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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. Isoelectric point and MW
catalase
pyruvate dehydrogenase
2D gel electrophoresis
F- bacteria
2. 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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3. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
tyrosine kinase
chymotrypsin
phosphatase
Acetyl-CoA carboxylase
4. Vitamin B1 - cofactor that aids in dehydrogenase mostly
2D gel electrophoresis
pH
Thiamine Pyrophosphate (TPP)
Steroid Hormones
5. Operon 1/2 - gene 1/6
aconitase
Pyruvate carboxylase
Charged AAs
chance of in frame fusion for operon? and gene?
6. Irreversible reaction that require ATP first part of glycolosis
biotin
phosphatase
Hexokinase and PFK1
phosphorolysis
7. PKa = pH
epimers
pH
intermediate filiments
[B]=[A] - ratio = 1
8. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
alternative splicing
centimorgans
nondisjunction
Pyridoxal-phosphate (PLP)
9. 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.
kinase
phosphorolysis
pH
2 -4 DNP
10. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
eEF-1 and eEF-2
microfiliments
[B]=[A] - ratio = 1
catalase
11. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
chance of in frame fusion for operon? and gene?
F+ bacteria
Acetyl-CoA carboxylase
cell plate
12. MRNA
biotin
epimers
microfiliments
northern blot
13. Cleaves on C terminal side of lysine and arginine
F+ bacteria
kinase
Thiamine Pyrophosphate (TPP)
trypsin
14. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
aconitase
cofactors
catalase
gene conversion
15. Neutralizes H2O2 - found in lysosomes
intermediate filiments
isocitrate dehydrogenase and a-ketogluterase
Signal recognition particle (SRP)
catalase
16. 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
pyruvate dehydrogenase
microtubules
EF-G
17. 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
Aromatic/Achiral AAs
epimers
2 -4 DNP
epinephrine
18. Derived from golgi vesicles
cell plate
eEF-1 and eEF-2
aconitase
EF-G
19. Can serve as a primer
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20. 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.
2 -4 DNP
F- bacteria
FAD and NADP ATP equivalents
F+ bacteria
21. Contain their own DNA - mRNA - and proteins to synthesize more
Thiamine Pyrophosphate (TPP)
mitochondria
nucleophile
cis and trans golgi network
22. Recruits RecA protein - inhibited by LexA - results in mutagenesis
Acetyl-CoA carboxylase
SOS repair
catalase
Charged AAs
23. 1e-14
PFK1
heterochromatin
[A][B]
cell plate
24. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
origin of multi gene families
pH
Pyridoxal-phosphate (PLP)
heterochromatin
25. Failure of chromosome pairs to separate during meiosis
mtDNA and chDNA
cAMP
nondisjunction
Pyruvate carboxylase
26. Triglycerides - cholesterols - and phospholipids
kb
Pyridoxal-phosphate (PLP)
Thiamine Pyrophosphate (TPP)
VLDL
27. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
phosphorolysis
Hexokinase and PFK1
chymotrypsin
Pyruvate carboxylase
28. (His - Arg - Lys +) - (Glu - Asp -)
centimorgans
epinephrine
intermediate filiments
Charged AAs
29. Enzymes in Krebs cycle that produce NADH
kb
isocitrate dehydrogenase and a-ketogluterase
catalase
mtDNA and chDNA
30. Actin - myosin - and other muscle proteins
Non Polar AAs
nondisjunction
isocitrate dehydrogenase and a-ketogluterase
microfiliments
31. Val - Leu - Ile - Ala - Met
[B]=[A] - ratio = 1
Non Polar AAs
Polytene chromosome
Polar AAs
32. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
nondisjunction
Pyridoxal-phosphate (PLP)
euchromatin
alternative splicing
33. Can undergo both lytic and lysogenic cycle
temperate bacteriophage
[B]=[A] - ratio = 1
Hfr bacteria
cell plate
34. 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 -
F' (F-prime) bacteria
cell plate
kinase
VLDL
35. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
origin of multi gene families
biotin
Non Polar AAs
[B]=[A] - ratio = 1
36. Donates electrons to form a bond such as N in amines and O in alcohols
Polytene chromosome
Hfr bacteria
nucleophile
eEF-1 and eEF-2
37. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
EF-G
PEP carboxykinase
biotin
kb
38. 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
Pyruvate carboxylase
Pyridoxal-phosphate (PLP)
SRP - signal recognition particle
Thiamine Pyrophosphate (TPP)
39. Gene duplication
Polar AAs
origin of multi gene families
epimers
epinephrine
40. Makes Acetyl-CoA from pyruvate
alternative splicing
Acetyl-CoA carboxylase
centimorgans
pyruvate dehydrogenase
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
SOS repair
VLDL
PFK1
origin of multi gene families
42. 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.
temperate bacteriophage
nucleophile
Hfr bacteria
Steroid Hormones
43. Nuclear lamins - desmins - keratins - internexins (structure)
tyrosine kinase
intermediate filiments
SOS repair
temperate bacteriophage
44. Ser - Cys - Thr - Gln - Asn
phosphorolysis
Polar AAs
eEF-1 and eEF-2
PFK1
45. = pKa+ log(B/A) - -log(Ka)
cAMP
epimers
F+ bacteria
pH
46. When exons are arranged in multiple orders after removal of introns
euchromatin
nondisjunction
nucleophile
alternative splicing
47. Dynins and kinesins (movement) - cilia and flagella
Pyridoxal-phosphate (PLP)
microtubules
VLDL
F- bacteria
48. Krebs cycle enzyme
eEF-1 and eEF-2
Non Polar AAs
pleiotropic
aconitase
49. FAD-2 - NADP-3
[B]=[A] - ratio = 1
FAD and NADP ATP equivalents
Signal recognition particle (SRP)
Aromatic/Achiral AAs
50. Repeated replication w/o cell division
microtubules
cofactors
Polytene chromosome
Polar AAs