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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. Measures physical base pair distance
kb
SRP - signal recognition particle
Signal recognition particle (SRP)
phosphorolysis
2. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
Pyruvate carboxylase
3' terminal -OH
2 -4 DNP
mitochondria
3. Repeated replication w/o cell division
chance of in frame fusion for operon? and gene?
microtubules
Polytene chromosome
Hfr bacteria
4. Can result in allele differences - suce as 3:1 and 1:3
kinase
gene conversion
PEP carboxykinase
EF-G
5. When exons are arranged in multiple orders after removal of introns
EF-G
phosphorolysis
alternative splicing
PEP carboxykinase
6. Nuclear lamins - desmins - keratins - internexins (structure)
SRP - signal recognition particle
alternative splicing
PFK1
intermediate filiments
7. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
F' (F-prime) bacteria
epimers
heterochromatin
Aromatic/Achiral AAs
8. Circular and double stranded
F+ bacteria
mtDNA and chDNA
Polytene chromosome
Pyridoxal-phosphate (PLP)
9. RNA protein-complex
[B]=[A] - ratio = 1
Hexokinase and PFK1
PEP carboxylase
SRP - signal recognition particle
10. 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.
Acetyl-CoA carboxylase
phosphorolysis
intermediate filiments
nucleophile
11. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
[A][B]
Hexokinase and PFK1
eEF-1 and eEF-2
origin of multi gene families
12. Gene duplication
cell plate
PFK2
origin of multi gene families
pH
13. 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
cis and trans golgi network
F' (F-prime) bacteria
chance of in frame fusion for operon? and gene?
14. Recruits RecA protein - inhibited by LexA - results in mutagenesis
pyruvate dehydrogenase
FAD and NADP ATP equivalents
cell plate
SOS repair
15. Can undergo both lytic and lysogenic cycle
cell plate
temperate bacteriophage
kb
phosphatase
16. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome
17. FAD-2 - NADP-3
Polytene chromosome
FAD and NADP ATP equivalents
cAMP
origin of multi gene families
18. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
cofactors
chymotrypsin
trypsin
Signal recognition particle (SRP)
19. Val - Leu - Ile - Ala - Met
FAD and NADP ATP equivalents
Non Polar AAs
northern blot
cis and trans golgi network
20. Krebs cycle enzyme
Steroid Hormones
chymotrypsin
F+ bacteria
aconitase
21. Donates electrons to form a bond such as N in amines and O in alcohols
Hexokinase and PFK1
nucleophile
chance of in frame fusion for operon? and gene?
cofactors
22. Serine protease that cleaves on c terminal side of aromatics
cAMP
Acetyl-CoA carboxylase
phosphorolysis
chymotrypsin
23. Isoelectric point and MW
VLDL
2D gel electrophoresis
mtDNA and chDNA
[A][B]
24. Gene has multiple effects
nucleophile
pleiotropic
SRP - signal recognition particle
intermediate filiments
25. Neutralizes H2O2 - found in lysosomes
epinephrine
mitochondria
catalase
phosphatase
26. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
[A][B]
Non Polar AAs
PFK2
Aromatic/Achiral AAs
27. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
PFK2
euchromatin
Polar AAs
EF-G
28. Phe - Trp - Tyr - Gly - Pro
Aromatic/Achiral AAs
kb
2D gel electrophoresis
chymotrypsin
29. 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
PEP carboxykinase
biotin
[A][B]
cAMP
30. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
microtubules
[A][B]
Charged AAs
Signal recognition particle (SRP)
31. Dynins and kinesins (movement) - cilia and flagella
origin of multi gene families
mtDNA and chDNA
microtubules
Aromatic/Achiral AAs
32. Makes Acetyl-CoA from pyruvate
Pyridoxal-phosphate (PLP)
origin of multi gene families
pyruvate dehydrogenase
phosphatase
33. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
PFK2
Non Polar AAs
Acetyl-CoA carboxylase
PEP carboxylase
34. 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
Charged AAs
nondisjunction
microtubules
epinephrine
35. An enzyme that removes a phosphate group from its substrate
pyruvate dehydrogenase
F+ bacteria
SOS repair
phosphatase
36. Do not contain F factor
chance of in frame fusion for operon? and gene?
eEF-1 and eEF-2
F- bacteria
Steroid Hormones
37. Can serve as a primer
38. Triglycerides - cholesterols - and phospholipids
VLDL
cofactors
[A][B]
tyrosine kinase
39. Enzymes in Krebs cycle that produce NADH
F+ bacteria
isocitrate dehydrogenase and a-ketogluterase
kinase
VLDL
40. = pKa+ log(B/A) - -log(Ka)
trypsin
PEP carboxylase
pH
mtDNA and chDNA
41. Failure of chromosome pairs to separate during meiosis
tyrosine kinase
SRP - signal recognition particle
Polar AAs
nondisjunction
42. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
VLDL
tyrosine kinase
EF-G
Hfr bacteria
43. Operon 1/2 - gene 1/6
SRP - signal recognition particle
2 -4 DNP
kb
chance of in frame fusion for operon? and gene?
44. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
Acetyl-CoA carboxylase
trypsin
PFK1
SOS repair
45. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
cofactors
Hfr bacteria
[A][B]
2 -4 DNP
46. Vitamin B1 - cofactor that aids in dehydrogenase mostly
F- bacteria
Thiamine Pyrophosphate (TPP)
gene conversion
northern blot
47. Actin - myosin - and other muscle proteins
mitochondria
kinase
microfiliments
Aromatic/Achiral AAs
48. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
euchromatin
PEP carboxykinase
Acetyl-CoA carboxylase
epinephrine
49. Only one carbon center is changed
[A][B]
Non Polar AAs
epimers
alternative splicing
50. Cis faces the ER and trans faces the plasma membrane
PEP carboxykinase
cis and trans golgi network
mtDNA and chDNA
microtubules