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GRE Biochemistry

Subjects : gre, science
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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. Recruits RecA protein - inhibited by LexA - results in mutagenesis

2. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes

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

4. 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

5. 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.

6. Measures physical base pair distance

7. Vitamin B1 - cofactor that aids in dehydrogenase mostly

8. Derived from golgi vesicles

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

10. Triglycerides - cholesterols - and phospholipids

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

12. PKa = pH

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

14. Irreversible reaction that require ATP first part of glycolosis

15. Do not contain F factor

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

17. Can undergo both lytic and lysogenic cycle

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

19. FAD-2 - NADP-3

20. 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.

21. Val - Leu - Ile - Ala - Met

22. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity

23. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.

24. Gene has multiple effects

25. Gprotein association - exchanges GDP to GTP - converts AMP into cyclic AMP. Cyclic AMP binds to protein kinase A: Protein kinase A phosphorylates phosphorylase kinase. increases Ca which binds calmodulin proteins which then binds to phosphorylase kin

26. RNA protein-complex

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

28. 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 -

29. Operon 1/2 - gene 1/6

30. Only one carbon center is changed

31. Circular and double stranded

32. 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

33. Makes Acetyl-CoA from pyruvate

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

35. 1e-14

36. Gene duplication

37. Cleaves on C terminal side of lysine and arginine

38. Can serve as a primer

39. Actin - myosin - and other muscle proteins

40. Phe - Trp - Tyr - Gly - Pro

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

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

43. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis

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

45. An enzyme that removes a phosphate group from its substrate

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

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

48. Krebs cycle enzyme

49. MRNA

50. Neutralizes H2O2 - found in lysosomes