Molecular Basis of Inheritance Practice Test

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• What is an RNA primer?
• Which description best summarizes DNA replication?
• What is codon degeneracy and provide an example illustrating why some mutations are silent?
• Which statement about the initial nucleotide strand is true?
• Which statement describes repressible operon regulation?
• Which features make cloning vectors suitable for DNA cloning?
• How do DNA sequencing technologies differ in principle between Sanger sequencing and next-generation methods?
• What are the major DNA repair pathways and the types of damage they fix?
• What did earlier work on DNA demonstrate about its composition and base-pairing rules?
• Which molecule is transcribed from DNA?
• The RNA primer provides which chemical group for DNA polymerase to extend?
• Which statement best describes the flow of genetic information according to the central dogma?
• Meselson-Stahl experiment provided evidence for semi-conservative replication by density labeling. What was the core approach?
• What are transposons and how can they affect genome structure?
• What is the role of DNA ligase in replication?
• When was DNA discovered as a major chemical of the nucleus of the cell according to the material?
• Which statement best reflects Chargaff's rule?
• Which statement best describes the role of primase?
• What is the combined process that converts genetic information to a functional protein?
• In RNA, with which base does Adenine pair?
• During docking of tRNA to mRNA, which type of bond forms between the anticodon and codon?
• Which nucleotides are used to synthesize the primer?
• What is the significance of reverse transcription in the context of the central dogma?
• What is the central dogma of molecular biology?
• What is the start codon and its role?
• Single-strand binding proteins function by...
• How does DNA replication overcome supercoiling ahead of the replication fork?
• At the DNA replication fork, what occurs?
• Beadle & Tatum concluded that one gene carries the directions for making one protein, in which year was this conclusion proposed?
• What occurs during translation?
• There are three major types of RNA, each encoded by its own gene. Which types are they?
• A replication bubble is best described as...
• Which component is not typically involved in initiation of translation in a prokaryotic cell?
• How is the mRNA molecule formed?
• What is the main advantage of polyribosomes?
• Which RNA type is primarily involved in reading the codons of mRNA during translation?
• How is chromatin structure linked to gene regulation in eukaryotic cells?
• How many enzymes and other proteins participate in DNA replication?
• What function does RNA polymerase have, and where does it operate?
• Where does transcription occur in eukaryotic cells?
• What happens to the transcript RNA before it leaves the nucleus?
• Identify the two major forms of chromosomal mutation and provide an example of each.
• Which enzyme synthesizes RNA during transcription?
• What is the role of helicase at the replication fork?
• Distinguish between point mutations and frameshift mutations and their typical effects on protein products?
• Which component in a cloning vector is used to select for cells that carry the vector?
• Who discovered that individual traits are passed on from one generation to the next?
• Where are proteins synthesized in the cell?
• What is the result of alternative RNA processing?
• How many nucleotides constitute a codon in RNA?
• What did Hershey-Chase experiments show about the genetic material in viruses?
• What is alternative splicing and how does it affect proteome diversity?
• Which of the following is NOT a step of translation?
• Which describes codon degeneracy?
• Euchromatin vs heterochromatin - which statement is correct?
• Which statement about RNA primers is true?
• Why is the tryptophan operon described as repressible and how is it regulated?
• Which statement correctly characterizes cis-acting regulatory elements?
• Who made the X-ray diffraction patterns that Watson & Crick used?
• Which histone modification is commonly associated with active transcription?
• How do transcription termination mechanisms differ between bacteria and eukaryotes?
• Define transformation in the context of bacterial experiments.
• The typical length of an RNA primer is 5-10 nucleotides.
• How many chromosomes are present in a typical human somatic cell?
• Which RNA combines with ribosomal proteins to make up the actual ribosome?
• Which enzyme is responsible for sealing nicks in the sugar-phosphate backbone after RNA primers are removed during DNA replication?
• What was the key finding of the Hershey-Chase experiment and its significance?
• In the lac operon, how does the presence of lactose affect transcription?
• Which bases are purines?
• Which statement best describes the difference between a promoter and an enhancer in gene regulation?
• How do trans-acting and cis-acting elements differ in gene regulation?
• A coding sequence mutation that changes a codon to a stop codon is called what?
• What is the function of a multiple cloning site in a cloning vector?
• What is the editing activity of aminoacyl-tRNA synthetases?
• Which statement is true about RNA and genes?
• Regarding the 3' end of the RNA primer, which statement is true?
• Which sequences are retained in mature mRNA after splicing?
• Which model of DNA replication is accepted?
• Which statement best describes the central dogma?
• Attenuation is a transcriptional control mechanism that relies on leader peptide translation; what condition leads to termination?
• Which polymerase transcribes 5S rRNA and tRNA genes in eukaryotes?
• Which statement best describes the progression of replication from origins?
• Which base pairs with Adenine in DNA?
• Which statement about DNA replication is accurate?
• Which mutation type is most likely to produce a premature stop codon?
• Following the Chromosomal Theory of Inheritance, what are the two components of the chromosome?
• RNA primer is composed of which type of nucleotides?
• How does protein processing differ in prokaryotes and eukaryotes?
• How could DNA be an intelligent molecule capable of carrying hereditary information?
• How do mutations affect reading frames and potential protein function?
• In DNA, which base pairs with Adenine?
• DNA makes which types of RNA?
• Give an example of what happens if reading frames are altered.
• Which of the following is a difference between DNA and RNA?
• During bacterial DNA replication, which enzyme is primarily responsible for adding RNA primers required to start DNA synthesis?
• What are the major steps in post-transcriptional processing of eukaryotic mRNA?
• Which statement correctly describes the action of helicase?
• What makes up a nucleotide?
• Which option describes DNA as a double-stranded, helical nucleic acid molecule capable of replicating and determining the inherited structure of a cell's proteins?
• What marks the transition from primer to DNA synthesis?
• What is the process called when RNA is used to synthesize a protein?
• Which double-strand break repair pathway is generally more error-prone?
• Which sequences are removed during splicing?
• Which statement best defines a point mutation?
• What begins to happen on one of the unzipped strands?
• What statement about the two DNA strands is true according to the material?
• Which DNA repair pathway is used to remove bulky, helix-distorting lesions such as those caused by UV damage?
• What is the role of primase during DNA replication?
• Which nucleotide is used in RNA in place of thymine?
• In the early 1900s what molecule was considered to transmit hereditary information from one generation to the next?
• What is the role of DNA polymerase in replication?
• How does CRISPR-Cas9 achieve targeted genome editing?
• Which mechanism describes rho-independent termination of bacterial transcription?
• What is true about introns in genes?
• Give examples of mutagens and the types of DNA damage they cause?
• What forms the backbone of DNA?
• What genes comprise the lac operon and how is it regulated?
• During translation, the ribosome reads the code in which molecule?
• Which statement describes a common step in DNA repair processes?
• What are telomeres, and what is the function of telomerase?
• The distinctive 'X' pattern meant DNA had what structure?
• DNA polymerase extends from the primer's end. Which precise statement is correct?
• Which process moves genetic information from DNA to a messenger RNA?
• What does redundancy in the genetic code and wobble base pairing mean?
• In RNA, what base replaces thymine?
• Which statement best describes imprinting?
• Which statement correctly describes replication origins in eukaryotes?
• What is the process called when DNA is converted into RNA?
• Which enzyme attaches the correct amino acid to its tRNA?
• What is the process of translation best described as?
• From Avery's experiments, what was concluded about the genetic material, and in which era?
• Which scientists are associated with the Chromosomal Theory of Inheritance?
• During DNA replication, which base pairs form between the two strands?
• What is the role of the anticodon in tRNA?
• Which component is required to initiate DNA synthesis during PCR?
• In a eukaryotic cell, where is the DNA primarily located?
• Splicing of pre-mRNA is carried out by which complex?
• How many nucleotides comprise a codon in the genetic code?
• Topoisomerase primarily does what during replication?
• How do transcription factors influence promoter activity and gene expression integration with signaling pathways?
• Name the three types of RNA and their general roles in making protein.
• What is the purpose of transcription?
• Which statement about priming on the lagging strand is correct?
• DNA stores the instructions for building RNA.
• What is the primary purpose of Polymerase Chain Reaction (PCR) in molecular genetics?
• Which statement about DNA polymerase activity is true?
• Which statement accurately describes the relative throughput of Sanger sequencing and next-generation sequencing?
• What macromolecule results when tRNA delivers amino acids to the ribosome during translation?
• What is the significance of DNA strands being complementary for replication?
• Which sugar is found in DNA nucleotides?
• What happens to telomeres during successive cell divisions in somatic cells?
• Why must nucleotides be added in the 5' to 3' direction?
• Which enzyme unwinds the DNA during replication?
• What is the genetic code and why is it universal?
• Which process involves mismatch repair after DNA replication?
• What important tool did Linus Pauling use to determine the structure of proteins?
• In eukaryotes, which RNA polymerase is primarily responsible for transcribing mRNA?
• What is the main advantage of DNA being double-stranded?
• What have people wondered since the beginning of human history?
• What did Hershey and Chase demonstrate about the hereditary material in bacteriophages?
• List the highlights of the three stages of transcription.
• Define epigenetic inheritance and provide an example.
• Which general transcription factor is a key component of transcription initiation by RNA polymerase II in eukaryotes?
• According to Chargaff's rules, which statement is true about the base composition of DNA?
• In transcription, which DNA strand serves as the template for RNA synthesis?
• Which molecule carries the genetic message from the nucleus to the ribosome for protein synthesis?
• Describe the two main pathways for repairing double-strand breaks and their key differences.
• Explain the role of aminoacyl-tRNA synthetases in translation fidelity.
• Which protein is primarily responsible for stabilizing single-stranded DNA during replication?
• What type of molecule does tRNA transport to the mRNA?
• Who won the race to show the three-dimensional structure of DNA?
• What was the primary contribution of Maurice Wilkins and Rosalind Franklin to DNA research?
• What did Griffith, Avery, and others demonstrate with bacteria?
• Which statement best differentiates plasmids from chromosomes in terms of structure, replication, and gene content?
• What is recombination and how does it contribute to genetic diversity in meiosis and bacteria?
• Daughter DNA is described as...
• What happens at the ends of linear chromosomes during replication?
• What does semi-conservative replication predict about the composition of each daughter DNA molecule?
• What characterizes genetic imprinting?
• How does the tRNA anticodon interact with the mRNA codon during docking?
• Which description best characterizes the structure and strand orientation of DNA?
• Which base pairs with Cytosine?
• Which RNA forms the core of the ribosome and catalyzes peptide bond formation?
• Which enzyme starts an RNA chain from scratch?
• Which molecule delivers amino acids to the ribosome during protein synthesis?
• Explain the roles of ribosomal A, P, and E sites during translation.
• Replication proceeds in what manner from origins?
• Which statement describes DNA proofreading during repair?
• What is the basic unit that composes DNA?
• Which statement best describes promoter recognition in bacterial transcription initiation compared with eukaryotic initiation?
• Which regulatory element is a distal regulator that increases transcription by looping to promoters?
• How do enhancers and silencers influence transcription in eukaryotes?
• If there are 20 amino acids then what is the minimum number of tRNAs that must exist?
• Summarize Griffith's transformation experiment and its conclusion.
• Which chromosomal rearrangement can generate gene fusions by joining two genes from different chromosomes?
• Where in the cell does mRNA function during protein synthesis?
• What is epigenetics and how do DNA methylation and histone modifications influence gene expression?
• Where is RNA commonly found?
• What is the role of small nuclear ribonucleoproteins (snRNPs) in RNA splicing?
• Which enzyme elongates DNA in the 5' to 3' direction?
• Which mutation changes a codon to code for a different amino acid?
• Which components are involved in initiation of translation in a typical prokaryotic ribosome?
• Which bases are pyrimidines?
• Primase uses what as its template during primer synthesis?
• What do the -ase endings on certain molecules indicate in this context?
• Which molecule serves as the adaptor that carries amino acids to the ribosome?
• What did Avery, MacLeod, and McCarty demonstrate about the transforming principle?
• Daughter DNA molecules after replication contain...
• Why was protein considered a better candidate as the hereditary molecule than DNA?
• Transposable elements can affect gene expression by what mechanism?
• List several features about the genetic code.
• Which base pairs with Adenine?
• Which enzyme lays down the RNA primer during replication?
• DNA polymerases have which true property?
• Origins of replication are best described as...
• In a prokaryotic cell, where is DNA located?
• Which base is unique to RNA and not present in DNA?
• What is a telomere?
• Which RNA carries the instructions for how to make the protein encoded within its sequence?
• Which of the following is not a DNA nitrogenous base?
• What occurs during transcription?
• Which of the following is a purine?
• Where does translation take place in the cell?
• What was Chargaff's contribution to solving the DNA puzzle?
• What describes DNA orientation between its two strands?
• True or False: Primase can start an RNA primer from scratch.
• Transcribe the following DNA template into RNA: ATC GGA TAC. Which RNA sequence is produced?
• Which statement describes Chargaff's base-pairing rule?
• In eukaryotic chromosomes, how many origins of replication may exist on a chromosome?
• In DNA, hydrogen bonds form between which base pairs?
• What is a nonsense mutation?
• What is the advantage of the 5' cap and the poly A tail?
• How was X-ray diffraction used to help discover the shape of DNA?
• What is the role of microRNAs in post-transcriptional gene regulation?
• How does CRISPR interference (CRISPRi) differ from CRISPR knockout?
• Primers are described as which of the following in replication?
• Which RNA attaches to amino acids and then transfers them to the ribosome during translation?
• Which statement about plasmids and horizontal gene transfer is accurate?
• Which sequence correctly describes the flow of genetic information in cells?
• DNA's backbone is formed by which components?