Call us toll-free

Quick academic help

Don't let the stress of school get you down! Have your essay written by a professional writer before the deadline arrives.

Calculate the price

Pages:

275 Words

$19,50

synthesis of a new strand of DNA.

The rcDNA genome is converted intocccDNA by cellular repair factors. Then, the cccDNA is transcribedto the pgRNA and subgenomic mRNAs (not shown). The mRNAs aretransported to the cytoplasm. The pgRNA is translated in thecytosol to form HBV core protein and the viral polymerase. Thesethree components assemble to form the core particle. The first(minus) DNA strand forms within the core particles via reversetranscription of the pgRNA to DNA; the pgRNA is degraded by viralRNase H as the plus strand is synthesized. (A) A3B inhibits thebinding of HnRnp K to the Enh II of HBV; (B) A3G may inhibit pgRNApackaging; (C) A3G renders HBV core protein-associated full-lengthpgRNA nuclease-sensitive; (D) A3G blocks DNA strand elongation andtargets a DNA-RNA hybrid. rcDNA, relaxed circular DNA; cccDNA,covalently closed circular DNA; pgRNA, pregenomic RNA; HBV,hepatitis B virus; APOBEC, apolipoprotein B mRNA editing enzyme,catalytic polypeptide-like; HnRnp K, heterogeneous nuclearribonucleoprotein K; Enh II, enhancer II.

10/4/2009 · The enzyme that catalyzes the synthesis of new DNA molecules is called a

There are three key differences between replication and transcription: (1) RNA molecules are much shorter than DNA molecules; only a portion of one DNA strand is copied or transcribed to make an RNA molecule. (2) RNA is built from ribonucleotides rather than deoxyribonucleotides. (3) The newly synthesized RNA strand does not remain associated with the DNA sequence it was transcribed from.

The new continuous complementary DNA strand synthesized ..

Answer to The enzyme that catalyzes the synthesis of new DNA molecules is called A) DNA helicase

The DNA sequence that is transcribed to make RNA is called the , while the complementary sequence on the other DNA strand is called the or . To initiate RNA synthesis, the two DNA strands unwind at specific sites along the DNA molecule. Ribonucleotides are attracted to the uncoiling region of the DNA molecule, beginning at the 3′ end of the template strand, according to the rules of base pairing. Thymine in DNA calls for adenine in RNA, cytosine specifies guanine, guanine calls for cytosine, and adenine requires uracil. RNA polymerase—an enzyme—binds the complementary ribonucleotide and catalyzes the formation of the ester linkage between ribonucleotides, a reaction very similar to that catalyzed by DNA polymerase (). Synthesis of the RNA strand takes place in the 5′ to 3′ direction, antiparallel to the template strand. Only a short segment of the RNA molecule is hydrogen-bonded to the template strand at any time during transcription. When transcription is completed, the RNA is released, and the DNA helix reforms. The nucleotide sequence of the RNA strand formed during transcription is identical to that of the corresponding coding strand of the DNA, except that U replaces T.

The nucleus contains all the necessary enzymes, proteins, and nucleotides required for this synthesis. A short segment of DNA is “unzipped,” so that the two strands in the segment are separated to serve as templates for new DNA. DNA polymerase, an enzyme, recognizes each base in a template strand and matches it to the complementary base in a free nucleotide. The enzyme then catalyzes the formation of an ester bond between the 5′ phosphate group of the nucleotide and the 3′ OH end of the new, growing DNA chain. In this way, each strand of the original DNA molecule is used to produce a duplicate of its former partner (). Whatever information was encoded in the original DNA double helix is now contained in each replicate helix. When the cell divides, each daughter cell gets one of these replicates and thus all of the information that was originally possessed by the parent cell.

strand breaks in DNA, PARP-1 catalyzes the synthesis of ..

Polymerase-1 Inhibits Strand-Displacement Synthesis of DNA Catalyzed ..

Enzymes called DNA polymerazes catalyze the synthesis of new DNA by adding from BS 161 at Michigan State University
Order now
  • UNMATCHED QUALITY

    As soon as we have completed your work, it will be proofread and given a thorough scan for plagiarism.

  • STRICT PRIVACY

    Our clients' personal information is kept confidential, so rest assured that no one will find out about our cooperation.

  • COMPLETE ORIGINALITY

    We write everything from scratch. You'll be sure to receive a plagiarism-free paper every time you place an order.

  • ON-TIME DELIVERY

    We will complete your paper on time, giving you total peace of mind with every assignment you entrust us with.

  • FREE CORRECTIONS

    Want something changed in your paper? Request as many revisions as you want until you're completely satisfied with the outcome.

  • 24/7 SUPPORT

    We're always here to help you solve any possible issue. Feel free to give us a call or write a message in chat.

Order now
  • You submit your order instructions

  • We assign an appropriate expert

  • The expert takes care of your task

  • We send it to you upon completion

Order now
  • 37 684

    Delivered orders

  • 763

    Professional writers

  • 311

    Writers online

  • 4.8/5

    Average quality score

Order now
  • Kim

    "I have always been impressed by the quick turnaround and your thoroughness. Easily the most professional essay writing service on the web."

  • Paul

    "Your assistance and the first class service is much appreciated. My essay reads so well and without your help I'm sure I would have been marked down again on grammar and syntax."

  • Ellen

    "Thanks again for your excellent work with my assignments. No doubts you're true experts at what you do and very approachable."

  • Joyce

    "Very professional, cheap and friendly service. Thanks for writing two important essays for me, I wouldn't have written it myself because of the tight deadline."

  • Albert

    "Thanks for your cautious eye, attention to detail and overall superb service. Thanks to you, now I am confident that I can submit my term paper on time."

  • Mary

    "Thank you for the GREAT work you have done. Just wanted to tell that I'm very happy with my essay and will get back with more assignments soon."

Ready to tackle your homework?

Place an order