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Test your basic knowledge |
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. Irreversible reaction that require ATP first part of glycolosis
cell plate
pleiotropic
Hexokinase and PFK1
SRP - signal recognition particle
2. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
epinephrine
Aromatic/Achiral AAs
Steroid Hormones
euchromatin
3. Ser - Cys - Thr - Gln - Asn
epinephrine
gene conversion
chymotrypsin
Polar AAs
4. Nuclear lamins - desmins - keratins - internexins (structure)
intermediate filiments
nucleophile
Hfr bacteria
Charged AAs
5. Do not contain F factor
F- bacteria
cell plate
Steroid Hormones
Hexokinase and PFK1
6. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
Aromatic/Achiral AAs
EF-G
temperate bacteriophage
isocitrate dehydrogenase and a-ketogluterase
7. Cleaves on C terminal side of lysine and arginine
cis and trans golgi network
Signal recognition particle (SRP)
trypsin
Hfr bacteria
8. Repeated replication w/o cell division
Charged AAs
F+ bacteria
Polytene chromosome
FAD and NADP ATP equivalents
9. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
epimers
trypsin
PFK2
2 -4 DNP
10. Neutralizes H2O2 - found in lysosomes
mtDNA and chDNA
Non Polar AAs
catalase
trypsin
11. Contain their own DNA - mRNA - and proteins to synthesize more
tyrosine kinase
Polytene chromosome
mitochondria
Aromatic/Achiral AAs
12. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
tyrosine kinase
phosphorolysis
[A][B]
cAMP
13. 1e-14
F+ bacteria
[A][B]
centimorgans
Aromatic/Achiral AAs
14. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
nucleophile
chance of in frame fusion for operon? and gene?
Acetyl-CoA carboxylase
Steroid Hormones
15. 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 -
[A][B]
kinase
origin of multi gene families
PEP carboxykinase
16. RNA protein-complex
SOS repair
heterochromatin
SRP - signal recognition particle
Steroid Hormones
17. Measures physical base pair distance
FAD and NADP ATP equivalents
SRP - signal recognition particle
kb
pyruvate dehydrogenase
18. Dynins and kinesins (movement) - cilia and flagella
chymotrypsin
F' (F-prime) bacteria
epinephrine
microtubules
19. Circular and double stranded
pH
mtDNA and chDNA
EF-G
gene conversion
20. Makes Acetyl-CoA from pyruvate
pyruvate dehydrogenase
[B]=[A] - ratio = 1
SRP - signal recognition particle
epinephrine
21. MRNA
kb
heterochromatin
northern blot
cis and trans golgi network
22. 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
Charged AAs
mtDNA and chDNA
PFK1
phosphatase
23. When exons are arranged in multiple orders after removal of introns
alternative splicing
mitochondria
Pyruvate carboxylase
isocitrate dehydrogenase and a-ketogluterase
24. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
Aromatic/Achiral AAs
biotin
3' terminal -OH
epinephrine
25. Operon 1/2 - gene 1/6
Non Polar AAs
pyruvate dehydrogenase
chance of in frame fusion for operon? and gene?
SOS repair
26. 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.
epimers
Hfr bacteria
cAMP
PEP carboxykinase
27. PKa = pH
[B]=[A] - ratio = 1
Non Polar AAs
cis and trans golgi network
eEF-1 and eEF-2
28. Can result in allele differences - suce as 3:1 and 1:3
isocitrate dehydrogenase and a-ketogluterase
3' terminal -OH
cis and trans golgi network
gene conversion
29. Triglycerides - cholesterols - and phospholipids
trypsin
VLDL
gene conversion
F- bacteria
30. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
2 -4 DNP
EF-G
phosphorolysis
PEP carboxykinase
31. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
cell plate
mtDNA and chDNA
eEF-1 and eEF-2
VLDL
32. Only one carbon center is changed
cis and trans golgi network
epimers
[A][B]
biotin
33. Enter cells freely
Polytene chromosome
Steroid Hormones
Polar AAs
aconitase
34. Phe - Trp - Tyr - Gly - Pro
Aromatic/Achiral AAs
3' terminal -OH
origin of multi gene families
F' (F-prime) bacteria
35. 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
[B]=[A] - ratio = 1
gene conversion
eEF-1 and eEF-2
cAMP
36. (His - Arg - Lys +) - (Glu - Asp -)
epinephrine
Charged AAs
[B]=[A] - ratio = 1
PFK1
37. 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
catalase
2D gel electrophoresis
[B]=[A] - ratio = 1
Pyridoxal-phosphate (PLP)
38. Gene duplication
Hfr bacteria
origin of multi gene families
VLDL
centimorgans
39. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
Pyruvate carboxylase
SOS repair
Polar AAs
biotin
40. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
SOS repair
Acetyl-CoA carboxylase
Signal recognition particle (SRP)
FAD and NADP ATP equivalents
41. Actin - myosin - and other muscle proteins
microfiliments
Steroid Hormones
epimers
SOS repair
42. Derived from golgi vesicles
cell plate
pyruvate dehydrogenase
SRP - signal recognition particle
SOS repair
43. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
PEP carboxykinase
phosphatase
heterochromatin
Pyridoxal-phosphate (PLP)
44. Krebs cycle enzyme
Charged AAs
Pyruvate carboxylase
Polytene chromosome
aconitase
45. Cis faces the ER and trans faces the plasma membrane
cis and trans golgi network
phosphatase
heterochromatin
FAD and NADP ATP equivalents
46. 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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47. Can undergo both lytic and lysogenic cycle
Polar AAs
temperate bacteriophage
PFK2
PEP carboxykinase
48. 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.
PFK2
origin of multi gene families
2D gel electrophoresis
phosphorolysis
49. Val - Leu - Ile - Ala - Met
Non Polar AAs
epinephrine
pH
cis and trans golgi network
50. FAD-2 - NADP-3
trypsin
nondisjunction
FAD and NADP ATP equivalents
VLDL
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