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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. Enter cells freely






2. Gene duplication






3. 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.






4. 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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5. Val - Leu - Ile - Ala - Met






6. Can undergo both lytic and lysogenic cycle






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






8. 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






9. RNA protein-complex






10. Do not contain F factor






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






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






13. Irreversible reaction that require ATP first part of glycolosis






14. 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






15. Neutralizes H2O2 - found in lysosomes






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






17. Can serve as a primer

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






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






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






21. Phe - Trp - Tyr - Gly - Pro






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






23. Vitamin B1 - cofactor that aids in dehydrogenase mostly






24. 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.






25. Measures physical base pair distance






26. Cleaves on C terminal side of lysine and arginine






27. 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






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






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






30. Isoelectric point and MW






31. Only one carbon center is changed






32. Triglycerides - cholesterols - and phospholipids






33. MRNA






34. Makes Acetyl-CoA from pyruvate






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






36. Actin - myosin - and other muscle proteins






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






38. Ser - Cys - Thr - Gln - Asn






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






40. Enzymes in Krebs cycle that produce NADH






41. Gene has multiple effects






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






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






44. FAD-2 - NADP-3






45. Derived from golgi vesicles






46. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.






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






48. Circular and double stranded






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






50. 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 -







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