Tagged: Ribonucleotides

trial 4 0

Hydroxyurea in the treatment of Leukemia

Case details A physician evaluates a 32-year-old patient for fatigue. The patient is found to have an elevated white blood cell count and an enlarged spleen. A referral to an oncologist results in a diagnosis of chronic myelogenous leukemia. Treatment with hydroxyurea, a ribonucleotide reductase inhibitor is begun. The normal functioning of this enzyme is to do which of the following? A. Converts xanthine to uric acid B. Converts ribonucleotides to deoxyribonucleotides C. Degrades guanine to xanthine D. Degrades AMP to IMP E. Converts PRPP to phosphoribosylamine   The correct answer is- B- Converts ribonucleotides to deoxyribonucleotides. Either hydroxyurea or...

trial 4 0

Answer- Case study- DNA Replication- A scientist is replicating human DNA in a test tube…

A scientist is replicating human DNA in a test tube and has added intact DNA, the replisome complex, and the four deoxyribonucleoside triphosphates. To the surprise of the scientist, there was no DNA synthesized, as determined by the incorporation of radio-labeled precursors into acid-precipitable material. The scientist’s failure to synthesize DNA is most likely due to a lack of which of the following in his reaction mixture? A. Reverse transcriptase B. Ribonucleoside triphosphates C. Templates D. Dideoxynucleoside triphosphates E. Sigma factor The answer is B: Ribonucleoside triphosphates. DNA Replication is the basis for inheritance. It is the fundamental process occurring in...

trial 4 2

Case study- Replication-A scientist is replicating human DNA in a test tube ..

QUESTION OF THE DAY A scientist is replicating human DNA in a test tube and has added intact DNA, the replisome complex, and the four deoxyribonucleoside triphosphates.   Figure- DNA Replication To the surprise of the scientist, there was no DNA synthesized, as determined by the incorporation of radio-labeled precursors into acid-precipitable material. The scientist’s failure to synthesize DNA is most likely due to a lack of which of the following in his reaction mixture? A. Reverse transcriptase B. Ribonucleoside triphosphates C. Templates D. Dideoxynucleoside triphosphates E. Sigma factor For answer follow the link http://usmle.biochemistryformedics.com/answer-case-study-dna-replication-a-scientist-is-replicating-human-dna-in-a-test-tube/ Please help Biochemistry for Medics...

Copy Protected by Chetan's WP-Copyprotect.