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






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






3. Binds 50S blocking translocation






4. 1P (blocked by tetracycline)






5. Aminoacyl - tRNA binds to A site 2) peptidyltransferase catalyzes peptide bond formation transfers growing polypeptie to amino acid in A site 3) ribosome advances 3 nucleotides toward the 3 prime end of RNA moving peptiydyl RNA to P site






6. Y shaped region along DNA template where leading and lagging strands are syntehsized






7. UGA - UAG - UAA






8. Different exons can be combined to make nique protiens in different times






9. Anit helminth - act on microtubules






10. CCA AT 3 PRIME END






11. Stretch of DNA that alters gene expression by binding transcription factors






12. Responsible for the accuracy of amino acid selection






13. Intervening noncoding segments of DNA






14. Never go to Go divide rapidly with short G1 bone marrow - gut epithelium - skin - hair follicles






15. Proline - glycine






16. Elastase






17. Base + ribose






18. Inhibit DNA gyrase (specific prokaryotic topoisomerase)






19. Epithelial cells






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






21. Particular sequnece in genomre where DNA replication begins. May be single (prokaryotes) or multiple (eukaryotes)






22. Type III






23. 1 RNA polymerase (multisubunite complex) makes all 3 kinds of RNA






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






25. Exocytose procollagen into extracellylar sace






26. Even 40S 60S =80S






27. Changed aaconservative - new aa is similar in chemical structure






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






29. HS1 - HSB - H2 - H4






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






31. 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






32. ATP- AMP (2 phosphoanhydride bonds)






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






34. Change resulting in early stop codon






35. Odd 30S plus 50 S=70S






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






37. Ribonucleotide reductase






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






39. GTP






40. Completed protein is released from ribosme through simple hydrolosis and dissociates






41. Nucleotide excision repair - Base Excision repair - Mismath repair






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






43. Alpha 1 antitrypisn






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






45. Unattached to any membrane; site of cytosolic and organeller prtoeins






46. H1 string






47. Greater melting temperature lower fluidity






48. Inhibits the atpase which increases intracellular sodium which increases intracellular calcium increases cardiaccontractility






49. Commonly results in dramatic decrease in amount of gene transcribed






50. Remain in G0 regenerate from stem cells