Pyrimidine Study guides, Class notes & Summaries

USMLE Step 1 First Aid - Biochemistry 2024 Study Guide(100% Verified) Side = base + (deoxy)ribose [sugar] Tide = base + (deoxy)ribose [sugar] *Which are the purines?* "pure as gold" = Adenosine, Guanosine *Which are the pyrimidines?* "CUT the pyramid" = Cytosine, Uracil, Thymine - answerWhat is a nucleoside? What is a nucleotide? Which are the purines? Which are the pyrimidines? *Disrupt pyrimidine synthesis* *Leflunomide: *inhibits dihydroorate dehydrogenase *Methotrexatem Tri...

Pyrimidine dimers formed in DNA due to UV radiation can be repaired by? SOS repair Double strand break repair Mismatch repair Photoreactivation repair (nucleotide excision repair) Base excision repair - CORRECT ANSWER Photoreactivation repair (nucleotide excision repair) Which of the following repair mechanisms uses methyl groups to distinguish between parental and daughter strands? Answers: Mismatch repair Photoreactivation repair (Nucleotide excision repair) SOS repair Doub...

Define essential steps of the signaling cascade correct answer: Signal Receptor Signaling molecule (can send a second messenger) Shorter and Longer effects Three types of signals correct answer: paracrine, autocrine, endocrine Phases of eukaryotic cell cycle and their duration correct answer: • G0: exit from cell cycle (nondividing) • G1: duplicates organelles, cytosolic components, begins replicating centrosome (8-10hrs) - Prep for DNA synthesis • S/interphase: DNA is repli...

Allopurinol is an inhibitor of Xanthine Oxidase. Addition of this compound will result in a decrease in what compound? correct answer: Uric Acid DNA replication occurs during which phase of the cell cycle? correct answer: S phase The affinity for DNA and histones within a chromosome can be increased by which of the following histone modifications? correct answer: Deaceytlation DNA replication on both the leading and the lagging strand proceeds in the 5' to 3' direction. The remaini...

MCAT Practice Exam Questions and Answers Latest 2023/2024 | 100% Correct. Thin layer chromatography can use silica plates which are very polar. Will polar or non polar substances have lower Rf values on this plate? Polar substances - they will have a higher affinity for the silica and thus will not travel as far as the non polar substances A titration of a strong acid with a strong base or vice versa has an equivalence point around what pH? 7 What type of bond is usually disrupted during de...

Pyrimidine dimers formed in DNA due to UV radiation can be repaired by? SOS repair Double strand break repair Mismatch repair Photoreactivation repair (nucleotide excision repair) Base excision repair - CORRECT ANSWER Photoreactivation repair (nucleotide excision repair) Which of the following repair mechanisms uses methyl groups to distinguish between parental and daughter strands? Answers: Mismatch repair Photoreactivation repair (Nucleotide excision repair) SOS repair Doubl...

DNA - correct answer Are made up of 46 chromosomes that have alleles within them that with those alleles Prion - correct answer Are misfolded proteins that cause other similar proteins to misfold Not made of cells. Not have DNA RNA. Are not viruses Are causative of Mad cow disease Non-Coding DNA - correct answer Promoters and introns(parts of process) 98% of genome is noncoding - DNA that doesn't get coded into a protein RNA - correct answer Ribonucleic acid; a type of nucle...

Pyrimidine - One carbon ring Cytosine, Thymine, Uracil Purine - Two carbon rings Adenine, Guanine How are nucleotides joined together? - Condensation to form phosphodiester bond What is the function of mRNA? - Carries genetic info out of nucleus Transcript translated to protein What is the function of tRNA? - Carries aa to ribosome Anticodon pairs with codon on mRNA strand What is the function of rRNA? - part of ribosome structure most abundant RNA coordinated coupling of tRNA to mRNA...

Long case of Afro-Caribbean patient. He had severe ankle swelling. Which of the following drug cause this condition a. Nifedipine b. Losartan c. Metoprolol d. spiranolacon - Answer- Nifedipine Lexicomp: Cardiovascular: Flushing (IR: 25%; ER: <3%), peripheral edema (4% to 30%). google: Some swelling of the feet and ankles occurs in almost half the people who take calcium channel blockers which condition nasal spray of steroid is contraindicated a. deviated septum b. post nasal...

Bio 107 Exam 1 Questions with Correct Answers Graded A+ What does a nucleotide structure have? Nitrogenous base Sugar Phosphate group What do nucleotides form when they are chemically connected together? DNA strand What are the two nitrogenous bases? Pyrimidine and Purine What is included in the pyrimidine group? Cytosine (C) Thymine (T) Uracil (U) What is included in the purine group? Adenine (A) Guanine (G) Which of the following is only included in the DNA group C, T, U, A, or G?...