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