Pyrimidine - Study guides, Class notes & Summaries

Biochemistry Section-USMLE Step 1 2024 Questions and Answers which histone ties DNA-histone nucleosome beads into more condensed structures? - answerH1 is DNA acidic or basic? - answeracidic what type of aa are histones made of? are they acidic or basic? - answerlysine and arginine; basic is heterochromatic more accessible or less accessible to TF? euchromatin? - answerless; more if a cell has a hyperchromatic or condensed nucleus is it undergoing transcription etc? - answerno what ar...

Bond between phosphate and sugar? - phosphodiester Bond between sugar and base? - glycosidic Non-covalent interactions? - H bonding, base stacking, electrostatic interactions Chargaff rules? - purine content = pyrimidine content adenine = thymine guanine = cytosine

USLME - Biochemistry (General Questions) Exam Questions With Accurate Answers. Histones are rich in what AAs? - answerLysine and arginine (both + charge) When does histone synthesis occur? - answerS phase (along with DNA getting synthesized) Heterochromatin is _________, euchromatin is _________ - answerInactive/condensed; active/accessible What allows mismatch repair enzymes to distinguish between old and new DNA strands in prokaryotes? - answerMethylation; old/template strands are meth...

USLME Biochem - First Aid Exam Questions With Accurate Answers. Chromatin structure - answerDNA exists in condensed chromatin form in order to fit in nucleus Negatively charged DNA loops twice around positively charged histone octamer (2 sets of H2A, H2B, H3 and H4) to form nucleosome "bead" Octomer subunits consist primarily of lysine and arginine amino acids (positively charged). H1 ties nucleosome beads together in a string Heterochromatin - answerCondensed, transciptionally inactiv...

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...

Adenine Ans A purine base, forms a base pair with thymine in DNA and with uracil in RNA Guanine Ans Purine base that pairs with cytosine in DNA and RNA. Cytosine Ans Pyrimidine base that pairs with Guanine with DNA and RNA. Thymine Ans Pyrimidine base that pairs with Adenine in DNA. Uracil Ans Pyrimidine base that pairs with Uracil in RNA. nucleoside Ans base + sugar nucleotide Ans base + sugar + phosphate Numbering convention for pentose ring Ans Deoxynucleotide Ans Modified n...

TEST BANK FOR GENETICS AND GENOMICS IN NURSING AND HEALTH CARE 1ST EDITION 1. In which body or cell area are most genes in humans located? A. Nucleus B. Mitochondrion C. Cytoplasm D. Plasma membrane 2. Which condition or statement exemplifies the concept of genomics rather than genetics? A. The gene for insulin is located on chromosome 11 in all people. B. Expression of any single gene is dependent on inheriting two alleles. C. Sex-linked recessive disorders affect males more o...

TEST BANK FOR GENETICS AND GENOMICS IN NURSING AND HEALTH CARE 2ND EDITION BY THERESA BEERY, LINDA 1. In which body or cell area are most genes in humans located? A. Nucleus B. Mitochondrion C. Cytoplasm D. Plasma membrane ____ 2. Which condition or statement exemplifies the concept of genomics rather than genetics? A. The gene for insulin is located on chromosome 11 in all people. B. Expression of any single gene is dependent on inheriting two alleles. C. Sex-linked recessive disorders...

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?...

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...