
Concept explainers
Which of the following is not a property of DNA polymerase?
a. It adds dNTPs only in the 5' → 3' direction.
b. It requires a primer to work.
c. It is associated with a sliding clamp only on the leading strand.
d. Its exonuclease activity is involved in proofreading.

Introduction:
DNA (deoxyribonucleic acid) polymerase is the enzyme responsible for the replication of DNA. The enzymes incorporate the deoxyribonucleotides (dNTPs) into the newly synthesizing DNA molecule from the template DNA. The sliding clamp acts as a processivity promoter factor in the DNA replication. It is crucial for DNA polymerase binding to the template DNA as it prevents the frequent dissociation of the DNA polymerase from the template DNA.
Answer to Problem 1TYK
Correct answer:
The association with the sliding clamp only on the leading strand is not the property of DNA polymerase.
Explanation of Solution
Explanation/Justification for the correct answer:
Option (c) is given as association of DNA polymerase only with sliding clamp on the leading strand. The DNA polymerase is associated with the sliding clamp protein in the leading as well as with the lagging strand. Hence, the Option (c) is correct.
Explanation for incorrect answers:
Option (a) is given as adding of dNTPs only in the
Option (b) is given as primer is needed for DNA polymerase. The primer is an oligonucleotide (short stretch of DNA or RNA [ribonucleic acid]) and is required for the synthesis of DNA using DNA polymerase. So, it is an incorrect option.
Option (d) is given as proofreading is associated with exonuclease activity of DNA polymerase. The enzyme also has an exonuclease activity for proofreading of newly synthesized DNA. These are the property of DNA polymerase. So, it is an incorrect option.
Hence, the options (a), (b), and (d) are incorrect.
DNA polymerase catalyzes the addition of dNTPs in the
Want to see more full solutions like this?
Chapter 15 Solutions
Biological Science (6th Edition)
- What did the Cre-lox system used in the Kikuchi et al. 2010 heart regeneration experiment allow researchers to investigate? What was the purpose of the cmlc2 promoter? What is CreER and why was it used in this experiment? If constitutively active Cre was driven by the cmlc2 promoter, rather than an inducible CreER system, what color would you expect new cardiomyocytes in the regenerated area to be no matter what? Why?arrow_forwardWhat kind of organ size regulation is occurring when you graft multiple organs into a mouse and the graft weight stays the same?arrow_forwardWhat is the concept "calories consumed must equal calories burned" in regrads to nutrition?arrow_forward
- You intend to insert patched dominant negative DNA into the left half of the neural tube of a chick. 1) Which side of the neural tube would you put the positive electrode to ensure that the DNA ends up on the left side? 2) What would be the internal (within the embryo) control for this experiment? 3) How can you be sure that the electroporation method itself is not impacting the embryo? 4) What would you do to ensure that the electroporation is working? How can you tell?arrow_forwardDescribe a method to document the diffusion path and gradient of Sonic Hedgehog through the chicken embryo. If modifying the protein, what is one thing you have to consider in regards to maintaining the protein’s function?arrow_forwardThe following table is from Kumar et. al. Highly Selective Dopamine D3 Receptor (DR) Antagonists and Partial Agonists Based on Eticlopride and the D3R Crystal Structure: New Leads for Opioid Dependence Treatment. J. Med Chem 2016.arrow_forward
- The following figure is from Caterina et al. The capsaicin receptor: a heat activated ion channel in the pain pathway. Nature, 1997. Black boxes indicate capsaicin, white circles indicate resinferatoxin. You are a chef in a fancy new science-themed restaurant. You have a recipe that calls for 1 teaspoon of resinferatoxin, but you feel uncomfortable serving foods with "toxins" in them. How much capsaicin could you substitute instead?arrow_forwardWhat protein is necessary for packaging acetylcholine into synaptic vesicles?arrow_forward1. Match each vocabulary term to its best descriptor A. affinity B. efficacy C. inert D. mimic E. how drugs move through body F. how drugs bind Kd Bmax Agonist Antagonist Pharmacokinetics Pharmacodynamicsarrow_forward
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage LearningBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningConcepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage LearningEssentials of Pharmacology for Health ProfessionsNursingISBN:9781305441620Author:WOODROWPublisher:Cengage




