Biology question and answers for July 05, 2023
- Q What are the similaritis and divergence between immunoglobulinand T-cell receptor (TCR) rearrangement? What are the genes and keyenzymes involved in this process?
- Q 5. Bill has come to you for genetic counseling. He is concernedthat he and his sister (Alice) are at risk for Huntington disease.Bill and Alice are too young to show...
- Q Imagine you have a plasmid and you cut it with three differentrestriction enzymes (enzymes 1, 2, 3). You then run these fragmentsthrough a gel and get this separation.Label the positive...
- Q whyobligate anerobe die in the prescence of oxygen
- Q Question 156Which of the following is not among the 4 most commonly mutatedgenes in pancreatic cancer?KRASp16 geneTGFb etaSMAD4Question 164Pancreatic Ductal Adenocarcinoma (PDAC) tumors typically arisefrom (choose all that apply):tumorigenic pancreatic...
- Q • Understand the possible outcomes of helminthinfections• Be able to compare different infections caused by differenthelminths• Know the differences between accidental, definitive andincidental hosts in helminth infections.In one page or...
- Q The current estimate is that mammalian b cells are capable ofproducing 1010 different immunoglobulins, each with a differenthypervariable region. Explain the immunological consequence of thisgeneration of diversity.
- Q What advantages and disadvantages would be important toconsider when choosing between each of the following types of modelorganisms for researching a given scientific question: prokaryote(like E. coli), unicellular eukaryote (like...
- Q Clearly explain all steps leading to angiosperm gameteproduction (males and females) and steps leading to embryoformation.
- Q No-till agriculture vs traditional tiled agriculture. What are thepros and cons? In what ways do they benefit and it what ways dothey not?
- Q 1. Discuss different models for DNA replication that wereconsidered by early researchers. Explain why the current model forDNA replication was accepted following experiments by Meselson andStahl. Describe this model in...
- Q compare and contrast proteinimport into the ER and into the nucleus. List at least two majordifferences in the mechanisms, and speculate why the ER mechanismmight not work for nuclear import...
- Q Early in the course we spent time talking about carbohydrates,proteins, nucleic acids and lipids. All of these are synthesizedthrough condensation reactions.A. What is a condensation reaction?B. Why do condensation reactions...
- Q Discuss the relationship of wetland protection/the Clean Water Actand habitat protection/ Endangered Species Act. Specificallyconsider the Edwards Aquifer of the San Antonio area, what would astrong ESA argument look like...
- Q explain the process of fertillization including embryo andendosperm formation?
- Q Your patient is suffering from upper abdominal pain withoccasional heartburn, indigestion, nausea, and gas discomfort. Yoususpect a stomach ulcer. Discuss the causative microbe for astomach ulcer being sure to include...
- Q You perform the following experiment: Xenopus embryos aretreated early in development (before gastrulation begins) withmorpholinos to reduce the activity of Cerberus. You take an explantfrom the dorsal blastopore lip from...
- Q In molecular biology, two identical molecules withdifferent linking number are said to be topoisomers. Describe how acircular DNA molecule can be converted from one topoisomer intoanother if there are no...
- Q As a researcher, you were asked to grow a cell in a mediumcontaining radioactive nucleotides, which then get incorporatedinto DNA. Upon later examination, the radioactivity appeared to beconcentrated in theA-nucleus.B-endoplasmic...
- Q How is it the case that many cancer-predisposing mutations donot immediately cause cancer?Describe a type of mutation in Ras protein that might raise thelikelihood of a persondeveloping cancer.
- Q While human impacts on the ecology of our planet have been hugeand often negative there are clear examples of where we havemitigated to a significant extent these negative impacts once...
- Q Eucalyptus trees are a dominant species in some forests. Thesetrees can be effected by a root rotting disease caused by a fungallike protist called Phytophthora. Where this disease is presentindividual...
- Q What is the Absorbance of a cell suspension? How does absorbanceat 400 nm change with the number of cells in a cell suspension?
- Q Describe the links between the cell cycle, it's controlmechanisms, mutations and the development of cancer.
- Q please do allis due in an hour, please all\"Survival of the fittest\" refers toa hierarchical series of changes in living organisms leading tothe best, most developed species on Earththe concept...
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