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