In prokaryotes, the sigma factor recognizes base sequences in the . which facilitates RNA polymerase binding and initiates RNA synthesis. (A) enhancer B regulatory sequence c promoter operator

Q: promoter DOWN mutation is a mutation DA) Leading to a shorter RNA molecule B) Leading to less or no…

A: Mutation is abrupt changes in the DNA nucleotide sequences that may bring about changes in the amino…

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

A: Repressor binding physically  blocks RNA polymerase from transcribing  structural genes.

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: Operons can not be:   a. Negatively regulated b. Positively regulated c. Constitutive d. Inducible…

A: The workhorses of a body are proteins. All or every function of the body are carried out by the…

Q: Match each of the following descriptions to the type of regulatory RNA affecting a "target" gene…

A: Of course! Let's break down each match:This regulatory RNA may increase transcription of the target…

Q: If you add a co-eepressor to a repressor protein and that allows it to bind the operator is this a…

A: Inducible operon is one that is expressed in the presence of inducer. Constitutive operon is the…

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: Explain how the ncRNA known as HOTAIR plays a role in gene repression.

A: RNA (Ribo Nucleic Acid) is the genetic material found in prokaryotes and eukaryotes. It is the prime…

Q: Compare and contrast the roles of a corepressor and an inducer innegative regulation of an operon.

A: Gene regulation is the process through which the cells control the expression of genes. It controls…

Q: d) What would happen if the majority of DNA between the enhancer and site of RNA pol binding was…

A: Gene expression is a multistep process involving replication, transcription, and translation as the…

Q: i)Describe attenuation control and how it is used to regulate gene expression. ii)Give a specific…

A:

Q: E. coli are grown on a medium containing lactose. Once glucose is added to the medium, the bacteria…

A: In bacterial cells, the regulation of gene expression plays a crucial role in adapting to changing…

Q: Which of the following statements is not true of both the LacI and TrpR repressor proteins?a) an…

A: The objective of the question is to identify the statement that is not true for both LacI and TrpR…

Q: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an…

A: Transcription factors are the class of nuclear proteins that facilitate transcription. It is studied…

Q: You are studying a new gene that is expressed within the adipose tissue of humans during the…

A: "Genes" can store genetic information in the form of DNA, which may be converted into functional…

Q: radioactively labeled cDNA is used to probe RNA isolated from kidney by Northern blotting. Two bands…

A: Northern blotting is a laboratory technique used to detect and analyze specific RNA molecules. It…

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: Which of the following is false when the genes of the Lac operon are being tran- scribed in high…

A: Lac operon is a set of genes used by E.coli to metabolize lactose when glucose is not available for…

Q: A cell that has a mutation that increases the catalytic rate of RNA Polymerase II will likely have…

A: A cell that has a mutation that increases the catalytic rate of RNA Polymerase II will likely have…

Q: 1. Contents of the diagram below was discovered in the 1960s. Explain in detail what this diagram is…

A: Transcription is defined as the process by which the information present in a strand of DNA will be…

Q: Define operon and explain the functions of the operator and promoter regions.

A: To save resources as well as energy, an organism controls its gene expression process. An organism…

Q: In the lac operon, how would gene expression be affected if each one of the following segments was…

A: The lac operon is basically a group of genes with a single promoter whose genes encode proteins that…

Q: Describe the difference between a repressible and an inducible operon.

A: The theory of Operon comes from the concept of "gene-regulation"  proposed by Jacob and Monod. It is…

Q: A TATA box is a short, A-T rich sequence of nucleotides located just upstream of genes and is used…

A: Transcription refers to a process in which RNA is synthesized from DNA template. Only one DNA…

Q: Which of the following is/are true regarding transcription initiation in bacteria? I. TFIID will…

A: To start transcribing a gene, RNA polymerase binds to the promoter region of the gene's DNA.... The…

Q: Differentiate inducsible and repressible operon

A: The promoter and operator control the group of genes which are called operons. Some operons are…

Q: What would you expect to happen if you mutate a transcription factor binding site in a promoter?

A: A mutation is a sudden change in the structure of DNA. If we mutate a transcription factor then it…

Q: A strain of bacteria possesses a temperature-sensitive mutation in the gene that encodes the sigma…

A: The microbiology studies about both the diseases causing microbes and beneficiary microbes, about…

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.