Biology question and answers for November 15, 2023
- Q 7. A scientist wants to study the kinetics of a specific membrane protein. They ligate the DNAcoding region of the protein to the DNA coding region for GFP and introduce...
- Q Protein X is a transcriptional repressor. If the DNA binding domain for ProteinX was replaced with a different DNA binding domain, what would most likelyoccur?The new protein would cause transcriptional...
- Q Which of the following would cause Drosophila cells to behave as they wouldat night?A chemical that increases the polyubiquitination of Tim.A chemical that decreases the expression of Tim.A chemical that...
- Q A scientist studying NTF2 starts to consistently add excess miRNA targeting NTF2 mRNA into a eukaryotic cell. What will eventually occur?Nuclear import will decrease, and nuclear export will decrease.Nuclear import...
- Q In "the repressillator" (also known as "the represilator"), gene A is the Lac repressor. What should occur if cells containing the repressillator were continually maintained in very high (and excess)...
- Q A proteasome inhibitor will...decrease the number of multiubiquitylated proteins.decrease the number of polyubiquitylated proteins.increase the number of multiubiquitylated proteins.increase the number of polyubiquitylated proteins.
- Q -hort tandem repeats are inherited from parents. The mother has 8 repeats of the TPOX STR onone chromosome and 6 repeats of the TPOX STR on the other chromosome (alleles...
- Q Why does adding SDS and potassium acetate, followed by centrifugation precipitate the proteins and chromosomal DNA out of solution? Why does the RNA not precipitate out? This is for an...
- Q Dr. Stevens is examining the DNA sequences of a group of mice. He notices that in one of the mice, one nucleotide pair is substituted with another in the part...
- Q Chargaff's rule explains how the nitrogenous bases in DNA pair in complementary patterns. Adenine always pairs with thymine, and guanine always pairs with cytosine in order to maintain the same...
- Q Which technique would be MOST useful in determining the father of a child in a paternity suit?A. DNA FingerprintingB. Polymerase chain reactionC. Computer generated parental punnett squareD. Karyotype of father...
- Q During the process of replication, a molecule of DNA unzips, forming two single strands. What makes up each individual strand of DNA?A. nitrogenous bases attached to a sugar-phosphate backboneB. paired...
- Q The diagram below illustrates a process that can occur during cell division and results in an alteration in the composition of a chromosome. Each letter in the diagram represents a...
- Q Which option below illustrates the DNA "Base Pairing Rule"?G-C and A-TJack and JillG-C and A-U
- Q (8.3) Thirty-three percent of sea urchin DNA is composed of the nitrogenous base adenine (A). According to Erwin Chargaff, whatpercent of the DNA is composed of guanine (G)?a 17%b 66%c...
- Q In a DNA double helix, a region along one strand of DNA has the following sequence:5'- GCCTAATC-3'What is the complementary sequence?A. 3'-GCCTAATC-5'B. 5'-CGGAUUAG-3'C. 5'-CGGATTAG-3'D. 3'-CGGATTAG-5'
- Q If double stranded DNA has 14% G (guanine), what percent A (adenine), T (thymine) and C (cytosine) would you expect?A. A = 14%, T = 36 % and C=36%B. C=14%,...
- Q Which of the following statements explains the relationship that is most similar to the relationship between genes and chromosomes? Directions for building a structureStairs going to the second floorSails that...
- Q (8.2) Watson and Crick published a paper that shows DNA was a double helix made of complementary strands. Which means that if one strand is CTATGT, the otherstrand would bea...
- Q Select all of the following genotypes that is/are homozygous?A ZZB ZZc AaD AAE aaF ZZ
- Q Q2A: Knowing how the ara operon is being regulated when only Arabinose is present, which ofthe following conclusions can you make based on your results? Select all that apply (2...
- Q Zoe is a healthy young woman who is researching her ancestry. She sent a DNA sample to a company to have her genes analyzed. The results showthat a large percentage...
- Q Due to gene interactions, pigment in mouse fur is only produced when the W allele is present. Individuals of the ww genotypeare white. If color is present, it may be...
- Q You want to search for latent prints on a styrofoam cup. What type of fingerprint processing will you use? *NinhydrinSuper glue / CyanoacrylateAmido BlackBlack or Magnetic Fingerprint Powder
- Q Helicases are proteins that "unzip" double stranded DNA to produce two, unbound single-strands of DNA. Some helicases initially bind to double-stranded DNA, while other helicases initially bind to single-stranded DNA...
- Q Why is cancer growth dependent on an increased number of blood vessels?a) All options are correctb) To shield the tumor from immune cellsc) To increase the tumor's stabilityd) To supply...
- Q Vocab: match the definition or description to the correct pattern of genetics.Column A.Show changes in chromosomes such asDown syndromeHuman skin color and eye colorboth traits are fully and separatelyexpressedBlending the...
- Q Which technique would you use to separate proteins by charge?a) Size exclusion chromatographyb) PCRc) Sonicationd) lon exchange chromatography
- Q What does it usually mean when an actin filament has an ATP cap?The actin filament has actin covalently bound to ATP via a phosphodiester bond atthe plus end.The actin filament...
- Q Recombination within which type of inversion heterozygote results in a dicentricchromosome? Why does a dicentric chromosome not form in the other type of inversionheterozygote. You must explain in enough detail...
- Q Which statement below about nucleotides is TRUE?Base pairing occurs between the 5' and 3' carbons of the sugar in a nucleotide.A deoxynucleotide triphosphate (dNTP) consists of three DNA nucleotides attached...
- Q You are in the lab and you are working with a single neuron (Good job, you neuroscientist!). You expose the dendrites to some neurotransmitters and detect some depolarization in the...
- Q Which of the following statements iscorrect for a transmembrane proteinbeing translated by an ER-boundribosome?There must be a nuclear localizationsignal.There must be multiple start-transfersequences.There must be an N-terminal signalsequence.There must be...
- Q The Repressor protein...A. attaches to the operator region and blocks GFP gene transcriptionB. is inactivated by the sugar arabinoseC. is activated by the sugar arabinoseD. attaches to the promoter of...
- Q Which of the following is known as the "translator molecule"?ribosomemRNAamino acidtRNADNA
- Q Match the statements in the left with the type of gene transfer in the right.Gene transfer between cells of different generationGene transfer as a plasmid between two Gram-negative bacteria connected...
- Q Recombinant E. coli that contain the plasmid PGLO will only glow in a medium containing...ampicillinrepressorGFP genearabinoseall of the above
- Q Which of the following statements is FALSE?a. A prophage is phage DNA inserted into a bacterial chromosome.b. A prophage can "pop" out of the chromosome.c. A prophage may result in...
- Q Which one of these statements is correct? Read VERY carefullyA. During transcription, all the DNA molecule is transcribed to one mRNAB. Ribosomes start translation at the AUG codon in the...
- Q A frame-shift mutation can generate:A. A non-functional proteinB. A longer mutated proteinC. A shorter proteinD. A mutated protein with a different 3D shapeE. All of the aboveI select this option...
- Q If a mutation happens in the DNA that changes the T at base 10 to a C:a) What would be the mutated sequence of nucleotides in the corresponding codon in...
- Q What is/are required for the RNA poltmerase to be able to transcribe the 3 inducible enzymes in the Lac Operon?A. Lactose should be presentB. Glucose should be absentC. Glucose should...
- Q While in the Inducible Operon the repressor is synthesized already in active form (i.e. ready to bind to the operator), in the Repressible Operon the repressor is synthesized in an...
- Q Transcription starts at any site on a DNA molecule True False
- Q 4. Why the mechanism of DNA synthesis is different between the two strands of DNA?A Because the genetic code is degenerateB. Because the strands of DNA are antiparallelC. Because the...
- Q The anticodon is the 3 nucleotides in the tRNA that bind to the codon (3 nucleotides) in the mRNATrueFalse
- Q A mutation is a permanent change in the nucleotide sequence of RNAO TrueO False
- Q Translation ends when ribosomes "read" any of the three nonsense codons on the sequence of the tRNA that is being translatedTrueFalse
- Q In bacteria, certain mutations result in resistance to antibioticsO TrueO False
- Q There has been an explosion of interest in small noncoding RNAs in plant, animal, and other genomes. Why were these small RNAs not identified and studied in earlier decades?
- Q Robertsonian translocations occur between__ chromosomes:a. Telocentricb. Submetacentricc. Metacentricd. None of the given choices
- Q Is its inheritance sex-linked or autosomal?The inheritance of the disorder is sex-linked because it is encoded by Y-linked genes.The inheritance of the disorder is sex-linked because it is seen only...
- Q A plant X is grown under certain conditions and the seeds have been supplied. How would one check for its totipotent character? Critically discuss each step and include diagrams, wherever...
- Q Did purified rCptA show the same major band as CptA?No, rCptA is bigger.Yes, the size of the major band was unaffected.No, rCptA is smaller.
- Q What allows Bacterial ribosomes to use the correct start codon?O a. Introns O b. Shine-Delgarno sequence O c. ORFs O d. Codon Bias
- Q What microbes have coupled transcription and translation?O a. Prokaryotes O b. All microbes Oc. Eukaryotes O d. Halophiles
- Q Name two of the four mechanisms of resistance that antibiotic resistant bacteria can develop to fight antibiotics. Briefly describe how they work. According to Michael Schmidt's TED talk, of the...
- Q A. Which two of the three modes of RNA processing are necessary to increase mRNA stability?B. Compare and contrast the ways in which each type of RNA processing you listed...
- Q Which of the following best describes a prion? O a type of protein that can misfold, and once misfolded can cause identical proteins to also misfold to generate long protein...
- Q Which set of jobs would be found in the field of disease evolution?A. genetic engineering, microbiologist, and biomanufacturerB. infectious disease specialist and virologistC. zoologist, marine biologist, and animal biologistD. biochemist...
- Q Cystic fibrosis is autosomal recessive. This means thatO carrier mothers pass the mutation to some of their sons, but not to their daughters.O both sexes are affected because new mutations...
- Q Which of the following reasons below are disadvantages of sexual reproduction?Recombination & independent assortment produce gametes with unique sets ofalleles.There is an increase in genetic diversity among the populations.There is...
- Q One way that single-gene diseases differ from other diseases is thatthey affect consecutive generations.they occur at the same frequency in every population.they are not treatable.it is possible to predict occurrence...
- Q When Mendel crossed pure breeding peas having yellow seed color (YY) with purebreeding peas having green seed color (yy), all of the offspring had yellow seed color.These results mean that...
- Q A male mouse with genotype a/a; B/b: C/c: D/d; E/e was crossed to a female mouse with genotype A/a; B/B; C/c: D/d; e/e. What proportion of the progeny will be...
- Q Positive transcription factor (PTR) is important because it turns genes on to prepare them to be read. What is more important (i.e., which has a greater impact if it is...
- Q The reasons that genetic diseases resulted from mitochondrial DNA mutation are only inherited from mother are:1.Mitochondrial DNA is inherited from mother alone2. Mitochondrial DNA from father remains the same over...
- Q A group of mutations, known as MT-ND1, have been identified in mitochondrial DNA. These mutations are associated with a number of debilitating diseases stemming from the production of nonfunctional proteins...
- Q A forensic scientist is trying to find out the number of adenine bases in the DNA sample that he obtained from a crime scene.What can he assume about the number...
- Q The base composition of DNA varies from one species to another. Which of the following ratios would you expect to remain constant in the DNA? (A) Cytosine: Adenine(B) Pyrimidine: Purine(C)...
- Q If 2N = 40 in a diploid cell, then that cell would contain:10 identical types of chromosomes10 different types of chromosomes5 different types of chromosomes20 different types of chromosomes20 identical...
- Q If a cell is 2N = 20, then what is the TOTAL number of chromosomes in this cell (at G1)?10 total chromosomes20 total chromosomes15 total chromosomes40 total chromosomes5 total chromosomes
- Q The type of chromosome abnormality that yields a long chromosome consisting of most of two acrocentric chromosomes is a(n)Robertsonian translocation.pericentric inversion.paracentric inversion.reciprocal translocation.
- Q When DNA is extracted from E. coli cells and analyzed for base composition, it is found that 42% of the bases are cytosine. That means that there is also 42%...
- Q If the SI gene has a mutation that changes its DNA's base pairs; how might this affect the individual?Why might research on genetic diseases focus on locating the genes that...
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