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