How does DNA polymerase III synthesize the leading and lagging strands during DNA replication? a) It elongates both the leading and lagging strands continuously.b) It elongates the leading strand continuously and the lagging strand discontinuously. c) It elongates the leading strand discontinuously and the lagging strand continuously. d) It elongates both the leading and lagging strands discontinuously.What is a holoenzyme? a) An enzyme that catalyzes the replication of DNA b) A complex formed by multiple proteins that enhances enzyme function c) An enzyme that repairs DNA damage d) A protein that binds to DNA and regulates gene expressionHow many copies of DNA polymerase III are found in the replisome during DNA replication in E. coli? a) One b) Two c) Three d) FourWhich enzyme is responsible for elongating the leading strand continuously during DNA replication?a) DNA ligaseb) Helicasec) DNA polymerase IIId) PrimaseWhat is the role of the clamp and sliding clamp in DNA replication?a) They provide energy for the helicase complex.b) They act as DNA polymerases.c) They ensure coordination between DNA unwinding and DNA synthesis.d) They repair the gaps between Okazaki fragments.Which of the following accurately describes the role of DNA polymerase in DNA replication?a) DNA polymerase catalyzes the formation of a new phosphodiester bond attaching cytosine monophosphate to the 5' end of the new strand.b) DNA polymerase catalyzes the formation of a new phosphodiester bond attaching guanosine monophosphate to the 3' end of the new strand.c) DNA polymerase catalyzes the formation of a new phosphodiester bond attaching adenine monophosphate to the 5' end of the new strand.d) DNA polymerase catalyzes the formation of a new phosphodiester bond attaching thymine monophosphate to the 3' end of the new strand.What enzyme synthesizes daughter DNA strands in E. coli during DNA replication? a) DNA polymerase I b) DNA polymerase II c) DNA polymerase III d) DNA polymerase IVWhat enzyme catalyzes the formation of a phosphodiester bond to join Okazaki fragments and seal the gap between the segments during DNA replication?a) DNA polymerase IIIb) DNA polymerase Ic) DNA helicased) DNA ligaseWhat are Okazaki fragments?a) Small pieces of DNA that form on the leading strand during DNA replicationb) Long stretches of DNA that form on the lagging strand during DNA replicationc) RNA primers synthesized by primase during DNA replicationd) Short segments of DNA synthesized on the lagging strand during DNA replicationWhat ensures coordination between DNA unwinding and DNA synthesis during replication?a) DNA ligaseb) Helicasec) Primased) Sliding clampWhat is the function of the replisome during DNA replication? a) It synthesizes RNA primers b) It repairs DNA damage c) It synthesizes daughter DNA strands on the leading and lagging strands simultaneously d) It removes RNA primers from DNAWhich direction does the template strand of DNA typically proceed during replication?a) From 3' to 5'b) From 5' to 3'c) It does not have a specific directiond) It proceeds randomlyRNA primer removal and gap sealing:What enzyme replaces pol I at DNA-DNA single-stranded gaps and catalyzes the formation of a phosphodiester bond to join Okazaki fragments, sealing the gap between the segments?Which of the following describes the process catalyzed by DNA polymerase?a) The activated 3' OH of the deoxyguanosine in the growing strand attacks the triphosphate group of the incoming dGTP.b) The activated 5' OH of the deoxyadenosine in the growing strand attacks the triphosphate group of the incoming dATP.c) The activated 3' OH of the deoxyadenosine in the template strand attacks the triphosphate group of the incoming dGTP.d) The activated 5' OH of the deoxyguanosine in the template strand attacks the triphosphate group of the incoming dATP.What enzyme is primarily responsible for preventing the reannealing of single-stranded DNA during DNA replication?a) DNA ligaseb) Helicasec) Single-stranded binding (SSB) proteind) PrimaseWhich enzyme is responsible for synthesizing RNA primers during DNA replication?a) DNA ligaseb) DNA polymerase IIIc) Primase d) HelicaseDNA nucleotides have a deoxyribose sugar, which means they lack a ______________ group at the 2' position of the sugar ring.a. Oxygenb. Hydroxylc. Phosphated. CarbonWhat is the role of helicase in DNA replication?a) Helicase catalyzes the formation of phosphodiester bonds between nucleotides. b) Helicase synthesizes new DNA strands using a template strand. c) Helicase unwinds the DNA double helix by breaking hydrogen bonds between base pairs. d) Helicase proofreads newly synthesized DNA strands for errors.In the process of DNA replication, which step involves the synthesis of RNA primers?a) Step 1: Unwinding of the DNA double helix b) Step 2: Separation of DNA strands c) Step 3: Synthesis of RNA primers by Primase d) Step 4: Synthesis of daughter strands by DNA polymerase IIIWhat is the role of Primase in DNA replication?a) Initiating DNA strand synthesis de novo b) Synthesizing RNA primers to initiate DNA strand synthesis c) Elongating DNA strands by adding nucleotides d) Proofreading newly synthesized DNA strands
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