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First Aid: Biochemistry Molecular

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Three amino acids necessary for purine synthesis= glutamine - aspartate and glycine






2. Unwinds DNA template at replication fork






3. Tansport cellular cargo toward opposite ends of microtubule tracks






4. Substituting a pyramidine for a pyrimadine






5. Specific glycosylases recognize and remove damaged bases - AP endonuclease cuts DNA at pyrimidne site - empty sugar is removed and the gap is filled and resealed






6. Microvilli - muscle contraction - cytokinesis - adhering juntions






7. Unmethylated - newly synthesized string is recognized - mismatched nucleotides are removed and the gap is filled and resealed






8. Methionine - which may be removed before translation is completed






9. Close to - far from or even within (in an intron) the gene whose expression it regulates






10. Proline - glycine






11. 2 H bonds greater GC content greater melting point






12. Made from orogate precuror with PRPP added later






13. Neuroglia






14. Asymmetric fluid bilayer - contains - cholesterol - phospholipids - sphingoplipids - glycolipids - and protiends






15. Phosphorylation - glycosloation - hyderoxylation






16. 1) primary transcript combines with snRNPs and other proteins to form spliceosome 2) lariat shaped intermediate is generated 3) Lariat is removed and released to precisely join 2 exons






17. Bind 30S subunit preventing attachment of aminoacyl - tRNA






18. Mutation in nucleotide excision repair Dry skin with melanoma and other cancers






19. Hn RNA






20. Responsible for the accuracy of amino acid selection






21. Xlinked recessive IV collagen bm - kidney - ear and eye -- nephritis and defness ocular disturbances






22. 1P blocked by chloramphenicaol and macrolide






23. ATP ase that links peripheral 9 doublets and causes bending of cilium by differential sliding of doublets






24. You glyucosolate hte pro - alpha chain lysine resudens and form procollagen (triple helix of alpha chains)






25. Accurate base pairing is required only in the first 2 nucleotide positions of an mRNA so codons differing ht e3rd wobble psoition may code for the same tRNA/amino acid code






26. Faulty collagen synthesis causing 1) hyperextensible skin 2) tendency to bleed 3) hypermobile joints






27. Site of secretory protiens (mucus secreting goblet cells and antibody secreting cells)






28. The 5prime end (energy for the bond)






29. Greater melting temperature lower fluidity






30. Less condensed - transciptionally active=eu truly transcobed






31. 75-90 nucleotides - 2ary structure cloverleaf form anticodon end is opposite 3 prime aminoacyl end






32. One codon AUG






33. Inhibits dihydrofolate reductase down thymine






34. Poly adenylation






35. Read froma fixed starting point as a continous sequenecs of bases






36. UGA - UAG - UAA






37. Remain in G0 regenerate from stem cells






38. CCA AT 3 PRIME END






39. More than 1 codon may code for the same amino acid






40. Introns stay In the nucleus whereas EXons EXit and are EXpressed






41. Antigout - acts on mts






42. Site where RNA polymerase and multiple other transciption factors bind to DNA upstream from gene locus (AT rich upstream sequence with TATA and CAAT boxes)






43. AD and AR- associated iwth joint dislocation - berry aneurysms - organ rupture






44. Seals






45. Inhibits ribonucleotide reductase






46. P53 and RB normally inhibit g1 to S progression






47. Epithelial cells






48. H1






49. Must be both activated and inactivated for cell cycle to progress






50. Prevents stranges from reannealing