Biology question and answers for July 25, 2023
- Q A. \"Clonal selection\" applies to which type of leukocytes? B. Inwhich part of the body do the earliest stages of lymphocytedevelopment occur? C. What event \"triggers\" the development of thecell...
- Q I am interested in antibiotic resistance. How might I identifyall genes that contribute to resistance to a given antibiotic in aparticular isolate of bacteria all at once, using an approach...
- Q 5. The bacterium Salmonella typhimurium is a facultative aerobe.a. Explain what this means in terms of its growth requirements. b.If you could mutate just one gene in the genome to...
- Q When animals synthesize Met, they typically use Asp as thestarting point. Since they cannot incorporate inorganic sulfur,they use Cys as the source of sulfur, going by way ofcystathionine. Finally, they...
- Q Creating a transgenic organismA. is the result of deleting DNA from specific genes of anorganism.B. is a form of natural selection.C. is the result of adding DNA to an organism...
- Q (30) The textbook discusses human blood typing (ABO) from bothphenotypic and genotypic perspectives. If a particular red bloodcell exhibits both the cell surface antigens designatedglycoproteins A and B, we designated...
- Q Approximately 25% of human tumors are found to have activatingmutations in Ras. How do these mutations contribute to the tumordevelopment?
- Q Explain how a pathogen can escape your innate immunedefenses.
- Q Of 31 children born of father-daughter matings, 6 died ininfancy, 12 were abnormal and died in childhood, and 13 werenormal. From this information calculate roughly how many recessivelethal genes we...
- Q 1. Describe the mechanism of DCFDA and, what is the purpose ofrunning assay2 How will we evaluate the cytotoxicity of the 3 compounds weare working with?Must describe the mechanism of...
- Q In ecology, a population is best defined as:A. all members of any one species living in the same place atthe same time.B. all members of all species living in the...
- Q All of the following are true of receptor kinases except:a.Are found on the plasma membrane.b.Are ion channels.c.Dimerize when binding to their signaling molecule.d.Are transmembrane proteins.e.Contain a protein kinase domain.2. During...
- Q Two different genes controlling pod morphology in peas are foundon chromosome 5. The narrow pod trait is recessive to wide pods andyellow pods is recessive to green pods. A heterozygous...
- Q Your human body has two chemical messenger systems:Neurotransmitters and Hormones. 1) Where does each system primarilyoperate? 2) Which system is slower? 3) Briefly describe how the HPAaxis uses three main...
- Q Explain the mechanism by which a missense mutation in the RASgene that impairs the GTPase activity of the RAS protein promotescancer cell division.
- Q Some bacteria produce multiple toxins that interfere with thehost’s immune response. For example, one bacterial toxin is aprotease that cleaves the proteins that form tight junctionsbetween skin cells. The result...
- Q 8. Explain how the lacZ gene will be expressed when bacteriawith loss-of-function mutations in the lacI gene are in anenvironment free of both lactose and glucose.
- Q 2. At what point do the carbon atoms of each of the followingamino acids enter metabolic pathways for the production of energy?State citric acid cycle, etc.a. valine b. prolinec. glycine
- Q Explain the mechanism by which the signaling by the Epinephrinereceptor is amplified inside the cell. And also explain the meritof signal amplification.
- Q One page ( on Word, 400 words) summary of the Nobel Prize inPhysiology or Medicine at 2012Please dont send in a hand-written picture.. they are hard toread.
- Q Describe how genes are expressed into proteins by the cell
- Q Hypothesis 1: Mercury in thimerosal caused neurological damagein children, and is at least partly responsible forthe increase in autism diagnoses.Hypothesis 2: The rate of autism incidence is not increasing, onlythe...
- Q . Explain the mechanism by which the signaling by theEpinephrine receptor is amplified inside the cell. And also explainthe merit of signal amplification.
- Q Short Discussion – 1 paragraphWhat makes DNA and RNA good templates? What makes proteins poortemplates?
- Q Antibiotics are used to eliminate which organisms.A.VirusesB.BacteriaC.Protozoan pathogensD.All of the above.
- Q 1-Explane theseprocess and the role of bacteria:- Ammonification- Nitrification- Denitrification,2- Identify threebeneficial results of symbiotic nitrogen fixation3- Outline the sulfurcycle, and explain the roles of microorganisms in this cycle
- Q In your own words, describe the four types of induciblerepression. Explain how they cause repression (4 pts each).Identify whether they are cis acting or trans acting (1 pteach).
- Q What three forms of RNA are found in both prokaryotes andeukaryotes? Why are these three common to all organisms (describetheir cellular functions)?
- Q a) Explain the difference between \"non-native species\"and \"invasive species\".b) Provide three examples of invasive plants inCalifornia, provide a brief explanation for your examples includingwhere they are from originally, how they...
- Q moving our work from a hazardous to a safer envirment would be anexample of utilizing ?
- Q Microbiology!1. If allolactose is not present, the lac repressor will staybound to the operator, and the lac operon will not be transcribed.TRUE OR FALSE2. The transfer of a plasmid from...
- Q Health management and disease control is important in any industry.This is especially true when raising swine. What types ofbiosecurity protocols might you find if you were to visit a swinefarm?...
- Q 1. What are the main differences between the subject areas inhuman biology, human evolution, and human ecology? What are the Keysimilarities?2. From studying nonindustrial societies, what can we learnabout enviormental...
- Q Question: The alien species has decided that they want to use aray gun on you that will duplicate or remove one of the 23 types ofchromosomes in all of your...
- Q 1. Describe the various ways extinction rates aremeasured, in other words how do we estimate the loss ofbiodiversity on our planet.2. What are the principal threats to biodiversity?Describe the decline...
- Q Compare and contrast the processes of mitosis and meiosis.Describe the overall processes (not each detail) and explain whyeach is important. Be sure to include what type of cell (diploid ofhaploid)...
- Q When a stem cell undergoes asymmetric cell division, what arethe two cell types typically formed?List three ways stem cells protect their genomic DNA.What are the two main lineages derived from...
- Q The genetic term “loss of function†is used to describe anymutation in the DNA that leads to a particular protein that cannotfunction. There are many reasons why a protein may...
- Q A group of cells is assayed for DNAcontent and is found to have an average of 8 picograms of DNA pernucleus. Picograms are a relatively small unit of weight. Youstimulate...
- Q Explain and give an example of what an allele is, how allelesare related to an individual's genotype and phenotype, and howalleles are related to genes, DNA, and chromosomes. Please includein...
- Q 1. Imagine that a lion pride includes 10 females. A male working alonehas a 20% chance of defending a pride for a year, an act that willensure that he produces...
- Q 2. Describe the structure of a typical amino acid and explainhow they chemically combine to make a protein3. Describe the process of catabolic repression by glucoseconcentration, as seen in the...
- Q Which of the following statement(s) about p53 are true?p53 controls both the G2/M and the G1 cell cyclecheckpointsThe p53 tumor suppressor protein plays a key role in theregulation of the...
- Q Succession/resilience/fire ecology: Should ecosystems that arehighly resistant to disturbance also be highly resilient, or, wouldthey be inversely related where resistant ecosystems would have lowresilience (and vice versa)?   There is no knownconsistent...
- Q What is the direct cause of ovulation?
- Q Explain the primary differences between sea urchin andfrog development during the processes of fertilization, cleavage,and gastrulation. In your answer, provide a basic description ofeach process, describe the developmental stage that...
- Q Draw the lac operon promoter region with all its regulators (andpolymerase if appropriate) in the PRESENCE OF LACTOSE and theABSENCE OF GLUCOSE in the growth media in bacteria with a...
- Q My assignment is to write an essay no more than 4 pages on thistopic. I've already done about half a page but my prof doesn't havethe best notes and I'm...
- Q what is the connection between B-oxidation and the ureacycle?
- Q QUESTION 6Helicobacter pylori causes:Toxic shock syndrome.Stomach ulcers.Stomach cancers.Both b and c.7. Which Escherichia coli strain causes gastroenteritis?EPEC.ETEC.EIEC.All of the above.8. A subunit vaccine contains:The protein.The nucleic acid.The entire virus.Both a...
- Q Entropy isA. orderB. complexityC. disorderD. Both order and disorder are correctE. Both complexity and disorder are correHow can small molecules make their way past the cellmembrane?A. they pass through transmembrane...
- Q How the following processes each contribute to animaldevelopment: regional specification, cell differentiation,morphogenesis, growth, and developmental time (also known astemporal control). Use citations from peer-reviewed scientificjournal articles or the textbook to...
- Q (17) Differences in phenotype are called variations. Which ofthe following types of variations occur?(A) harmful (B) neutral(C) helpful (D) all of the above(24) An Organism's Phenotype refers to its:(A) genetic...
- Q What is a plant? Provide a thorough answer that clearly definesplants and highlights their synapomorphies. Define key terms inyour own words. In your answer, also distinguish plants from theirclosest living...
- Q Describe how tree rings form and how they can be used to addressscientific questions. In your answer, be sure to address both partsof this question (how they form, how we...
- Q The most common methods of microbial control might be handwashing and cooking of food.a. Explain, in detail, how soap and water disrupt a membrane atthe molecular level.b. Explain how heat...
- Q Apopulation of ants has a body color that is either red or black.The color is a result of one gene, with two alleles: The \"B\" allele(dominant) produces the black color,...
- Q Describe the features of AP-1 members that make them uniqueamongst transcriptional activatorsDescribe how the activation of Gs protein receptors, tyrosinekinase receptors and ligand-gated calcium ion channels can lead tochanges in...
- Q 8. Which of the following describes the initiation of bacterialtranscriptionA. The small ribosomal subunit binds to the Shine-DalgarnosequenceB. The sigma factor binds at the -10 locationC. Transcription begins at the...
- Q How are pressure and volume related?
- Q 10. Which of the following would be the most detrimentalmutation?A. AGCTCTGAT -> ACCTCTGATB. AGCTCTGAT -> AGCTCTGATGATC. AGCTCTGAT -> ACCTCTGAAD. AGCTCTGAT -> AGCTCGAT
- Q 4. Numerous lines of evidence suggest that mitochondrialbioenergetics and signaling are required for tumorigenesis.Does targeting mitochondrial metabolism represent a viabletherapeutic strategy?Discuss the evidence both for and against targetingmitochondrial metabolism for...
- Q Dichotomous key for common skinbacteria:I. Cells arranged in tetrads, glucose not fermented(Micrococcus)A. Colonies have yellow pigment M. luteusB. Colonies have red or pink pigment M. roseusII. Cells arranged in clusters,...
- Q Determine the correct answer and explain why it iscorrect. Identify why the other options are notcorrect.One of the major roles of the TCA cycle is to generatereduced cofactors for ATP...
- Q 10. Describe the following trends in flower evolution: petalpigmentation, organ fusion, bilateral symmetry, inflorescences.
- Q Metabolism is essential to life and is the process bywhich cells make energy to carry out all of the processes requiredfor them to survive. Metabolism requires that the organismtransport substances...
- Q Why do organisms have hemoglobin & how is the Antarctic fishis able to survive without it?
- Q 6. Which colony of bacteria will reach have the most cells after24 hours of growth?A. A colony that Starts with 50 cells and has a doubling time of120 minutesB. A...
- Q Is the lac operon a repressible or an inducible operon? Whathappens in the absence of lactose? What happens in the presence oflactose? Is the trp operon a repressible or an...
- Q Select one of the United Nations' (U.N.) MillennialDevelopment Goals (MDGs). Visit the website and report on the UN'sprogress in achieving this goal? How will meeting this goalpositively impact the health...
- Q An individual has the chromosomes below where the dot representsthe centromere: NOP.QRSTU NRQ.POSTU If a crossover event occursbetween the O and P loci, what is the shortest chromosome formed?Enter your...
- Q A researcher is interested in isolating an auxotrophic mutant inthe laboratory that is unable to synthesize the amino acidhistadine. Explain how this researcher would have to use negativeselection to isolate...
- Q 1. what evolutionary advances do Cnidaria have over thesponges?2. How easily can you distinguish between polyps and medusae? insolitary animals? in colonial animals?3. what type of symmetry is evident? Do...
- Q Compare and contrast neurotransmitter receptor-mediated effectson gene transcription with steroid receptor-mediated effects ongene transcription
- Q Why are mycobacteria (Mycobacterium)harder to controlthan other bacteria?What makes an enzyme specific(what causes an enzyme tobe specific)?
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