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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. Elastase






2. Uracil






3. Prophas - metaphase - anaphase telophase






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






5. H1 string






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






7. Anterograde to microtubule






8. RNA polymerase I makes rRNA - RNA pol II makes mRNA - RNA pol III makes tRNA






9. Bm - kidney - ears and eyes






10. 9+2 arrangement of microtubules -






11. Specific endonucleases release the oligonucleotide containing damaged bases. DNA polymerase and logase fill and resealt eh gap






12. Neurons






13. Prevents stranges from reannealing






14. Splicing out of introns






15. Site where negative regulators bind






16. 75-90 nucleotides - 2ary structure cloverleaf form anticodon end is opposite 3 prime aminoacyl end






17. Rampant - Massive - TIny rRNA is most common - then mRNA and then tRNA






18. Proline - glycine






19. A malfunction of mismatch repair (MUt L etc..)






20. Three amino acids necessary for purine synthesis= glutamine - aspartate and glycine






21. Negatively charged DNA loops twice around histone octamers create a nucloesome bead.






22. The 3 prime hydroxyl of the nascent chain is the target






23. P53 and RB normally inhibit g1 to S progression






24. 5 prime to 3 prime






25. Cylindrical structure composed of helical array of plymerized dimers of alpha and beta tubulin - flagella - cilia - mitotic spindle - grows slowly collapses quickly






26. Checkpoints control transition between phases of cell cycle. regulated by cyclins - CDKs and tumor suppressors. Mitosis (shortest phse)






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






28. Inhibits ribonucleotide reductase






29. Muscle






30. Capping on 5 prime end (7 methylguanosine) -






31. G1 - S - G2 - Mitosis






32. 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






33. Scrutinizes aa before and after it binds to tRNA. If incorrect bond is hydrolyzed.






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






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






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






37. MRNA






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






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






40. Methyl THYmine has a meTHYl






41. Same aa often base change in 3rd position of codon






42. Bind 50S blocking translocation






43. Vimentin - desmin - cytockeratin - glial fibrillary acid proteins - neurofilaments






44. Change resulting in misreading of all nucleotides downstream - usually resulting in a truncated non functional protien






45. Regulatory proteins that control cell cycle events; phase specific; activated CDKs






46. 1 RNA polymerase (multisubunite complex) makes all 3 kinds of RNA






47. Each codon specifies only 1 amino acid






48. Create a nick in the helix to relieve supercoils created during replication






49. Inhibits dihydrofolate reductase down thymine






50. Attachment of ubiquitin to defective proteinds to tag them for breakdown