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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. Phe - Trp - Tyr - Gly - Pro
[A][B]
euchromatin
pH
Aromatic/Achiral AAs
2. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
Aromatic/Achiral AAs
euchromatin
F+ bacteria
PFK2
3. Cis faces the ER and trans faces the plasma membrane
trypsin
alternative splicing
origin of multi gene families
cis and trans golgi network
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
cAMP
PFK2
kb
2 -4 DNP
5. Derived from golgi vesicles
mitochondria
F- bacteria
cell plate
PEP carboxykinase
6. FAD-2 - NADP-3
FAD and NADP ATP equivalents
PFK2
2D gel electrophoresis
eEF-1 and eEF-2
7. 1e-14
F+ bacteria
[A][B]
mitochondria
northern blot
8. Irreversible reaction that require ATP first part of glycolosis
F' (F-prime) bacteria
PEP carboxylase
[B]=[A] - ratio = 1
Hexokinase and PFK1
9. Recruits RecA protein - inhibited by LexA - results in mutagenesis
heterochromatin
pyruvate dehydrogenase
gene conversion
SOS repair
10. Serine protease that cleaves on c terminal side of aromatics
chymotrypsin
epimers
PEP carboxylase
kinase
11. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
mtDNA and chDNA
tyrosine kinase
centimorgans
Pyruvate carboxylase
12. Repeated replication w/o cell division
Polytene chromosome
mtDNA and chDNA
catalase
Steroid Hormones
13. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
FAD and NADP ATP equivalents
Pyridoxal-phosphate (PLP)
PEP carboxykinase
Non Polar AAs
14. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
heterochromatin
catalase
epinephrine
mitochondria
15. Do not contain F factor
pyruvate dehydrogenase
F- bacteria
trypsin
2D gel electrophoresis
16. 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.
cAMP
Thiamine Pyrophosphate (TPP)
mtDNA and chDNA
Hfr bacteria
17. Isoelectric point and MW
2D gel electrophoresis
VLDL
Thiamine Pyrophosphate (TPP)
Pyruvate carboxylase
18. Can undergo both lytic and lysogenic cycle
phosphatase
pH
temperate bacteriophage
pleiotropic
19. 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.
Steroid Hormones
F+ bacteria
pyruvate dehydrogenase
Pyruvate carboxylase
20. Val - Leu - Ile - Ala - Met
Non Polar AAs
PEP carboxylase
kinase
SOS repair
21. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
Signal recognition particle (SRP)
biotin
cAMP
alternative splicing
22. When exons are arranged in multiple orders after removal of introns
3' terminal -OH
alternative splicing
gene conversion
PFK2
23. PKa = pH
biotin
temperate bacteriophage
Hfr bacteria
[B]=[A] - ratio = 1
24. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
phosphorolysis
Pyruvate carboxylase
euchromatin
origin of multi gene families
25. 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
isocitrate dehydrogenase and a-ketogluterase
Pyridoxal-phosphate (PLP)
FAD and NADP ATP equivalents
2D gel electrophoresis
26. (His - Arg - Lys +) - (Glu - Asp -)
trypsin
Charged AAs
kinase
Thiamine Pyrophosphate (TPP)
27. Donates electrons to form a bond such as N in amines and O in alcohols
tyrosine kinase
origin of multi gene families
EF-G
nucleophile
28. Gene has multiple effects
euchromatin
pleiotropic
nondisjunction
pyruvate dehydrogenase
29. Failure of chromosome pairs to separate during meiosis
nondisjunction
Pyruvate carboxylase
Non Polar AAs
temperate bacteriophage
30. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
mitochondria
PEP carboxylase
epimers
Steroid Hormones
31. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
SOS repair
northern blot
Signal recognition particle (SRP)
PEP carboxylase
32. 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 -
kinase
cofactors
PFK1
Polytene chromosome
33. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
FAD and NADP ATP equivalents
trypsin
eEF-1 and eEF-2
nucleophile
34. 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
PFK1
phosphatase
isocitrate dehydrogenase and a-ketogluterase
pyruvate dehydrogenase
35. Triglycerides - cholesterols - and phospholipids
VLDL
microtubules
nucleophile
nondisjunction
36. RNA protein-complex
kinase
PFK1
SRP - signal recognition particle
Aromatic/Achiral AAs
37. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
origin of multi gene families
PFK2
phosphorolysis
tyrosine kinase
38. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
Steroid Hormones
cofactors
F+ bacteria
mitochondria
39. Gene duplication
origin of multi gene families
chymotrypsin
euchromatin
mtDNA and chDNA
40. Neutralizes H2O2 - found in lysosomes
catalase
cis and trans golgi network
cell plate
2 -4 DNP
41. Cleaves on C terminal side of lysine and arginine
trypsin
kb
chymotrypsin
heterochromatin
42. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
2 -4 DNP
Polytene chromosome
F' (F-prime) bacteria
temperate bacteriophage
43. Circular and double stranded
F' (F-prime) bacteria
mtDNA and chDNA
Charged AAs
eEF-1 and eEF-2
44. MRNA
tyrosine kinase
epimers
Non Polar AAs
northern blot
45. Enzymes in Krebs cycle that produce NADH
pyruvate dehydrogenase
SRP - signal recognition particle
isocitrate dehydrogenase and a-ketogluterase
alternative splicing
46. Can result in allele differences - suce as 3:1 and 1:3
PEP carboxykinase
kb
isocitrate dehydrogenase and a-ketogluterase
gene conversion
47. Vitamin B1 - cofactor that aids in dehydrogenase mostly
intermediate filiments
SOS repair
Thiamine Pyrophosphate (TPP)
euchromatin
48. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
kinase
Acetyl-CoA carboxylase
2D gel electrophoresis
pH
49. Can serve as a primer
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50. Nuclear lamins - desmins - keratins - internexins (structure)
temperate bacteriophage
trypsin
intermediate filiments
pyruvate dehydrogenase