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Test your basic knowledge |
GRE Biochemistry
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Subjects
:
gre
,
science
Instructions:
Answer 50 questions in 15 minutes.
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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. Enter cells freely
PFK2
SRP - signal recognition particle
Steroid Hormones
kb
2. Gene duplication
epinephrine
microfiliments
origin of multi gene families
eEF-1 and eEF-2
3. 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.
cell plate
2D gel electrophoresis
[A][B]
F+ bacteria
4. 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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5. Val - Leu - Ile - Ala - Met
nucleophile
Non Polar AAs
heterochromatin
EF-G
6. Can undergo both lytic and lysogenic cycle
pyruvate dehydrogenase
Steroid Hormones
microfiliments
temperate bacteriophage
7. Dynins and kinesins (movement) - cilia and flagella
trypsin
Thiamine Pyrophosphate (TPP)
euchromatin
microtubules
8. 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
chymotrypsin
isocitrate dehydrogenase and a-ketogluterase
F+ bacteria
9. RNA protein-complex
intermediate filiments
SRP - signal recognition particle
Pyruvate carboxylase
euchromatin
10. Do not contain F factor
SOS repair
phosphorolysis
F- bacteria
gene conversion
11. An enzyme that removes a phosphate group from its substrate
pH
PEP carboxylase
Steroid Hormones
phosphatase
12. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
PFK2
EF-G
mitochondria
PFK1
13. Irreversible reaction that require ATP first part of glycolosis
SRP - signal recognition particle
mitochondria
alternative splicing
Hexokinase and PFK1
14. 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
cofactors
Polytene chromosome
PFK1
FAD and NADP ATP equivalents
15. Neutralizes H2O2 - found in lysosomes
nondisjunction
catalase
2D gel electrophoresis
Pyridoxal-phosphate (PLP)
16. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
cAMP
heterochromatin
temperate bacteriophage
gene conversion
17. Can serve as a primer
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18. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
EF-G
PEP carboxykinase
PFK1
Pyridoxal-phosphate (PLP)
19. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
SOS repair
Polytene chromosome
2 -4 DNP
Non Polar AAs
20. Cis faces the ER and trans faces the plasma membrane
kinase
cis and trans golgi network
cAMP
alternative splicing
21. Phe - Trp - Tyr - Gly - Pro
SOS repair
gene conversion
intermediate filiments
Aromatic/Achiral AAs
22. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
Polytene chromosome
trypsin
pyruvate dehydrogenase
eEF-1 and eEF-2
23. Vitamin B1 - cofactor that aids in dehydrogenase mostly
Thiamine Pyrophosphate (TPP)
Steroid Hormones
nucleophile
Polytene chromosome
24. 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.
Hfr bacteria
origin of multi gene families
centimorgans
catalase
25. Measures physical base pair distance
kb
euchromatin
pyruvate dehydrogenase
heterochromatin
26. Cleaves on C terminal side of lysine and arginine
Acetyl-CoA carboxylase
intermediate filiments
trypsin
F- bacteria
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
Pyridoxal-phosphate (PLP)
catalase
phosphatase
PEP carboxylase
28. When exons are arranged in multiple orders after removal of introns
alternative splicing
kb
chymotrypsin
pH
29. Donates electrons to form a bond such as N in amines and O in alcohols
F+ bacteria
nucleophile
kinase
Aromatic/Achiral AAs
30. Isoelectric point and MW
pyruvate dehydrogenase
2D gel electrophoresis
Charged AAs
cell plate
31. Only one carbon center is changed
epimers
Polar AAs
trypsin
Non Polar AAs
32. Triglycerides - cholesterols - and phospholipids
pyruvate dehydrogenase
VLDL
euchromatin
kinase
33. MRNA
cAMP
northern blot
FAD and NADP ATP equivalents
temperate bacteriophage
34. Makes Acetyl-CoA from pyruvate
biotin
pyruvate dehydrogenase
centimorgans
Charged AAs
35. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
Steroid Hormones
eEF-1 and eEF-2
centimorgans
Pyridoxal-phosphate (PLP)
36. Actin - myosin - and other muscle proteins
intermediate filiments
microfiliments
nucleophile
Signal recognition particle (SRP)
37. = pKa+ log(B/A) - -log(Ka)
PFK2
pH
phosphatase
chance of in frame fusion for operon? and gene?
38. Ser - Cys - Thr - Gln - Asn
cAMP
trypsin
Polar AAs
eEF-1 and eEF-2
39. Serine protease that cleaves on c terminal side of aromatics
chymotrypsin
Non Polar AAs
gene conversion
PFK2
40. Enzymes in Krebs cycle that produce NADH
phosphorolysis
isocitrate dehydrogenase and a-ketogluterase
FAD and NADP ATP equivalents
cell plate
41. Gene has multiple effects
pleiotropic
chymotrypsin
Thiamine Pyrophosphate (TPP)
pyruvate dehydrogenase
42. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
Polytene chromosome
epimers
kb
cofactors
43. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
mitochondria
Pyruvate carboxylase
PEP carboxykinase
biotin
44. FAD-2 - NADP-3
FAD and NADP ATP equivalents
cofactors
alternative splicing
kinase
45. Derived from golgi vesicles
cell plate
centimorgans
origin of multi gene families
kb
46. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
phosphorolysis
FAD and NADP ATP equivalents
chymotrypsin
PEP carboxykinase
47. (His - Arg - Lys +) - (Glu - Asp -)
cAMP
[A][B]
Charged AAs
2D gel electrophoresis
48. Circular and double stranded
intermediate filiments
tyrosine kinase
mtDNA and chDNA
euchromatin
49. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
PEP carboxylase
intermediate filiments
temperate bacteriophage
biotin
50. 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 -
gene conversion
kinase
chymotrypsin
EF-G
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