Q: 10. a. Describe an operon? b. How lac operons controls gene expression in bacteria
A: (a) An operon is a functional unit of DNA containing a set of genes including structural gene, a…
Q: 2. In your own words, describe two different reasons why a eukaryotic cell may need to control gene…
A: gene expression is a process to regulate the production of active gene to produce the proteins to…
Q: 2. What does an operon typically consist of? a. an operator, a promoter, and a cluster of genes b. a…
A: Introduction :- An operon is a group of genes that are transcribed together to produce a single…
Q: 20. Explain the effect of the mutation that occurs among northern European people on LCT gene…
A: LCT gene is the lactase gene in humans. Lactase is an enzyme that helps in breaking down the…
Q: 2. Distinguish among inducible, repressible, and constitutive gene operons.
A: An operon is a functional unit of genomic DNA that comprises a collection of genes that are all…
Q: 5. What messages does a gene provide? And how is the language of the gene expressed?
A: A gene can be defined the basic physical and functional unit of heredity. They are made up of DNA.…
Q: 6. Initiators of what enzyme start the destruction of the apoptotic pathway(s) in a cell? A.…
A: Apoptosis is a natural biological process of planned cell death in which cells destroy themselves in…
Q: Compare the control of gene regulation in eukaryotes and prokaryotes in terms of: a. transcription…
A: Prokaryotes and eukaryotes change their Gene articulation with respect to their environmental…
Q: Contrast positive versus negative regulation of gene expression. Describe the role of the repressor…
A: Positive and negative control of gene expression In some cases, the product of a regulatory gene is…
Q: 4b. Briefly describe the changes in gene expression that happen in the lac operon when lactose is…
A: 4b- lac operon: - Inducible system. - Both positive and negative regulation. - Involved in lactose…
Q: 5. In the experiment of cell fusion, when tumor cells were fused with normal cells, the subsequently…
A: Please post the 6th question separately it has the missing information for the options.
Q: In what mechanisms can genetic information be altered? What are the consequences of these changes?
A: Alteration or changes in genetic information is called mutation. Mutation can be spontaneous or it…
Q: 5. Consider the use of GWAS to identify mutations that contribute to an increased risk of pancreatic…
A: Cancer is a highly fatal disease that may occur due to the exposure towards high ultra violet rays.…
Q: 1. Stress can affect the epigenome of an individual. II. Depending on the affected site, epigenetic…
A: The phrase epigenome comes from the Greek word epi, which means "above" the genome. The epigenome is…
Q: 10. Draw a simple operon, including the operator, promoter, and the structural genes. Make sure to…
A: Operon system is seen in bacteria (prokaryotic cells). Operon consists of a promoter, operator, and…
Q: 5. Briefly describe the lac operon and how it controls the metabolism of lactose.
A: An operon is a group of genes that are expressed under the same regulatory sequences.
Q: 8. Why is it adaptive for a bacterium to not express the genes that encode for that lactose…
A: Bacteria are able to adapt to their environment by regulating the expression of genes that encode…
Q: 4. A mutant strain of E. coli produces B-galactosidase in the presence and the absence of lactose.…
A: An operon is defined as a set of structural genes regulated by a common promoter in bacteria.
Q: 1. Compare and contrast gene regulation of a Lac operon when there is little glucose in the…
A: The cellular environment has an impact on cellular action which is achieved by controlling the…
Q: 2. You are studying the regulation of the lactose operon in Escherichia coli, by measuring…
A: The lac operon is responsible for the entry and metabolism of lactose in E. coli as well as most…
Q: 2. What is attenuation and what is its significance in prokaryotic gene regulation? Explain…
A: Gene expression is defined as a process which is used by cells to convert the instructions coded in…
Q: An individual contracts an infection and this results in the production of soluble proteins that act…
A: Innate immunity is also known as non-specific immunity. We are born with this defense system, innate…
Q: 9. Explain how a small amount of growth factor can mediate an amplified signal inside the cytoplasm…
A: Signal transduction pathways translate signals received at the cell's surface into cellular…
Q: Describe the differences among embryonic, adult, and induced pluripotent stem cells.
A: Stem cells Stem cells are those cells that have the capacity of self renewal and differentiation.…
Q: 6. Which of the following is true about E. coll's lac operon? If there is no lactose present, the…
A: Option 1. For the lactose transport and metabolism of in E. coli and other bacteria, the lac operon…
Q: How does the HAEIII enzyme discriminate between the C-G polymorphism in the TAS2R38 gene?
A: HaeIII enzyme cuts at the GG:CC which is found at nucleotides 143-146 of the TAS2R38 gene. The…
Q: 6. How did the back mutation in hisG affect the protein produced by this gene?
A: Back Mutation:- Back mutation is defined as the type of mutation which causes reversal. It is a…
Q: I. Answer the following: 1. What are the main elements of the lac operon and their functions? 2.…
A: Definition:- An operon is a group of genes that are transcribed at the same time. These are a…
Q: 1. Stress can affect the epigenome of an individual. II. Depending on the affected site, epigenetic…
A: Stress can have a direct effect on DNA through the mechanism of epigenetics, which means 'on top of…
Q: The of satellite cells in the skeletal muscles can be found A. as a dispersed population of stem…
A: Myosatellite cells, often known as satellite cells or muscle stem cells, are small multipotent cells…
Q: 3. What is the during: (one word per answer) phosphorylation state of Rb a) late Go phase? b) early…
A: Introduction :- Retinoblastoma protein, often known as pRb or Rb, is a tumour suppressor protein…
Q: 2. Some mutant corn plants start seed germination while the kernels are still on the cob, a…
A: The offspring's continuous growth which is attached to the maternal parent in flowering plants…
Q: 1. Which of the following is true? A. Insulin was transformed to pancreatic cells B. Insulin is a…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: How might the regulation of the lac operon change if a point mutation occurred that blocks the…
A: Lac Operon consists of structural (z y and a) , regulatory (I), promoter and operator genes in the…
Q: (iii) What is the function of the promoter in the bacterial operon?
A: The lactose operon (also abbreviated as the lac operon) is a group of genes present in E. coli and…
Q: 7. If a researcher moves the promoter for the lac operon to the region between the beta…
A: Lac operon is a bacterial gene and it works through a repression mechanism. lac I produces repressor…
Q: why a mutant Ras is an oncogene causing many human cancers
A: Ras proteins are proto-oncogenes that are frequently mutated in human cancers.
Q: 1) Assume you have an operon that is repressible. In this case, the rate of synthesis of repressor…
A: An operon is defined as a DNA functioning unit containing a cluster or group of genes under the…
Q: 6. Suppose a particular gene is required for early development and also later for development of a…
A: Mosaic analysis with a repressible cell marker is a technique used to create homozygous mutant…
Q: 9. A single base substitution mutation in lacY gene of the Lac operon would render the entire lac…
A: Gene regulation at the level of transcription in bacteria is achieved by the operon model. Operon is…
Q: 5. In what mechanisms can genetic information be altered? What are the consequences of these…
A: Mutations are sudden heritable change in the DNA sequence that alters the amino acids and then the…
Q: 1. How do muscle cells remain differentiated as muscle cells?
A: Note: Please upload 2nd question separately. Answer:1. Introduction: Human embryonic stem cells are…
Q: 1. Define gene expression. 2. Why must gene expression be regulated?
A: Gene expression is basically the expression of phenotype in an organism, using the information of…
Q: 3 5. Suppose you perfe would you expect 6. If you did not get the operon was c
A: B -Galactosidase -- B - galactosidase belongs to class 3 ,hydrolases .B gal belongs to subclass of…
Q: Please tell me: What's a mutation in moleculer terms? 2. When a mutation deletes a base in genomic…
A: DNA DNA content specific sequence of nitrogenous base in their stand. If the sequence is changed…
Q: Why is folate recommended on pregnant women? Connect this to epigenetics.
A: Introduction Nutrients are important for overall growth and development of the organisms. These are…
Q: Compare and contrast repressible and inducible operons. 2. Are genes for enzymes involved in…
A: An operon is a group of genes coding for proteins that perform related functions, that are…
Q: What results from the spiral cleavage of mollusks?
A: Ans) Spiral holoblastic cleavage is characteristic of several animal groups, including annelid…
Q: 17. The following is a true statement regarding hydroquinone as depigmenting agents.... A. has a…
A: Skin lightening agents are chemicals that lighten skin color. Hydroquinone, kojic acid, mono benzyl…
Q: What are the effects of the following conditions on Lac operon of bacteria
A: Lac Operon is a set of three structural genes regulated by a common promoter and maintain lactose…
2. Define the term maternal effect genes, and explain why
the protein products of some of these genes are called
morphogens
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- Which of the following is not true of somatic cell gene therapy? a. White blood cells can be used. b. Somatic cells are cultured, and the desired DNA is introduced into them. c. Cells with the introduced DNA are returned to the body. d. The technique is still very experimental. e. The inserted genes are passed to the offspring.2. How would you expect the development of each of the following to occur in male rats were given an aromatase inhibitor for the first week after birth? (i.e. would each area be large or small for each?) a)SDN-POA b)AVPV c)SNB2. What does an operon typically consist of? a. an operator, a promoter, and a cluster of genes b. a cluster of genes c. a promoter and a cluster of genes d. an operator and a cluster of genes e. a promoter and an operator
- 1. Contrast positive versus negative regulation of gene expression. Describe the role of the repressor in an inducible system and in a repressible system.3. How might the regulation of the lac operon change if a point mutation occurred that blocks the ability of the repressor protein (LacI) to bind lactose?1. Why is folate recommended on pregnant women? Connect this to epigenetics.
- 1. a)how is it possible for such drugs to selectively kill bacterial cells and not our own cells? b)Provide an example of post-translational regulation of protein activity and explain the advantage of regulating each protein/process at the post-translational level instead of the transcriptional level.8. what is A mutant that prevents the production of the wild-type protein or renders it inactive. Usually a recessive mutation?7. Although DNA gets all the glory, it’s actually RNA that does most of the work when cells produce proteins. Explain how RNA is involved in gene expression (i.e., in transcription and translation).
- 2)You would expect liver cells and muscle cells to have the same gene expression. a)True b)False2) How does the HAEIII enzyme discriminate between the C-G polymorphism in the TAS2R38 gene?9. Explain how a small amount of growth factor can mediate an amplified signal inside the cytoplasm of the cell and lead to the activation of transcription factors in the nucleus
