Which of the following best explains how the prokaryotic expression of a metabolic protein can be regulated when the protein is already present at a high concentration?   a.Repressor proteins can be activated and bind to regulatory sequences to block transcription.   b.Regulatory proteins can be inactivated to increase gene expression.   c.Transcription factors can bind to regulatory sequences to increase RNA polymerase binding.   d.Histone modification can prevent transcription of the gene.

Q: A geneticist induces a mutation in eukaryote cells. The mutation results in an inability to form the…

A: Mutation results in alteration of a nucleotide sequence of DNA which caused due to the mistake in…

Q: Changes in a cell that affect micro RNAs lead to cancer because miRNAs... a. help a cell to…

A: Cancer can occur when- apoptosis( programmed cell death) is distributed, inhibition of growth…

Q: egulatory proteins in Prokaryotes shut off transcription by binding to a site immediately in front…

A: In the given question options are given in accordance to regulation of transcription in prokaryotic…

Q: Which of the following is the best description of a transcription factor? A. A protein that brings…

A: Transcription is the process which leads to conversion of DNA to RNA. One distinguishing aspect of…

Q: Why is regulating transcription the main way that cells control gene expression?     A. Because…

A: Transcription is the process in which RNA is synthesized with the help of RNA polymerase enzyme. RNA…

Q: Give two DIFFERENT examples of how the following can occur: a. A point mutation in an exon that is…

A: Silent mutation - Silent mutations are mutations in DNA that do not have an observable effect on the…

Q: Exposing Escherichia coli (e.coli) to ionizing radiation results in DNA damage. Say you perform an…

A: Gene expression is the process by which information from a gene is used in the synthesis of a…

Q: Comparative proteomics involves comparing the proteomes from two different cells or tissues from…

A: DNA carries genetic information required for the survival of living organisms. The complete set of…

Q: Which of the following is true of CpG islands? a. They are methylated near promoters of actively…

A: Deoxyribonucleic acid is a molecule composed of two polynucleotide chains. It coils around each…

Q: Which of the following plays a major part in determining whether or not RNA polymerase will…

A: RNA polymerase is an enzyme that helps to convert a DNA sequence into an RNA sequence in the…

Q: Gene expression regulation by methylation of the cytosines in a promoter would be considered

A: Answer - Option B - Transcriptional regulation

Q: The gad operon is controlled by a number of transcription factors that regulate a promoter of…

A: Bacteria re found in prokaryotes. They are more primitive as compared to eukaryotes.

Q: How does the lac operon regulate lactose digestion in bacteria?a. The repressor protein becomes a…

A: The lac operon of E. coli contains genes concerned with lactose metabolism. It's expressed only if…

Q: What is the role of a substrate that controls a repressible operon?   a. increase the production…

A: Operon is the segment of DNA. It consists of structural genes, regulatory, promoter and operator…

Q: Which of the following does not accurately describe eukaryotic transcriptional factors? a. Changes…

A: Introduction Transcription factors are the proteins that specifically are involved in the…

Q: Which of the following statements about methylation and acetylation is correct? A. Genes that have…

A: Introduction Deacetylation is the removal of an acetyl group and occurs on a plethora of targets and…

Q: Which of the following is NOT a description of an epigenetic modification? A. regulatory patterns…

A: Changes in gene expression that are not produced by changes in DNA sequences but are caused by…

Q: What is the difference between a structural gene and a regulator gene? a. Structural genes are…

A: Gene is the hereditary unit occupying a specific position in the chromosome and carries…

Q: Which of these is used in the transcription of all genes? Choose all correct answers.         A.…

A: Transcription is the process in which RNA strand is synthesized with the help of template strand of…

Q: Eukaryotic cells have multiple complex mechanisms for the regulation of gene expression, but a…

A: Answer :- a) Operons Explanation - Eukaryotic genes aren't organized into operons, therefore every…

Q: Operons involved with the biosynthesis of molecules such as amino acids are most likely to be…

A: A repressible operon encodes for anabolic enzymes. The genes that encode these anabolic enzymes tend…

Q: Which of the following is generally true about eukaryotic gene regulatory regions? a. All regulatory…

A: Genes are the segments of DNA that code for polypeptide chains. The expression of the genes in…

Q: Which of the following gene regulation mechanisms are found ONLY in prokaryotes?   a. coordinate…

A: DNA modifications can happen in both prokaryotes and eukaryotes, Transcriptional and Translational…

Q: Which of these is NOT true of nucleosomes?     A. Some post-translational modifications to histone…

A: Nucleosome is the basic subunit of chromatin. It is the basic unit of DNA packaging. Nucleosomes…

Q: Histone deacetylase (HDAC) enzymes   a.Promote initiation of translation. b.Complex with…

A: DNA is the nucleic acids present in the organisms. DNA is the deoxy ribose nucleic acid in which…

Q: In which of the following does nitrogenous base pairing (base complementarity via hydrogen bonds)…

A: Nitrogenous base pairing can include DNA-DNA, DNA-RNA, RNA-RNA pairing. Both DNA and RNA are made up…

Q: Hac1 is another chaperone protein that is up-regulated in response to unfolded proteins in the ER.…

A: Introduction  Proteins are essential biomolecules that play a wide range of roles in controlling…

Q: Which of the following is true about operons?   A. Contains a cluster of genes transcribed as…

A: An operon is a functional unit of transcription and genetic regulation, which occur primarily in…

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.