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

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

3. PKa = pH

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

5. Can undergo both lytic and lysogenic cycle

6. Val - Leu - Ile - Ala - Met

7. Enzymes in Krebs cycle that produce NADH

8. Measures physical base pair distance

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

10. Irreversible reaction that require ATP first part of glycolosis

11. Vitamin B1 - cofactor that aids in dehydrogenase mostly

12. Gene has multiple effects

13. Can serve as a primer

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

15. Enter cells freely

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

17. Cleaves on C terminal side of lysine and arginine

18. Makes Acetyl-CoA from pyruvate

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

20. RNA protein-complex

21. MRNA

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

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

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

25. Gene duplication

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

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

28. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).

29. 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

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

31. 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 -

32. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.

33. Neutralizes H2O2 - found in lysosomes

34. Triglycerides - cholesterols - and phospholipids

35. Actin - myosin - and other muscle proteins

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

37. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high

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

39. Isoelectric point and MW

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

41. Repeated replication w/o cell division

42. Preferable to hydrolysis (like in the breakdown of glycogen or starch - as in the example above) because glucose 1-phosphate yields more ATP than does free glucose when subsequently catabolized to pyruvate.

43. FAD-2 - NADP-3

44. Recruits RecA protein - inhibited by LexA - results in mutagenesis

45. 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.

46. Ser - Cys - Thr - Gln - Asn

47. Do not contain F factor

48. 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.

49. Krebs cycle enzyme

50. Only one carbon center is changed