) of how inducer operons function in prokaryotes.

A: Prokaryote are organisms that lacks a distinct nucleus and other organelles due to the absence of…

Bacterial Genomics

The study of the morphological, physiological, and evolutionary aspects of the bacterial genome is referred to as bacterial genomics. This subdisciplinary field aids in understanding how genes are assembled into genomes. Further, bacterial or microbial genomics has helped researchers in understanding the pathogenicity of bacteria and other microbes.

Transformation Experiment in Bacteria

In the discovery of genetic material, the experiment conducted by Frederick Griffith on Streptococcus pneumonia proved to be a stepping stone.

Plasmids and Vectors

The DNA molecule that exists in a circular shape and is smaller in size which is capable of its replication is called Plasmids. In other words, it is called extra-chromosomal plasmid DNA. Vectors are the molecule which is capable of carrying genetic material which can be transferred into another cell and further carry out replication and expression. Plasmids can act as vectors.