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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. 1e-14
PEP carboxykinase
Non Polar AAs
[A][B]
PFK2
2. Circular and double stranded
pleiotropic
microtubules
Hfr bacteria
mtDNA and chDNA
3. FAD-2 - NADP-3
FAD and NADP ATP equivalents
epinephrine
cis and trans golgi network
gene conversion
4. Vitamin B1 - cofactor that aids in dehydrogenase mostly
cell plate
Thiamine Pyrophosphate (TPP)
Steroid Hormones
isocitrate dehydrogenase and a-ketogluterase
5. 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
aconitase
Pyridoxal-phosphate (PLP)
[A][B]
PFK1
6. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
PEP carboxylase
PFK2
Pyruvate carboxylase
F+ bacteria
7. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
eEF-1 and eEF-2
euchromatin
SOS repair
tyrosine kinase
8. PKa = pH
VLDL
[B]=[A] - ratio = 1
pyruvate dehydrogenase
SOS repair
9. 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
catalase
epinephrine
[A][B]
cell plate
10. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
centimorgans
F+ bacteria
nucleophile
heterochromatin
11. 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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12. = pKa+ log(B/A) - -log(Ka)
EF-G
cis and trans golgi network
pH
3' terminal -OH
13. Gene has multiple effects
phosphatase
epinephrine
catalase
pleiotropic
14. (His - Arg - Lys +) - (Glu - Asp -)
kinase
alternative splicing
Charged AAs
cell plate
15. Cleaves on C terminal side of lysine and arginine
euchromatin
pH
PFK2
trypsin
16. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
Charged AAs
microtubules
VLDL
biotin
17. Donates electrons to form a bond such as N in amines and O in alcohols
nucleophile
PEP carboxylase
Pyridoxal-phosphate (PLP)
pyruvate dehydrogenase
18. When exons are arranged in multiple orders after removal of introns
chymotrypsin
phosphorolysis
alternative splicing
mtDNA and chDNA
19. Operon 1/2 - gene 1/6
cofactors
chance of in frame fusion for operon? and gene?
gene conversion
PFK1
20. Can result in allele differences - suce as 3:1 and 1:3
centimorgans
gene conversion
chymotrypsin
Polytene chromosome
21. Cis faces the ER and trans faces the plasma membrane
centimorgans
isocitrate dehydrogenase and a-ketogluterase
Pyridoxal-phosphate (PLP)
cis and trans golgi network
22. 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 -
Thiamine Pyrophosphate (TPP)
cell plate
kinase
microfiliments
23. Only one carbon center is changed
PFK1
SRP - signal recognition particle
epimers
biotin
24. An enzyme that removes a phosphate group from its substrate
kb
phosphatase
chance of in frame fusion for operon? and gene?
Pyruvate carboxylase
25. Enzymes in Krebs cycle that produce NADH
cofactors
phosphatase
isocitrate dehydrogenase and a-ketogluterase
Acetyl-CoA carboxylase
26. Do not contain F factor
Hexokinase and PFK1
F- bacteria
phosphorolysis
kb
27. Dynins and kinesins (movement) - cilia and flagella
euchromatin
heterochromatin
Non Polar AAs
microtubules
28. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
PEP carboxykinase
SRP - signal recognition particle
2D gel electrophoresis
tyrosine kinase
29. Irreversible reaction that require ATP first part of glycolosis
Hexokinase and PFK1
mtDNA and chDNA
isocitrate dehydrogenase and a-ketogluterase
nucleophile
30. RNA protein-complex
alternative splicing
biotin
SRP - signal recognition particle
PFK1
31. Val - Leu - Ile - Ala - Met
SRP - signal recognition particle
Non Polar AAs
PFK2
Steroid Hormones
32. 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.
euchromatin
origin of multi gene families
F+ bacteria
cAMP
33. Can serve as a primer
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34. Measures physical base pair distance
Polytene chromosome
3' terminal -OH
kb
aconitase
35. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
centimorgans
PFK1
pleiotropic
cis and trans golgi network
36. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
Polytene chromosome
intermediate filiments
aconitase
2 -4 DNP
37. Failure of chromosome pairs to separate during meiosis
Acetyl-CoA carboxylase
Aromatic/Achiral AAs
nondisjunction
intermediate filiments
38. Phe - Trp - Tyr - Gly - Pro
Aromatic/Achiral AAs
Charged AAs
3' terminal -OH
PEP carboxykinase
39. Can undergo both lytic and lysogenic cycle
pyruvate dehydrogenase
mitochondria
temperate bacteriophage
2 -4 DNP
40. Krebs cycle enzyme
F' (F-prime) bacteria
northern blot
Charged AAs
aconitase
41. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
3' terminal -OH
cofactors
Steroid Hormones
PFK1
42. 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
trypsin
Hexokinase and PFK1
cAMP
Pyridoxal-phosphate (PLP)
43. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
2D gel electrophoresis
Steroid Hormones
PEP carboxykinase
F+ bacteria
44. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
heterochromatin
[A][B]
kb
euchromatin
45. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
EF-G
Aromatic/Achiral AAs
microfiliments
isocitrate dehydrogenase and a-ketogluterase
46. Gene duplication
F' (F-prime) bacteria
biotin
origin of multi gene families
Pyruvate carboxylase
47. Triglycerides - cholesterols - and phospholipids
Hfr bacteria
VLDL
pyruvate dehydrogenase
2D gel electrophoresis
48. Repeated replication w/o cell division
Polar AAs
[A][B]
Polytene chromosome
Signal recognition particle (SRP)
49. Serine protease that cleaves on c terminal side of aromatics
Thiamine Pyrophosphate (TPP)
2 -4 DNP
chymotrypsin
[A][B]
50. 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.
cis and trans golgi network
phosphorolysis
origin of multi gene families
tyrosine kinase