Overview of Central Dogma and Replication
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Questions
According to the central dogma of molecular genetics, what is the process by which a molecule of RNA is constructed to be complementary to a parent DNA strand?
View answer and explanationWhat does the term 'semi-conservative' signify in the context of DNA replication?
View answer and explanationWhich enzyme is responsible for recognizing the origin of replication in E. coli to begin the process of DNA synthesis?
View answer and explanationWhat is the primary function of the sliding clamp protein during DNA replication?
View answer and explanationDuring DNA replication, what is the role of Single-stranded binding protein (SSB)?
View answer and explanationIn E. coli, what is the approximate length of the oriC sequence, the origin of replication?
View answer and explanationWhich enzyme is primarily responsible for removing RNA primers and filling in the resulting gaps with DNA during replication in prokaryotes?
View answer and explanationWhat are the short, discontinuously synthesized fragments of DNA on the lagging strand called?
View answer and explanationWhat is the 'trombone model' used to describe in the context of DNA replication?
View answer and explanationWhat is the primary reason for the much slower speed of eukaryotic replication forks compared to prokaryotic ones?
View answer and explanationWhat is the 'end replication problem' that affects linear eukaryotic chromosomes?
View answer and explanationHow does the enzyme telomerase counteract the shortening of chromosomes?
View answer and explanationWhat is the specific repeating DNA sequence found in human telomeres?
View answer and explanationBesides germ cells and stem cells, in which other type of cell is telomerase often expressed at high levels, allowing for bypass of senescence?
View answer and explanationWhat is a major difference in how replication is initiated in eukaryotes compared to prokaryotes?
View answer and explanationThe intermediate structures formed during the replication of a circular prokaryotic chromosome are sometimes referred to by what name, due to their appearance?
View answer and explanationWhat is the approximate speed of a eukaryotic replication fork?
View answer and explanationWhat is the function of topoisomerase enzymes during DNA replication?
View answer and explanationWhich statement accurately describes the directionality of the leading and lagging strands relative to the movement of the replication fork?
View answer and explanationWhat is the main biochemical limitation of DNA polymerases that necessitates the use of a primase?
View answer and explanationWhat provides the energy for the formation of a phosphodiester bond during DNA synthesis?
View answer and explanationIn the central dogma, what is the term for discrete units within the DNA sequence that are organized to be transcribed into RNA?
View answer and explanationWhat is the primary difference between the sugar component in DNA versus RNA?
View answer and explanationHow do telomerase inhibitors represent a potential therapeutic strategy against cancer?
View answer and explanationWhich of the following describes a key difference between the leading strand and the lagging strand during DNA replication?
View answer and explanationWhat is the role of DNA ligase in the replication process?
View answer and explanationIf a hypothetical eukaryotic chromosome of 48 megabases were replicated from a single origin at a speed of 50 base pairs per second, how long would it take to replicate?
View answer and explanationWhat is the function of the clamp loader enzyme during DNA replication?
View answer and explanationWhat type of molecule serves as the template for the enzyme telomerase?
View answer and explanationWhich exception to the central dogma involves the creation of a DNA molecule from an RNA template?
View answer and explanationIn the list of proteins and enzymes of the replisome, which one is responsible for extending the primers with new DNA, performing most of the synthesis in prokaryotes?
View answer and explanationWhat is the collective term for the entire complex of proteins and enzymes that performs DNA replication?
View answer and explanationWhat is the Y-shaped edge of a replication bubble, where the DNA transitions from double-stranded to single-stranded, called?
View answer and explanationWhy is the information transfer from protein to protein, as seen in prion diseases, considered an exception to the Central Dogma?
View answer and explanationIn eukaryotes, which two DNA polymerases perform the majority of leading and lagging strand synthesis, respectively?
View answer and explanationWhat is the eukaryotic protein equivalent of the prokaryotic sliding clamp?
View answer and explanationWhat is the consequence of the end replication problem for most eukaryotic cells over time?
View answer and explanationWhy do the two strands of the double helix need to be held apart during replication?
View answer and explanationWhich statement correctly describes the antiparallel nature of DNA synthesis?
View answer and explanationIn the context of DNA replication, what is a Y-shaped replication fork?
View answer and explanationWhat is the reason that telomere shortening is thought to play a role in cellular aging?
View answer and explanationWhich of these components is part of the replisome but is NOT an enzyme that catalyzes a chemical reaction?
View answer and explanationWhat is the biological reason that eukaryotic chromosomes require multiple origins of replication to be replicated efficiently?
View answer and explanationWhy must the synthesis of leading and lagging strands occur simultaneously despite their different mechanisms?
View answer and explanationWhat is the key difference between DNA Polymerase I and DNA Polymerase III in E. coli?
View answer and explanationWhat would be the direct consequence if a cell's DNA ligase enzyme were non-functional?
View answer and explanationThe Nobel Prize in 2009 was awarded for the discovery of the mechanism of which enzyme, important for understanding aging and cancer?
View answer and explanationWhich of the following molecules is NOT a core component of the prokaryotic replisome?
View answer and explanationIn eukaryotes, which enzyme is responsible for breaking down the RNA primers during replication?
View answer and explanationWhat is the primary reason the cell uses an RNA primer for DNA replication instead of a DNA primer?
View answer and explanation