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GRE Biochemistry

Subjects : gre, science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. Possess F factor as a plasmid independent of the bacterial genome. The F plasmid contains only F factor DNA and no DNA from the bacterial genome.






2. Do not contain F factor






3. PKa = pH






4. Neutralizes H2O2 - found in lysosomes






5. Vitamin B1 - cofactor that aids in dehydrogenase mostly






6. Measures physical base pair distance






7. Failure of chromosome pairs to separate during meiosis






8. Actin - myosin - and other muscle proteins






9. Nuclear lamins - desmins - keratins - internexins (structure)






10. Val - Leu - Ile - Ala - Met






11. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.






12. Donates electrons to form a bond such as N in amines and O in alcohols






13. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate






14. Isoelectric point and MW






15. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome


16. MRNA






17. Possess F factor integrated into the bacterial genome. After integration into the host chromosomal DNA - these plasmids possess portions of - or entire - F factor and portions of the bacterial genome.






18. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated






19. When exons are arranged in multiple orders after removal of introns






20. Acts as a coenzyme in all transamination reactions - and in some decarboxylation and deamination reactions of amino acids. The aldehyde group of PLP forms a Schiff-base linkage (internal aldimine) with the e-amino group of a specific lysine group of






21. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades






22. Dynins and kinesins (movement) - cilia and flagella






23. Cis faces the ER and trans faces the plasma membrane






24. 1e-14






25. Enter cells freely






26. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)






27. Triglycerides - cholesterols - and phospholipids






28. Can undergo both lytic and lysogenic cycle






29. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA






30. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation






31. Derived from golgi vesicles






32. Makes Acetyl-CoA from pyruvate






33. Secondary messenger - used for intracellular signal transduction - such as transferring the effects of hormones like glucagon and adrenaline - which cannot pass through the cell membrane. It is involved in the activation of protein kinases and regula






34. Repeated replication w/o cell division






35. Gene has multiple effects






36. Contain their own DNA - mRNA - and proteins to synthesize more






37. Phosphotransferase - is a type of enzyme that transfers phosphate groups from high-energy donor molecules - such as ATP -[2] to specific substrates. The process is referred to as phosphorylation -






38. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes






39. The most important regulatory enzyme of glycolysis. It is an allosteric enzyme made of 4 subunits and controlled by many activators and inhibitors. PFK-1 catalyzes the important 'committed' step of glycolysis - the conversion of fructose 6-phosphate






40. Operon 1/2 - gene 1/6






41. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes






42. Gene duplication






43. RNA protein-complex






44. Can result in allele differences - suce as 3:1 and 1:3






45. = pKa+ log(B/A) - -log(Ka)






46. (His - Arg - Lys +) - (Glu - Asp -)






47. Only one carbon center is changed






48. Can serve as a primer


49. Phe - Trp - Tyr - Gly - Pro






50. Serine protease that cleaves on c terminal side of aromatics