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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.
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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. Ser - Cys - Thr - Gln - Asn






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






3. Do not contain F factor






4. Makes Acetyl-CoA from pyruvate






5. 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






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






7. Phe - Trp - Tyr - Gly - Pro






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






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






10. Can undergo both lytic and lysogenic cycle






11. Circular and double stranded






12. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






13. 1e-14






14. 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 -






15. MRNA






16. Triglycerides - cholesterols - and phospholipids






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






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






19. Irreversible reaction that require ATP first part of glycolosis






20. Krebs cycle enzyme






21. Isoelectric point and MW






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






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






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






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






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






27. Gene has multiple effects






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






29. RNA protein-complex






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






31. Cleaves on C terminal side of lysine and arginine






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






34. Repeated replication w/o cell division






35. Gene duplication






36. Measures physical base pair distance






37. FAD-2 - NADP-3






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






39. PKa = pH






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






41. 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






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






43. Neutralizes H2O2 - found in lysosomes






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

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45. Enzymes in Krebs cycle that produce NADH






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






47. Actin - myosin - and other muscle proteins






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. Failure of chromosome pairs to separate during meiosis






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