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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. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
kb
intermediate filiments
heterochromatin
Pyruvate carboxylase
2. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
chance of in frame fusion for operon? and gene?
pH
microtubules
centimorgans
3. 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
cofactors
northern blot
epimers
4. Contain their own DNA - mRNA - and proteins to synthesize more
aconitase
microfiliments
mitochondria
pH
5. 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.
chymotrypsin
F+ bacteria
PEP carboxykinase
tyrosine kinase
6. Neutralizes H2O2 - found in lysosomes
pyruvate dehydrogenase
trypsin
catalase
chance of in frame fusion for operon? and gene?
7. Actin - myosin - and other muscle proteins
FAD and NADP ATP equivalents
3' terminal -OH
epinephrine
microfiliments
8. PKa = pH
isocitrate dehydrogenase and a-ketogluterase
[A][B]
[B]=[A] - ratio = 1
microtubules
9. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
biotin
tyrosine kinase
pH
cis and trans golgi network
10. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
heterochromatin
catalase
EF-G
Aromatic/Achiral AAs
11. Can undergo both lytic and lysogenic cycle
temperate bacteriophage
Pyruvate carboxylase
mitochondria
2 -4 DNP
12. Can serve as a primer
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13. 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.
Steroid Hormones
phosphorolysis
PEP carboxykinase
trypsin
14. Cleaves on C terminal side of lysine and arginine
trypsin
[A][B]
kinase
Charged AAs
15. Phe - Trp - Tyr - Gly - Pro
cAMP
Aromatic/Achiral AAs
heterochromatin
epinephrine
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
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17. Failure of chromosome pairs to separate during meiosis
centimorgans
Polar AAs
SOS repair
nondisjunction
18. Can result in allele differences - suce as 3:1 and 1:3
northern blot
FAD and NADP ATP equivalents
gene conversion
aconitase
19. Gene duplication
PEP carboxylase
origin of multi gene families
[B]=[A] - ratio = 1
epinephrine
20. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
[B]=[A] - ratio = 1
Pyruvate carboxylase
alternative splicing
2D gel electrophoresis
21. Cis faces the ER and trans faces the plasma membrane
cis and trans golgi network
temperate bacteriophage
epimers
heterochromatin
22. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
EF-G
eEF-1 and eEF-2
intermediate filiments
origin of multi gene families
23. Circular and double stranded
nucleophile
mtDNA and chDNA
PEP carboxylase
PFK1
24. Gene has multiple effects
Charged AAs
pleiotropic
2 -4 DNP
gene conversion
25. Repeated replication w/o cell division
Hexokinase and PFK1
chymotrypsin
euchromatin
Polytene chromosome
26. 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 -
euchromatin
alternative splicing
kinase
3' terminal -OH
27. Irreversible reaction that require ATP first part of glycolosis
aconitase
3' terminal -OH
Hexokinase and PFK1
phosphorolysis
28. 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
cAMP
isocitrate dehydrogenase and a-ketogluterase
gene conversion
Polar AAs
29. FAD-2 - NADP-3
EF-G
FAD and NADP ATP equivalents
epimers
cofactors
30. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
Pyruvate carboxylase
PEP carboxykinase
F- bacteria
alternative splicing
31. Enzymes in Krebs cycle that produce NADH
PFK1
isocitrate dehydrogenase and a-ketogluterase
centimorgans
Signal recognition particle (SRP)
32. An enzyme that removes a phosphate group from its substrate
tyrosine kinase
[B]=[A] - ratio = 1
phosphatase
Polar AAs
33. (His - Arg - Lys +) - (Glu - Asp -)
Thiamine Pyrophosphate (TPP)
cofactors
pH
Charged AAs
34. Operon 1/2 - gene 1/6
PEP carboxykinase
2 -4 DNP
chance of in frame fusion for operon? and gene?
cell plate
35. Only one carbon center is changed
epimers
Charged AAs
eEF-1 and eEF-2
SOS repair
36. = pKa+ log(B/A) - -log(Ka)
kinase
nucleophile
microfiliments
pH
37. Isoelectric point and MW
eEF-1 and eEF-2
Hfr bacteria
2D gel electrophoresis
phosphatase
38. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
SRP - signal recognition particle
microfiliments
chymotrypsin
PEP carboxylase
39. 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
chymotrypsin
epinephrine
epimers
tyrosine kinase
40. Nuclear lamins - desmins - keratins - internexins (structure)
intermediate filiments
pyruvate dehydrogenase
northern blot
Polar AAs
41. Makes Acetyl-CoA from pyruvate
pyruvate dehydrogenase
gene conversion
kinase
pH
42. When exons are arranged in multiple orders after removal of introns
pleiotropic
alternative splicing
Non Polar AAs
pyruvate dehydrogenase
43. Recruits RecA protein - inhibited by LexA - results in mutagenesis
Aromatic/Achiral AAs
SOS repair
Thiamine Pyrophosphate (TPP)
eEF-1 and eEF-2
44. Dynins and kinesins (movement) - cilia and flagella
[A][B]
microtubules
pyruvate dehydrogenase
F+ bacteria
45. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
Non Polar AAs
PEP carboxylase
cofactors
microtubules
46. Vitamin B1 - cofactor that aids in dehydrogenase mostly
chymotrypsin
Thiamine Pyrophosphate (TPP)
3' terminal -OH
euchromatin
47. Enter cells freely
nondisjunction
Steroid Hormones
trypsin
mitochondria
48. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
PFK2
Steroid Hormones
epinephrine
Hfr bacteria
49. Ser - Cys - Thr - Gln - Asn
Polar AAs
aconitase
microtubules
chance of in frame fusion for operon? and gene?
50. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
cis and trans golgi network
2 -4 DNP
FAD and NADP ATP equivalents
pH