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