Which of the following statements is false when comparing prokaryotes with eukaryotes?a.The prokaryotic chromosome is circular, whereas eukaryotic chromosomes are linearb.Prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have manyc.The rate of elongation during DNA replication is higher in prokaryotes than in eukaryotesd.Prokaryotes produce Okazaki fragments during DNA replication, but eukaryotes do note.Eukaryotes have telomeres, and prokaryotes do notIn an analysis of the nucleotide composition of DNA, which of the following is true?a.A = C d.G + A = T + Cb.A = G and C = T e.both C and Dc.A + C = G + TWhich of the following is least related to the others on the list?a.Okazaki fragments d.DNA polymeraseb.replication fork e.semiconservative modelc.telomerasethe ABO blood group system A. incomplete dominance B. multiple alleles C. pleiotropy D. epistasisUsing RNA as a template for protein synthesis instead of translating proteins directly from the DNA is advantageous for the cell becausea.RNA is much more stable than DNAb.RNA acts as an expendable copy of the genetic material, allowing the DNA to serve as a permanent, pristine repository of the genetic materialc.many mRNA molecules can be transcribed from a single gene, increasing the potential rate of gene expressiond.B and C onlye.A, B, and CYou briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). These two classes of DNA probably representa.leading strands and Okazaki fragmentsb.lagging strands and Okazaki fragmentsc.Okazaki fragments and RNA primersd.leading strands and RNA primerse.RNA primers and mitochondrial DNAThe strands that make up DNA are antiparallel. This means thata.the twisting nature of DNA creates nonparallel strandsb.the 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strandc.base pairings create unequal spacing between the two DNA strandsd.one strand is positively charged and the other is negatively chargede.one strand contains only purines and the other contains only pyrimidinesSuppose one were provided with an actively dividing culture of E. coli bacteria to which radioactive thymine had been added. What would happen if a cell replicated once in the presence of this radioactive base?a.One of the daughter cells, but not the other, would have radioactive DNAb.Neither of the two daughter cells would be radioactivec.All four bases of the DNA would be radioactived.Radioactive thymine would pair with nonradioactive guaninee.DNA in both daughter cells would be radioactiveFor a couple of decades, biologists knew the nucleus contained DNA and proteins. The prevailing opinion was that the genetic material was proteins, and not DNA. The reason for this belief was that proteins are more complex than DNA. This is becausea.proteins have a greater variety of three-dimensional forms than does DNAb.proteins have two different levels of structural organization; DNA has fourc.proteins are made of 20 amino acids and DNA is made of four nucleotidesd.Only A and C are correcte.A, B, and C are correctWhat determines the nucleotide sequence of the newly synthesized strand during DNA replication?a.the particular DNA polymerase catalyzing the reactionb.the relative amounts of the four nucleoside triphosphates in the cellc.the nucleotide sequence of the template strandd.the primase used in the reactione.both A and DIt became apparent to Watson and Crick after completion of their model that the DNA molecule could carry a vast amount of hereditary information in which of the following? A) sequence of bases B) phosphate-sugar backbones C) complementary pairing of bases D) side groups of nitrogenous bases E) different five-carbon sugarsWhich enzyme catalyzes the elongation of a DNA strand in the 5' à 3' direction?a.primase d.topoisomeraseb.DNA ligase e.helicasec.DNA polymeraseCytosine makes up 38% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine? A) 12 B) 24 C) 31 D) 38 E) It cannot be determined from the information provided.Which of the following represents a similarity between RNA and DNA?a.Both are double-strandedb.the presence of uracilc.the presence of an OH group on the 2' carbon of the sugard.nucleotides consisting of a phosphate, sugar, and nitrogenous basee.Both are found exclusively in the nucleusA woman who has blood type A, has a daughter who is type O positive and a son who is type B negative. Rh positive is a simple dominant trait over Rh negative.. Which of the following is a possible phenotype for the father?a.A d.ABb.O e.IMPOSSIBLE TO DETERMINEc.Bthe ability of a single gene to have multiple phenotypic effect A. incomplete dominance B. multiple alleles C. pleiotropy D. epistasisthe phenotype of the heterozygote differs from the phenotypes of both homozygotes A. incomplete dominance B. multiple alleles C. pleiotropy D. epistasisFeather color in budgies is determined by two different genes Y and B. YYBB, YyBB, or YYBb is green; yyBB or yyBb is blue; YYbb or Yybb is yellow; and yybb is white. 19. A blue budgie is crossed with a white budgie. Which of the following results is not possible?a.green offspring d.A and Bb.yellow offspring e.A, B, and Cc.blue offspringGene S controls the sharpness of spines in a type of cactus. Cactuses with the dominant allele, S, have sharp spines, whereas homozygous recessive ss cactuses have dull spines. At the same time, a second gene, N, determines whether cactuses have spines. Homozygous recessive nn cactuses have no spines at all17. A cross between a true-breeding sharp-spined cactus and a spineless cactus would produce a.all sharp-spined progenyb.50% sharp-spined, 50% dull-spined progenyc.25% sharp-spined, 50% dull-spined, 25% spineless progenyd.all spineless progenye.It is impossible to determine the phenotypes of the progenyWhat is the ultimate source of all diversity? A) natural selection B) sexual recombination C) meiosis D) mutation
Explore Features
Discover the full suite of AI-powered study tools.
Study Plan
Build a personalized study schedule powered by AI.
Record Lecture
Capture and generate enhanced notes from your lectures.
Notes
Automatically generate comprehensive notes from any course material.
Calendar
Plan personalized study sessions with AI-assisted scheduling
Tutor Me
Get comprehensive step-by-step explanations on any topic.
Spark.E Call
Have a live voice conversation with your AI tutor.
Spark.E Visuals
Analyze diagrams, charts, and images with AI-powered explanations.
Audio Recap
Generate podcast-style audio summaries of your study materials.
Explainer Video
Turn any topic into an AI-generated educational video.
Flashcards
Create smart flashcard decks from your study materials with one click.
QuizFetch
Auto-generated quizzes from your uploaded content.
Arcade
Learn through interactive study games.
Exam-Specific Questions
Practice with real exam formats and questions.
Practice Tests
Simulate full-length exams from your material.
Essay Grader
Receive personalized feedback and grading on your essays.
Plugins
Shape the way Spark.E teaches you.
Mini Apps
Explore interactive study apps or build your own.