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

3. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.

4. Makes Acetyl-CoA from pyruvate

5. Measures physical base pair distance

6. RNA protein-complex

7. Val - Leu - Ile - Ala - Met

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

9. Can undergo both lytic and lysogenic cycle

10. Do not contain F factor

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

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

13. 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 -

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

15. Enter cells freely

16. Cleaves on C terminal side of lysine and arginine

17. 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

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

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

20. Actin - myosin - and other muscle proteins

21. Vitamin B1 - cofactor that aids in dehydrogenase mostly

22. Enzymes in Krebs cycle that produce NADH

23. Derived from golgi vesicles

24. Circular and double stranded

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

26. 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

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

28. Ser - Cys - Thr - Gln - Asn

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

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

31. Can serve as a primer

32. Neutralizes H2O2 - found in lysosomes

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

34. Phe - Trp - Tyr - Gly - Pro

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

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

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

38. PKa = pH

39. Only one carbon center is changed

40. Operon 1/2 - gene 1/6

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

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

43. Irreversible reaction that require ATP first part of glycolosis

44. Repeated replication w/o cell division

45. Krebs cycle enzyme

46. 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

47. Gene has multiple effects

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

49. 1e-14

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