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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. 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
F+ bacteria
FAD and NADP ATP equivalents
epinephrine
microtubules
2. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
Pyruvate carboxylase
PFK1
mtDNA and chDNA
F' (F-prime) bacteria
3. 1e-14
mitochondria
trypsin
PEP carboxylase
[A][B]
4. 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
microfiliments
VLDL
chymotrypsin
cAMP
5. 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.
phosphorolysis
microtubules
heterochromatin
Polytene chromosome
6. Recruits RecA protein - inhibited by LexA - results in mutagenesis
Polytene chromosome
northern blot
SOS repair
epimers
7. Do not contain F factor
F- bacteria
tyrosine kinase
Non Polar AAs
cell plate
8. 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 -
Hfr bacteria
catalase
kinase
chymotrypsin
9. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome
10. Vitamin B1 - cofactor that aids in dehydrogenase mostly
FAD and NADP ATP equivalents
Polytene chromosome
trypsin
Thiamine Pyrophosphate (TPP)
11. Contain their own DNA - mRNA - and proteins to synthesize more
Charged AAs
3' terminal -OH
PFK1
mitochondria
12. Cis faces the ER and trans faces the plasma membrane
kinase
cis and trans golgi network
PFK1
F- bacteria
13. Gene duplication
origin of multi gene families
Hfr bacteria
3' terminal -OH
Steroid Hormones
14. 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.
F+ bacteria
Polar AAs
pleiotropic
epimers
15. Enzymes in Krebs cycle that produce NADH
nondisjunction
PEP carboxykinase
Non Polar AAs
isocitrate dehydrogenase and a-ketogluterase
16. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
PFK2
FAD and NADP ATP equivalents
Pyruvate carboxylase
PEP carboxylase
17. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
biotin
Signal recognition particle (SRP)
PFK1
eEF-1 and eEF-2
18. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
[A][B]
cis and trans golgi network
Hexokinase and PFK1
biotin
19. An enzyme that removes a phosphate group from its substrate
phosphatase
mtDNA and chDNA
epinephrine
SRP - signal recognition particle
20. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
2D gel electrophoresis
euchromatin
Charged AAs
heterochromatin
21. MRNA
nondisjunction
northern blot
gene conversion
SRP - signal recognition particle
22. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
F- bacteria
catalase
Charged AAs
eEF-1 and eEF-2
23. Makes Acetyl-CoA from pyruvate
Signal recognition particle (SRP)
2 -4 DNP
biotin
pyruvate dehydrogenase
24. Triglycerides - cholesterols - and phospholipids
Aromatic/Achiral AAs
EF-G
VLDL
Polytene chromosome
25. (His - Arg - Lys +) - (Glu - Asp -)
northern blot
Charged AAs
tyrosine kinase
alternative splicing
26. Krebs cycle enzyme
2 -4 DNP
Hfr bacteria
Polar AAs
aconitase
27. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
epinephrine
2 -4 DNP
kb
PEP carboxykinase
28. = pKa+ log(B/A) - -log(Ka)
[A][B]
pH
VLDL
tyrosine kinase
29. Ser - Cys - Thr - Gln - Asn
kinase
Polar AAs
cAMP
Signal recognition particle (SRP)
30. Phe - Trp - Tyr - Gly - Pro
2 -4 DNP
Aromatic/Achiral AAs
Pyruvate carboxylase
Polytene chromosome
31. Actin - myosin - and other muscle proteins
alternative splicing
northern blot
aconitase
microfiliments
32. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
Hfr bacteria
PEP carboxylase
PEP carboxykinase
cofactors
33. Gene has multiple effects
cAMP
Non Polar AAs
pleiotropic
PEP carboxylase
34. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
euchromatin
PFK2
eEF-1 and eEF-2
PEP carboxylase
35. Serine protease that cleaves on c terminal side of aromatics
cofactors
[B]=[A] - ratio = 1
chymotrypsin
Hfr bacteria
36. Donates electrons to form a bond such as N in amines and O in alcohols
gene conversion
[B]=[A] - ratio = 1
nucleophile
[A][B]
37. Isoelectric point and MW
isocitrate dehydrogenase and a-ketogluterase
Thiamine Pyrophosphate (TPP)
kb
2D gel electrophoresis
38. Can undergo both lytic and lysogenic cycle
pleiotropic
temperate bacteriophage
Hexokinase and PFK1
Pyruvate carboxylase
39. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
kinase
pH
centimorgans
Charged AAs
40. 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.
Hfr bacteria
Acetyl-CoA carboxylase
epinephrine
intermediate filiments
41. PKa = pH
2D gel electrophoresis
euchromatin
centimorgans
[B]=[A] - ratio = 1
42. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
intermediate filiments
tyrosine kinase
Acetyl-CoA carboxylase
cell plate
43. Can serve as a primer
44. Cleaves on C terminal side of lysine and arginine
Non Polar AAs
chymotrypsin
trypsin
pleiotropic
45. Measures physical base pair distance
kb
microtubules
heterochromatin
Acetyl-CoA carboxylase
46. Val - Leu - Ile - Ala - Met
Steroid Hormones
3' terminal -OH
Non Polar AAs
SRP - signal recognition particle
47. Can result in allele differences - suce as 3:1 and 1:3
nondisjunction
gene conversion
tyrosine kinase
Pyruvate carboxylase
48. Derived from golgi vesicles
SOS repair
cAMP
cell plate
chance of in frame fusion for operon? and gene?
49. Neutralizes H2O2 - found in lysosomes
PEP carboxylase
kb
catalase
PFK1
50. RNA protein-complex
SRP - signal recognition particle
nucleophile
F+ bacteria
origin of multi gene families