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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. 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
kinase
PFK1
epinephrine
cofactors
2. Circular and double stranded
2D gel electrophoresis
mtDNA and chDNA
nondisjunction
epinephrine
3. FAD-2 - NADP-3
Pyruvate carboxylase
FAD and NADP ATP equivalents
2D gel electrophoresis
alternative splicing
4. 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
[B]=[A] - ratio = 1
isocitrate dehydrogenase and a-ketogluterase
PFK1
biotin
5. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
phosphorolysis
cofactors
origin of multi gene families
centimorgans
6. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
northern blot
heterochromatin
tyrosine kinase
eEF-1 and eEF-2
7. Recruits RecA protein - inhibited by LexA - results in mutagenesis
nucleophile
Polytene chromosome
northern blot
SOS repair
8. Val - Leu - Ile - Ala - Met
Non Polar AAs
Hexokinase and PFK1
tyrosine kinase
PEP carboxylase
9. RNA protein-complex
SRP - signal recognition particle
alternative splicing
cAMP
chymotrypsin
10. 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.
cis and trans golgi network
Signal recognition particle (SRP)
Hfr bacteria
northern blot
11. Gene has multiple effects
intermediate filiments
cis and trans golgi network
pleiotropic
[A][B]
12. Cleaves on C terminal side of lysine and arginine
cis and trans golgi network
epinephrine
trypsin
phosphatase
13. Can undergo both lytic and lysogenic cycle
Steroid Hormones
gene conversion
temperate bacteriophage
trypsin
14. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome
15. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
phosphatase
biotin
microtubules
temperate bacteriophage
16. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
cofactors
northern blot
eEF-1 and eEF-2
PEP carboxykinase
17. When exons are arranged in multiple orders after removal of introns
euchromatin
alternative splicing
Hfr bacteria
tyrosine kinase
18. Do not contain F factor
Polytene chromosome
F- bacteria
mitochondria
trypsin
19. 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.
2D gel electrophoresis
3' terminal -OH
phosphorolysis
F- bacteria
20. = pKa+ log(B/A) - -log(Ka)
mtDNA and chDNA
2D gel electrophoresis
cis and trans golgi network
pH
21. Makes Acetyl-CoA from pyruvate
temperate bacteriophage
FAD and NADP ATP equivalents
pyruvate dehydrogenase
[B]=[A] - ratio = 1
22. Serine protease that cleaves on c terminal side of aromatics
Steroid Hormones
eEF-1 and eEF-2
cell plate
chymotrypsin
23. 1e-14
northern blot
chymotrypsin
VLDL
[A][B]
24. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
catalase
Steroid Hormones
tyrosine kinase
EF-G
25. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
epimers
[B]=[A] - ratio = 1
Non Polar AAs
Pyruvate carboxylase
26. Repeated replication w/o cell division
Hexokinase and PFK1
gene conversion
Polytene chromosome
microfiliments
27. Nuclear lamins - desmins - keratins - internexins (structure)
Pyruvate carboxylase
VLDL
intermediate filiments
[A][B]
28. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
Thiamine Pyrophosphate (TPP)
cell plate
PFK2
euchromatin
29. Failure of chromosome pairs to separate during meiosis
isocitrate dehydrogenase and a-ketogluterase
FAD and NADP ATP equivalents
nondisjunction
trypsin
30. Triglycerides - cholesterols - and phospholipids
pH
Hexokinase and PFK1
VLDL
biotin
31. 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
SRP - signal recognition particle
Pyridoxal-phosphate (PLP)
3' terminal -OH
epinephrine
32. Enter cells freely
3' terminal -OH
northern blot
cell plate
Steroid Hormones
33. Dynins and kinesins (movement) - cilia and flagella
catalase
microtubules
microfiliments
Signal recognition particle (SRP)
34. Gene duplication
Hexokinase and PFK1
gene conversion
Hfr bacteria
origin of multi gene families
35. Neutralizes H2O2 - found in lysosomes
trypsin
2 -4 DNP
catalase
[A][B]
36. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
Polar AAs
cis and trans golgi network
euchromatin
gene conversion
37. Derived from golgi vesicles
PEP carboxykinase
phosphorolysis
cell plate
VLDL
38. Vitamin B1 - cofactor that aids in dehydrogenase mostly
Thiamine Pyrophosphate (TPP)
Steroid Hormones
phosphatase
kinase
39. Can serve as a primer
40. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
centimorgans
alternative splicing
EF-G
[B]=[A] - ratio = 1
41. PKa = pH
2 -4 DNP
mitochondria
kb
[B]=[A] - ratio = 1
42. Irreversible reaction that require ATP first part of glycolosis
Hexokinase and PFK1
Pyruvate carboxylase
F- bacteria
northern blot
43. Contain their own DNA - mRNA - and proteins to synthesize more
mitochondria
pyruvate dehydrogenase
FAD and NADP ATP equivalents
F+ bacteria
44. Donates electrons to form a bond such as N in amines and O in alcohols
alternative splicing
epimers
nucleophile
origin of multi gene families
45. Only one carbon center is changed
epimers
PFK2
VLDL
cell plate
46. 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 -
pleiotropic
kinase
gene conversion
F' (F-prime) bacteria
47. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
northern blot
PEP carboxylase
3' terminal -OH
trypsin
48. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
euchromatin
Charged AAs
Signal recognition particle (SRP)
mitochondria
49. 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
2 -4 DNP
F- bacteria
pH
50. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
PEP carboxykinase
Hexokinase and PFK1
SOS repair
phosphatase