ave to illustrate the ENU induced mutations that has a affecting developmental. I know it’s an example for developmental gene discovery and his role and uncovering the requirements for primary Cilia and the embryonic pattering.
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- All yhe cell in the human body has the same genome but have differences in their structure and function performed . what could be the reason ?I. The retinoic acid receptor (RAR) is a transcription factor that is similar to steroid hormone receptors. Thesubstance (ligand) that binds to this receptor is retinoicacid. One of the genes whose transcription is activatedby retinoic acid binding to the receptor is myoD. Thediagram that follows shows a schematic view of theRAR proteins produced by genes into which one oftwo different 12-base double-stranded oligonucleotides had been inserted in the ORF. The insertion site(a–m) associated with each mutant protein is indicatedwith the appropriate letter on the polypeptide map.For constructs encoding proteins a–e, oligonucleotide 1(5′ TTAATTAATTAA 3′ read off either strand) wasinserted into the RAR gene. For constructs encoding proteins f–m, oligonucleotide 2 (5′ CCGGCCGGCCGG 3′)was inserted into the gene.NH2 f g h i j k l m COOHa b c d eThe wild-type RAR protein can both bind DNA and activate transcription weakly in the absence of retinoic acid(RA) and strongly in RA’s presence. Each…I am confused about how stem cell transplants works. If you put a semi differentiated tadpole nucleus in a denucleated egg cell, it’ll develop into a fully formed tadpole, but if you put a fully differentiated tadpole nucleus, it won’t (because the genes have already been expressed in a way where the cytoplasmic determinants cannot operate to the fullest). Then how come in stem cell transplants, you use adult nucleuses that are already developed and transplant them into the denucleated egg cells?
- During very early human development, humans typically have skin or webbing between the fingers until they are around six weeks old. However, as growth and development occur, the webbing is broken down and dissolved away, leav- ing the spacing between each finger on its hand. Which of the following best describes this process of controlled cell in the web- bing of the fingers that occurs during human development? There is normally little to no webbing between your fingers. A B C apoptosis necrosis atrophy D inflammationlysome function in plants and animals''The cell cycle is the ticking clock that sets thetempo of developmental processes, with maturationalchanges in gene expression being dependent on cell-cycleprogression.'' Explain why or why not.
- The process of cell modification from a generalized cell to one that performs a specific task is known as recombinant DNA O gene expression O cell differentiation gene development(46) A mutated form of protein p5x is found in patients with squamous cell carcinoma. In vitro studies show that the normal p5x molecule binds to DNA, and neoplastic cells accumulate in the G0 phase of the cell cycle. In contrast, the mutated form of p5x does not bin d to DNA. These finding are most characteristics of which of the following? (A) Growht factor receptors (B) GTP-binding protein (C) Nonreceptor tyrosine kinases (D) Oncogene proteins (E) Tumor suppressor gene proteins1. (a) Describe the generalized model of the cell cycle. Demonstrate how cyclins and cyclin-dependent kinases can regulate the cell cycle. (b). Describe three ways in which cells lose their ability to regulate their growth to become cancerous.
- Biologists have long been interested in the effects of radiation on cells. In one experiment, researchers examined the effect of radium on mitosis of chick embryo cells growing in culture. A population of experimental cells was examined under the microscope for the number of cells in telophase (as a measure of mitosis occurring) before, during, and after exposure to radium. The results are shown in the Figure. What is the effect of radium exposure on mitosis? Source: R. G. Canti and M. Donaldson. 1926. The effect of radium on mitosis in vitro. Proceedings of the Royal Society of London, Series B, Containing Papers of a Biological Character 100:413419.https://nj.pbslearningmedia.org/resource/nsn08.sci.life.stru.stemcell2/stem-cells-breakthrough/ Describe the 4 different types of stem cells. (Totipotent, pluripotent, multipotent, IPS)Cell division cycle mutations render the mutants unable to continue the cell cycle. This phenotype creates a paradox where mutant cells must also be grown in the lab to further identify the gene and study the role of the protein. How do you think this problem can be solved?