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GRE Biochemistry
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Subjects
:
gre
,
science
Instructions:
Answer 50 questions in 15 minutes.
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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. Repeated replication w/o cell division
Polytene chromosome
[B]=[A] - ratio = 1
3' terminal -OH
2D gel electrophoresis
2. Val - Leu - Ile - Ala - Met
cAMP
tyrosine kinase
Non Polar AAs
intermediate filiments
3. Can result in allele differences - suce as 3:1 and 1:3
gene conversion
microtubules
pyruvate dehydrogenase
epimers
4. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
centimorgans
eEF-1 and eEF-2
nondisjunction
microfiliments
5. Can undergo both lytic and lysogenic cycle
trypsin
phosphatase
cell plate
temperate bacteriophage
6. Gene has multiple effects
isocitrate dehydrogenase and a-ketogluterase
gene conversion
pleiotropic
Non Polar AAs
7. Enzymes in Krebs cycle that produce NADH
SRP - signal recognition particle
isocitrate dehydrogenase and a-ketogluterase
kb
biotin
8. Vitamin B1 - cofactor that aids in dehydrogenase mostly
Acetyl-CoA carboxylase
Thiamine Pyrophosphate (TPP)
Hfr bacteria
heterochromatin
9. Do not contain F factor
EF-G
F- bacteria
[B]=[A] - ratio = 1
nucleophile
10. 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
FAD and NADP ATP equivalents
epinephrine
VLDL
Pyridoxal-phosphate (PLP)
11. Recruits RecA protein - inhibited by LexA - results in mutagenesis
epinephrine
cAMP
biotin
SOS repair
12. Phe - Trp - Tyr - Gly - Pro
Steroid Hormones
phosphorolysis
3' terminal -OH
Aromatic/Achiral AAs
13. RNA protein-complex
trypsin
PFK1
SRP - signal recognition particle
pyruvate dehydrogenase
14. Irreversible reaction that require ATP first part of glycolosis
F+ bacteria
Hexokinase and PFK1
PEP carboxylase
mtDNA and chDNA
15. (His - Arg - Lys +) - (Glu - Asp -)
nondisjunction
heterochromatin
microfiliments
Charged AAs
16. When exons are arranged in multiple orders after removal of introns
kinase
[A][B]
F' (F-prime) bacteria
alternative splicing
17. Operon 1/2 - gene 1/6
isocitrate dehydrogenase and a-ketogluterase
aconitase
chance of in frame fusion for operon? and gene?
cAMP
18. Ser - Cys - Thr - Gln - Asn
Polar AAs
phosphorolysis
mtDNA and chDNA
trypsin
19. Cis faces the ER and trans faces the plasma membrane
Thiamine Pyrophosphate (TPP)
cis and trans golgi network
FAD and NADP ATP equivalents
F' (F-prime) bacteria
20. Gene duplication
pH
F' (F-prime) bacteria
F- bacteria
origin of multi gene families
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.
aconitase
Hfr bacteria
3' terminal -OH
[B]=[A] - ratio = 1
22. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
epimers
2 -4 DNP
F+ bacteria
alternative splicing
23. = pKa+ log(B/A) - -log(Ka)
alternative splicing
pH
Pyridoxal-phosphate (PLP)
[B]=[A] - ratio = 1
24. 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
temperate bacteriophage
centimorgans
[A][B]
25. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
euchromatin
F+ bacteria
intermediate filiments
Pyruvate carboxylase
26. Isoelectric point and MW
EF-G
2D gel electrophoresis
epimers
chymotrypsin
27. Enter cells freely
Steroid Hormones
3' terminal -OH
Aromatic/Achiral AAs
kb
28. Only one carbon center is changed
cofactors
F- bacteria
cis and trans golgi network
epimers
29. 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
SRP - signal recognition particle
Pyridoxal-phosphate (PLP)
mtDNA and chDNA
temperate bacteriophage
30. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
heterochromatin
intermediate filiments
origin of multi gene families
[B]=[A] - ratio = 1
31. Derived from golgi vesicles
2D gel electrophoresis
biotin
northern blot
cell plate
32. Failure of chromosome pairs to separate during meiosis
trypsin
nondisjunction
aconitase
gene conversion
33. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
Charged AAs
cofactors
cis and trans golgi network
tyrosine kinase
34. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
biotin
Thiamine Pyrophosphate (TPP)
[A][B]
F' (F-prime) bacteria
35. MRNA
Charged AAs
2 -4 DNP
northern blot
2D gel electrophoresis
36. 1e-14
centimorgans
SRP - signal recognition particle
pH
[A][B]
37. Neutralizes H2O2 - found in lysosomes
catalase
epinephrine
[A][B]
euchromatin
38. 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.
microfiliments
mitochondria
F+ bacteria
chymotrypsin
39. Makes Acetyl-CoA from pyruvate
euchromatin
pyruvate dehydrogenase
eEF-1 and eEF-2
microfiliments
40. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
Polytene chromosome
EF-G
intermediate filiments
Non Polar AAs
41. Circular and double stranded
tyrosine kinase
Polar AAs
mtDNA and chDNA
Pyridoxal-phosphate (PLP)
42. Triglycerides - cholesterols - and phospholipids
SRP - signal recognition particle
microfiliments
Charged AAs
VLDL
43. Contain their own DNA - mRNA - and proteins to synthesize more
mitochondria
2 -4 DNP
Charged AAs
F- bacteria
44. Measures physical base pair distance
kb
microfiliments
3' terminal -OH
Polytene chromosome
45. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
cofactors
pleiotropic
VLDL
alternative splicing
46. An enzyme that removes a phosphate group from its substrate
F' (F-prime) bacteria
centimorgans
heterochromatin
phosphatase
47. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
Thiamine Pyrophosphate (TPP)
Acetyl-CoA carboxylase
epinephrine
F' (F-prime) bacteria
48. FAD-2 - NADP-3
[A][B]
origin of multi gene families
FAD and NADP ATP equivalents
northern blot
49. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
VLDL
pyruvate dehydrogenase
2 -4 DNP
PEP carboxylase
50. Cleaves on C terminal side of lysine and arginine
trypsin
phosphorolysis
cAMP
Aromatic/Achiral AAs
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