A student mixes various molecule needed for DNA replication. When he adds DNA, replication occurs, but each DNA duplex consists of a normal DNA strand paired with numerous segments of DNA a few hundred nucleotides long. What has been left out of the mixture? A. NTPs B. DNA polymerase III C. ATP D. DNA polymerase I E. DNA ligase

A student mixes various molecule needed for DNA replication. When he adds DNA, replication occurs, but each DNA duplex consists of a normal DNA strand paired with numerous segments of DNA a few hundred nucleotides long. What has been left out of the mixture? A. NTPs B. DNA polymerase III C. ATP D. DNA polymerase I E. DNA ligase

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter8: Dna Structure And Function

Section: Chapter Questions

Problem 9SA: Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from...

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The phrase 5to3 refers to the _________ . a. timing of DNA replication b. directionality of DNA synthesis c. number of phosphate groups
Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from ________. a. the nucleotide b. DNA polymerase c. phosphate-group transfers from ATP
The initial mechanism for repairing nucleotide errors in DNA is _____. a. mismatch repair b. DNA polymerase proofreading c. nucleotide excision repair d. thymine dimers
Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from ______. a. phosphate-group transfers from ATP b. DNA polymerase c. the nucleotide itself d. a and c
During DNA replication, the helicase enzyme binds to DNA and Select one: a. prevents the DNA strands from rewinding back into the helical shape b. cuts the double stranded DNA into single strands c. provides the starting point where new nucleotides can be added d. adds new nucleotides to the template strand
(a) What is the function of helicase in DNA replication?(b) What is the function of DNA polymerase?(c) What are replication forks? Compare and contrast leading and lagging strands. Answer all please
When two adjacent bases in the same strand of DNA dimerize (form a covalent bond between them), what happens to the DNA? a. the original strand of DNA now contains a new DNA sequence b. the original strand of DNA is prevented from opening during replication, so this section of DNA will not be replicated c. the original strand of DNA is methylated, which causes the bases to mismatch d. the original strand of DNA is kinked, which prevents DNA polymerase from working properly e. the original strand of DNA is unaffected, so no additional mutations arise
What are major functions that DNA polymerase performs? A. unzips the DNA strand and makes the new nucleotides B. proof reads the new DNA strands for errors and corrects them C. bonds the nucleotides together forming the new DNA strand D. A, B, and C E. A and B F. B and C G. A and C
Nucleotide excision repair A. recognizes and repairs thymine dimers and other damaged bases in DNA B. corrects errors in nucleotide excision C. recognizes and removes mismatched bases after DNA synthesis is completed D. removes nucleotides that are incorrectly incorporated during DNA synthesis
Without the action of DNA ligase, cells would not be ableto complete their replication. What is the function of DNAligase?(a) Unzips the DNA double helix(b) Stabilizes single-stranded DNA(c) Binds DNA sequences together to generate acontinuous strand(d) Proofreads the replication process(e) Creates an RNA copy of the DNA
A drug that inhibits the DNAa protein is added to a culture of E. coli cells. What is the first step of DNA replication that will be impaired by this drug? PICK ONE ANSWER: A. Keeping parent DNA strands separated B. Releasing tension generated by supercoiling C. Activating the origin of replication D. Making primers E. Forming phosphodiester bonds
A scientist uses a molecule of DNA composed of radioactive nucleotides as a template for replication and transcription in a nonradioactive environment. a) What percentage of individual strands of DNA will be radioactive after three (3) DNA replication cycles? 2. b) What percentage of RNA will be radioactive?