What is the order of events leading to initiation of transcription in prokaryotes? Sigma factor DNA binding > RNA Pol DNA binding > open complex formation > promoter escape Promoter escape > open complex formation > RNA Pol DNA binding > Sigma factor DNA binding O Open complex formation > RNA Pol DNA binding > Sigma factor DNA binding > promoter escape O RNA Pol DNA binding > sigma factor DNA binding > open complex > promoter escape

Q: When tryptophan levels are high in E. coli, what conformation does the trp leader mRNA adoptand what…

A: The question is asking about the effect of high tryptophan levels on the conformation of the trp…

Q: You are studying a eukaryotic protein PKK in the lab. You fuse the DNA encoding GFP (green…

A: Proteins synthesized through translation process is directed to specific locations in the cells.…

Q: How are the following components in the trp operon system affected by a mutation in trpC?  (trp…

A: Regulatory proteins are proteins that provide regulatory activities in processes like transcription.…

Q: Escherichia coli is grown in the presence of 20 mg of glucose and 20mg of lactose as carbon sources.…

A: Diauxic growth is the two phasic growth of bacteria as two different carbon source is present. As…

Q: 1. Peroxisomes are organelles surrounded by a single membrane. Soluble proteins that reside within…

A: Answer a)  If we do mutation at the c terminus skl tripeptide signal sequence then this protein will…

Q: CRITERIA PROKARYOTE EUKARYOTE Site of Transcription Initiation of Transcription Termination of…

A: The manner by which genes express themselves is known as the core dogma of life. The way in which…

Q: Operons are a common feature of bacterial genomes. Which of the following statements about the lac…

A: Lac operon has three important genes that helps the bacteria to take up the lactose sugar when…

Q: O mediator complex O histones RNA polymerase enhancer

A: Transcription is the process by which the information of a strand on the DNA is replicated by its…

Q: Given that the the trp operon is a negative repressible operon what happens to the trp repressor in…

A: Introduction  The lac operon model is a classic example of gene regulation in prokaryotic cells. The…

Q: P₁0 ORF1 t₁ ORF2 ORF3 t₂ The diagram above illustrates an operon that is regulated by the RepR…

A: An operon is a group of genes and the regulatory elements that regulate the expression of those…

Q: Which of the following statements are false about prokaryotic transcription? In bacteria,…

A: Transcription is the production of RNA from the DNA template strand. It is also known as gene…

Q: A researcher discovered Suramin as a potent and selective inhibitor of Mycobacterium tuberculosis…

A: Surarnin is a potent and selective inhibitor of the RecA protein in Mycobacterium tuberculosis (Mtb)…

Q: Which process is illustrated in the diagram? Replication Transcription RNA processing Translation…

A: We are given an image of circular double stranded DNA with unwinding of two strands at one point.…

Q: Choose the effect of the given agents to translation or transcription. Choices: RNA polymerase…

A: Translation is the process in which ribosomes in the cytoplasm or endoplasmic reticulum synthesize…

Q: eron ns are only produced certain molecules are und in the cell. eron = are only read when molecules…

A: Positive genetic regulation refers to the type of regulation mechanism that enables the expression…

Q: Which feature (antibiotic target) of bacteria seems to be the most resistant to antibiotics? Why…

A: Antibiotics are the substances or anti microbial substances that are produced by one microbe and…

Q: The following events are those of RNA-directed RNA synthesis in Escherichia coli. Place the events…

A: RNA-directed RNA synthesis is the process by which RNA molecules are synthesized using RNA as a…

Q: cAMP binds to cAMP Receptor Protein (CRP), allowing CRP to bind to the promoter of the lac operon

A: Almost all bacteria such as E. coli contains lac operon which operates in utilization of lactose as…

Q: Which of the following antibiotic resistance mechanisms are most likely to be encoded by a single…

A: Any substance which is produced naturally, artificially, or through a synthetic origin that kills or…

Q: Based on the following wild type sequence, indicate if each of the mutations should be classified as…

A: Mutations are changes in the sequence of DNA which may or may not affect the phenotype of the…

Q: Select the correct statement about the trp operon: high levels of tryptophan promotes high…

A: Introduction :  Lac Operon is a collection of genes with a single promotor that encodes genes for…

Q: What are the effects of the following conditions on Lac operon of bacteria? Do not forget to mention…

A: Lac Operon helps in the metabolism of lactose in bacteria.

Q: Lac Repressor A Operator Lac Y eene Promoter Lac Z eene Lac A gene В Lac Y eene Lac A gene Promoter…

A: Lac operon consists of a group of genes that codes for a protein that allows bacteria to use lactose…

Q: Which molecules act as co-repressor for pur respressor in prokaryotes?

A: Co repressor- It's a substance which inhibits the gene expression.A co repressor downregulates the…

Q: Give 7 examples where a specific nucleotide sequences/elements are recognized by protein or…

A: Replication is the process by which new strands of DNA are synthesized from pre-existing DNA.…

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: Which of the following statements is/are true about gene regulation in bacteria? Choose all that…

A: Gene regulation refers to the mechanisms that act to induce or repress the expression of a gene. It…

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: The lac operon has 4 genes, I, Z, Y and A. For each scenario, tell me the result of the mutation,…

A: The lac operon is an operon or group of genes with a single promoter. The genes in the operon…

Q: Most bacterial repressor proteins are allosteric. Which of the following binds with the repressor to…

A: Genes are naturally accessible for transcription in bacteria, but repressor enzymes proactively turn…

Q: How is a corepressor different from an inducer? How is it similar?

A: A gene is a DNA-based functional heredity unit that delivers instructions for the production of RNA…

Q: Matching type Choices are in the picture 1. Puromycin 2. Amanitin 3. Tetracycline 4. Rifampicin…

A: DNA acts as the genetic material in most organisms. DNA is first transcribed into mRNA with the help…

Q: At 2:00 pm, you measured intracellular arginine at 100M. After addition of 200M of arginine to the…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: How does the sigma factor of E. coli RNA polymerase bind to promoters? Question 10 options: a…

A: Two grooves of DNA are formed by an antiparallel arrangement of DNA strands. They are sites for…

Q: how would alterning patterns of gene expression in prokaryotes would most likely serve an organism's…

A: Point mutations A point mutation means change in the single nucleotide base pair in DNA sequence.…

Q: Examining Figure 11-21, what effect do you predict trpAmutations will have on trp mRNA expression?

A: This is all about tryptophan operon. This operon consists of group of genes placed together that…

Q: How do repressors reduce transcription of an operon? A) recruit RNA polymerase to promoters B)…

A: Repressors are the proteins that has a negative effect on the expression of gene. These are those…

Q: Which of the following accurately describes the function of HOTAIR? O It is a long non-coding RNA…

A: Option 1 is the correct answer.

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: What is the predicted function of the Duffy gene? O Cell Adhesion Molecule O Microfilament RNA…

A: Gene is the basic structural and functional unit of heredity. A gene exists as two alternative forms…

Q: Which of the following small GTP-binding proteins does NOT play a role in cell migration during…

A: Introduction : Cell migration is the movement of a cell or group of cells for regeneration,…

Q: Which one of the following is not associated with transcription? * O sigma factor O hairpin loop…

A: Transcription is a process of making a RNA copy from sequence of DNA. Transcription is the process…

Q: The following diagram depicts the elements at the: Ac TTC g99 Eca cgcc tataan ATT BRE TATA box Inr…

A: The core promoters are contiguous DNA sequences sufficient to initiate the accurate initiation of…

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.