Ligase - Study guides, Class notes & Summaries

Why do helicase and gyrase need to work together? correct answers Helicase unwinds DNA and gyrase relieves the torsional strain. Match the name of the DNA repair mechanism with the correct description. Functions with DNA replication to remove incorrect nucleotides from the nascent strand. Requires an endonuclease to remove an abasic nucleotide before DNA Pol I can replace a portion of the strand. Is needed to repair chemical damage in DNA effecting more than one nucleotide, such as c...

BIOCHEM BRS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED A bacterial mutant grows normally at 32°C but at 42°C accumulates short segments of newly synthesized DNA. Which one of the following enzymes is most likely to be defective at the nonpermissive temperature (the higher temperature) in this mutant? (A) DNA primase (B) DNA polymerase (C) An exonuclease (D) An unwinding enzyme (helicase) (E) DNA ligase (E) DNA ligase An RNA produced from a fragment of DNA has the seq...

Which of the following build(s) new strands of DNA? - ANSWER DNA polymerases Which statement about DNA replication is CORRECT? - ANSWER The leading strand is built continuously, and the lagging strand is built in pieces. The molecule that seals the gaps between the pieces of DNA in the lagging strand is - ANSWER DNA ligase. Which of the following events occurs during transcription? - ANSWER A molecule of RNA is formed based on the sequence of nucleotides in DNA. mRNA? - ANSWER mRNA m...

What genes would be screened in a lung cancer panel? correct answersKRAS, EGFR, ALK In a retrovirus, the RNA acts as: correct answersGenome and mRNA To what does the AcrAB gene product create resistance to? correct answersTetracycline What gene is measured following the treatment with imatinib(Gleevec)? correct answersBCR/Abl Blood drawn into what type of tube is compatible for genetic testing? correct answersK2-EDTA tube Primer dimers are due to what complimentary issue? correct ...

A&P 1 Final Exam, Straighterline Anatomy and Physiology 1, Straighterline A&P 1 Cumulative Final EXAMS WITH 100% CORRECT ANSWERS The cellular level includes the nucleus, an organelle that contains the body's genetic information. Which is an example of a normally occurring positive-feedback mechanism? Select one: a. elevated blood pressure during exercise b. increase in heart rate after blood loss c. decrease in blood pressure after blood loss d. stretching of the uterus near ...

A&P 1 Final Exam, Straighterline Anatomy and Physiology 1, Straighterline A&P 1 Cumulative Final 100% Pass What is the smallest level of organization in the body that contains the body's genetic information? Select one: a. chemical b. cellular c. tissue d. organism B. Cellular The cellular level includes the nucleus, an organelle that contains the body's genetic information. Which is an example of a normally occurring positive-feedback mechanism? Select one: a. elevated...

Males and Females are equally affected - Autosomal The process of copying DNA in the lab. - Polymerase Chain Reaction (PCR) Template DNA, Nucleotides (dNTPS), DNA Polymerase, and DNA Primers. - What is needed for Polymerase Chain Reaction? Denaturing, Annealing, Elongating - What are the three steps of a Polymerase Chain Reaction (PCR)? Denaturing (DNA is heated up to separate it) - What is the first step of a Polymerase Chain Reaction? Cooling the Polymerase Chain Reaction. Primers stick ...

ADVANCED PLACEMENT (AP) BIOLOGY: Dna, Rna, And Proteins 181 Questions Correctly Answered | 100% Rated Question 1 Which type of mutation does not change an organism's phenotype despite changing its genotype? Possible Answers: Frameshift Missense Silent Nonsense Correct answer: Silent Question 2 What would be an immediate consequence for a cell with a mutant version of DNA polymerase III that has lost its proofreading function? Possible Answers: Cancer Inability to complete th...

A&P 1 Final Exam, Straighterline Anatomy and Physiology 1, Straighterline A&P 1 Cumulative Final Exam Questions And Answers What is the smallest level of organization in the body that contains the body's genetic information? Select one: a. chemical b. cellular c. tissue d. organism - ANS B. Cellular The cellular level includes the nucleus, an organelle that contains the body's genetic information. Which is an example of a normally occurring positive-feedback mechanism? Sel...

What modification neutralizes the charges on histones and looses up the interactions between histones and DNA? - Answer- ACETYLATION Two types of post-transcriptional modifications that take place in the mRNA of eukaryotes - Answer- the addition of a CAP at the 5' end of the transcript and the addition of a POLY A sequence at the 3' end of the message Nucleic acid blotting is widely used in recombinant DNA technology. In a Southern blot one generally - Answer- Hybridizes filter-bound DNA...