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