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Test your basic knowledge |
GRE Biochemistry
Start Test
Study First
Subjects
:
gre
,
science
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
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. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
PEP carboxylase
alternative splicing
Charged AAs
biotin
2. 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
pyruvate dehydrogenase
Hfr bacteria
PFK1
northern blot
3. Repeated replication w/o cell division
cell plate
Polytene chromosome
trypsin
Signal recognition particle (SRP)
4. Operon 1/2 - gene 1/6
3' terminal -OH
PEP carboxylase
centimorgans
chance of in frame fusion for operon? and gene?
5. Failure of chromosome pairs to separate during meiosis
intermediate filiments
epinephrine
EF-G
nondisjunction
6. 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.
catalase
northern blot
phosphorolysis
3' terminal -OH
7. Phe - Trp - Tyr - Gly - Pro
aconitase
Aromatic/Achiral AAs
Polar AAs
kb
8. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
mtDNA and chDNA
intermediate filiments
euchromatin
microfiliments
9. Gene has multiple effects
aconitase
tyrosine kinase
pleiotropic
cAMP
10. Ser - Cys - Thr - Gln - Asn
Steroid Hormones
Thiamine Pyrophosphate (TPP)
Polar AAs
pyruvate dehydrogenase
11. Donates electrons to form a bond such as N in amines and O in alcohols
trypsin
nucleophile
kinase
intermediate filiments
12. Krebs cycle enzyme
heterochromatin
F+ bacteria
EF-G
aconitase
13. Derived from golgi vesicles
phosphorolysis
cell plate
northern blot
origin of multi gene families
14. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
tyrosine kinase
biotin
Thiamine Pyrophosphate (TPP)
Hexokinase and PFK1
15. Isoelectric point and MW
cell plate
epimers
F- bacteria
2D gel electrophoresis
16. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
Pyruvate carboxylase
Steroid Hormones
heterochromatin
biotin
17. Recruits RecA protein - inhibited by LexA - results in mutagenesis
microfiliments
gene conversion
SOS repair
Pyruvate carboxylase
18. Val - Leu - Ile - Ala - Met
Non Polar AAs
pH
cAMP
[A][B]
19. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
EF-G
northern blot
Pyridoxal-phosphate (PLP)
cofactors
20. Can serve as a primer
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21. 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.
pleiotropic
nondisjunction
3' terminal -OH
Hfr bacteria
22. RNA protein-complex
centimorgans
nucleophile
SRP - signal recognition particle
PFK2
23. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
2 -4 DNP
pH
trypsin
Hfr bacteria
24. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
Signal recognition particle (SRP)
Acetyl-CoA carboxylase
biotin
Aromatic/Achiral AAs
25. Nuclear lamins - desmins - keratins - internexins (structure)
intermediate filiments
cell plate
Thiamine Pyrophosphate (TPP)
Signal recognition particle (SRP)
26. MRNA
F' (F-prime) bacteria
phosphatase
PEP carboxylase
northern blot
27. Measures physical base pair distance
kb
pleiotropic
trypsin
intermediate filiments
28. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
PEP carboxykinase
Pyridoxal-phosphate (PLP)
eEF-1 and eEF-2
epimers
29. Circular and double stranded
Signal recognition particle (SRP)
nondisjunction
mtDNA and chDNA
PFK2
30. Enzymes in Krebs cycle that produce NADH
F+ bacteria
isocitrate dehydrogenase and a-ketogluterase
mtDNA and chDNA
SRP - signal recognition particle
31. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
Pyruvate carboxylase
kb
Signal recognition particle (SRP)
PEP carboxykinase
32. Serine protease that cleaves on c terminal side of aromatics
epimers
Pyruvate carboxylase
2D gel electrophoresis
chymotrypsin
33. Triglycerides - cholesterols - and phospholipids
VLDL
pleiotropic
euchromatin
cofactors
34. Vitamin B1 - cofactor that aids in dehydrogenase mostly
Thiamine Pyrophosphate (TPP)
SOS repair
F+ bacteria
[A][B]
35. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
eEF-1 and eEF-2
VLDL
mitochondria
kinase
36. Enter cells freely
centimorgans
pleiotropic
epimers
Steroid Hormones
37. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
EF-G
PEP carboxylase
pleiotropic
Steroid Hormones
38. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
Non Polar AAs
cofactors
Acetyl-CoA carboxylase
mitochondria
39. 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
trypsin
chymotrypsin
cAMP
pyruvate dehydrogenase
40. Contain their own DNA - mRNA - and proteins to synthesize more
VLDL
mtDNA and chDNA
mitochondria
northern blot
41. 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.
F+ bacteria
Pyruvate carboxylase
PEP carboxykinase
Hexokinase and PFK1
42. Gene duplication
origin of multi gene families
euchromatin
Hexokinase and PFK1
PEP carboxykinase
43. 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
Polytene chromosome
cAMP
epinephrine
PFK2
44. = pKa+ log(B/A) - -log(Ka)
[A][B]
pH
microfiliments
pyruvate dehydrogenase
45. When exons are arranged in multiple orders after removal of introns
alternative splicing
pH
nondisjunction
VLDL
46. 1e-14
euchromatin
[A][B]
kinase
Thiamine Pyrophosphate (TPP)
47. PKa = pH
microtubules
temperate bacteriophage
[B]=[A] - ratio = 1
alternative splicing
48. FAD-2 - NADP-3
FAD and NADP ATP equivalents
2D gel electrophoresis
Polytene chromosome
Acetyl-CoA carboxylase
49. Cleaves on C terminal side of lysine and arginine
eEF-1 and eEF-2
trypsin
SOS repair
tyrosine kinase
50. An enzyme that removes a phosphate group from its substrate
Signal recognition particle (SRP)
FAD and NADP ATP equivalents
phosphatase
northern blot