The experimental growth of an eye on the leg of a fruit fly is most famous for providing direct evidence that________ Select one: a. proteins are involved making eyes b. genes are involved in making eyes c. one operon can control many genes d. genes are regulated via negative feedback e. that one transcriptional factor can regulate many genes

Q: What is the effect of high levels of glucose on the lac operon?a. Transcription is stimulated.b.…

A: An operon is found in bacteria and viruses as a genetic regulatory system. The gene coding for…

Q: In humans, bone cells and nerve cells have very different functions and produce different sets of…

A: it happens because of expression.

Q: As trytophan levels increase in the cell, _____ bind(s) to active aporepressors, causing ______ of…

A: trp operon:  The trp operon codes for the components required for tryptophan production. An operon…

Q: A double stranded region of RNA that can stall ribosomes is a(n) A. repressor sequence B. operator…

A: The RNA is produced from the DNA by transcription process and this RNA is used during the…

Q: If glucose is absent, but so is lactose, the lac operon will be ________. a. activated b. repressed…

A: An operon is a genetic regulatory system found in bacteria and their viruses. Here, the gene coding…

Q: The key to epigenetic regulation is ________.   a. controlling accessibility to transcription…

A: Epigenetic regulation of a gene is the interaction by which the activity of a specific quality is…

Q: Kinesin is a ______ and p53 is a ____ Select one: a. motor protein, transcription factor b.

A: ANSWER a) motor protein and transcription factor.

Q: How does the Trp operon work? A. Binding of Trp to a repressor protein allows the repressor to bind…

A: Trp operon is the cluster of genes that are responsible for synthesis pf operon

Q: Which of the following is NOT found in a prokaryotic genome?   A. tRNA genes   B. Operons   C.…

A: There are 2 types of living cells present on earth, prokaryotic cells and eukaryotic cells.…

Q: Positive regulators are called: A. Repressors  B. Activators C. Enhancers D. None of the above

A: Transcription is a process by which the RNA is synthesized from the DNA sequence. RNA polymerase is…

Q: Operons______ . a. only occur in bacteria b. include multiple genes c. involve selective gene…

A: The correct answer is (b) include multiple genes

Q: In prokaryotes, the trp operon is under ________ that ________ prevents RNA polymerase from binding.…

A: Amino acids are required for bacteria like E. coli to sustain. E. coli can ingest tryptophan, which…

Q: Examining the DNA of a cancerous cell, a scientist would find strong expression of A. siRNAs. B.…

A: Option c i.e. oncogenes is the correct statement for the above question.

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: In order for the lac operon to be triggered, lactose must be present and ________.   a. cAMP levels…

A:

Q: gene in liver cells is "off". In the presence of a toxin, a repressor is removed and the gene is…

A: Repressor It refers to a protein which is invoved in the regulation of gene expression. This protein…

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: A geneticist mutates the TATA binding protein (TBP) gene in cultured human cells.  This mutation…

A: Transcription is the synthesis of mRNA from DNA. The TATA-binding protein (TBP) is a general…

Q: Operons encoding catabolic enzymes are often _______, while those encoding anabolic enzymes are…

A: Answer - Option B - Activated by their enzymatic substrate; inhibited by the presence of their…

Q: Eukaryotic transcription has the following regulatory upstream element (region) in addition to…

A: In Eukaryotic transcription, the cells undergo several steps for copying genetic information present…

Q: Kinesin is a Select one: and p53 is a a transcription factor, motor protein b. kinase, motor protein…

A: Kinesin protein moves along the microtubules in the cell. It consists of two heavy and two light…

Q: Proteins that influence RNA synthesis by binding directly to DNA are called_____ . a. promoters c.…

A: The conversion of the DNA into the mRNA is termed as the transcription and the conversion if this…

Q: In a bacterial operon, the active repressor bind to the   A. promoter.   B. terminator.   C.…

A: The operon concept can be defined as a DNA containing a set of genes that are transcribed basically…

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 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 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…

Q: Which of the following DNA elements or proteins would you expect to find only in some cells in a…

A: Enhancers are defined as cis-acting DNA sequences that can increase the transcription of genes.…

Q: During gene expression, which information flows in the correct order?   A. RNA --> Transcription-->…

A: Genes are the basic structural and functional unit of heredity. They carry coded genetic information…

Q: Oocytes contain inactivated ______ that become activated soon fertilization.  The mechanism that…

A: An essential step at the beginning of embryo development during fertilization is oocyte activation.…

Q: In terms of gene expression, the regulation of lac operon is an example of? A.…

A: In bacteria, an operon is a collection of genes that are transcribed as a single mRNA molecule by a…

Q: The Trp peron of genes encoding enzymes for Trp synthesis, is which of the following? Select one:…

A: The trp operon consist 5 structural genes that encodes enzymes needed for synthesis of the amino…

Q: A mutation occurs in the lac operon operator site such that LacI can no longer bind to the operator…

A: Lac I stands for lac inhibitor. It's major function is to turn off the lac operon in the absence 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.