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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. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
EF-G
isocitrate dehydrogenase and a-ketogluterase
cofactors
F- bacteria
2. Measures physical base pair distance
3' terminal -OH
EF-G
kb
centimorgans
3. RNA protein-complex
aconitase
nucleophile
SRP - signal recognition particle
Charged AAs
4. Gene has multiple effects
pH
nucleophile
catalase
pleiotropic
5. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
alternative splicing
PFK1
pleiotropic
eEF-1 and eEF-2
6. 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
gene conversion
chance of in frame fusion for operon? and gene?
SRP - signal recognition particle
Pyridoxal-phosphate (PLP)
7. Ser - Cys - Thr - Gln - Asn
alternative splicing
kb
Hfr bacteria
Polar AAs
8. 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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9. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
Charged AAs
[A][B]
2 -4 DNP
heterochromatin
10. Irreversible reaction that require ATP first part of glycolosis
microtubules
Polytene chromosome
Hexokinase and PFK1
kb
11. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
Pyridoxal-phosphate (PLP)
phosphatase
Signal recognition particle (SRP)
epinephrine
12. Serine protease that cleaves on c terminal side of aromatics
nucleophile
pyruvate dehydrogenase
chymotrypsin
mtDNA and chDNA
13. Val - Leu - Ile - Ala - Met
F- bacteria
origin of multi gene families
centimorgans
Non Polar AAs
14. Can undergo both lytic and lysogenic cycle
Charged AAs
temperate bacteriophage
nondisjunction
euchromatin
15. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
tyrosine kinase
pH
Thiamine Pyrophosphate (TPP)
F' (F-prime) bacteria
16. Recruits RecA protein - inhibited by LexA - results in mutagenesis
trypsin
SOS repair
cAMP
nucleophile
17. 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 -
phosphorolysis
nucleophile
kinase
microfiliments
18. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
cofactors
PEP carboxylase
euchromatin
2 -4 DNP
19. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
euchromatin
tyrosine kinase
SOS repair
Acetyl-CoA carboxylase
20. Failure of chromosome pairs to separate during meiosis
3' terminal -OH
nondisjunction
kinase
cell plate
21. Makes Acetyl-CoA from pyruvate
mitochondria
pyruvate dehydrogenase
cis and trans golgi network
euchromatin
22. 1e-14
[A][B]
2 -4 DNP
phosphatase
Charged AAs
23. 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.
F+ bacteria
F- bacteria
Thiamine Pyrophosphate (TPP)
microtubules
24. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
alternative splicing
gene conversion
aconitase
2 -4 DNP
25. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
eEF-1 and eEF-2
centimorgans
Hexokinase and PFK1
Signal recognition particle (SRP)
26. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
epimers
F- bacteria
biotin
aconitase
27. Enter cells freely
Hfr bacteria
Steroid Hormones
F' (F-prime) bacteria
EF-G
28. Enzymes in Krebs cycle that produce NADH
epimers
Non Polar AAs
origin of multi gene families
isocitrate dehydrogenase and a-ketogluterase
29. Actin - myosin - and other muscle proteins
phosphatase
microfiliments
pyruvate dehydrogenase
eEF-1 and eEF-2
30. PKa = pH
phosphatase
alternative splicing
cis and trans golgi network
[B]=[A] - ratio = 1
31. Only one carbon center is changed
epimers
chance of in frame fusion for operon? and gene?
epinephrine
mitochondria
32. MRNA
intermediate filiments
alternative splicing
northern blot
Polytene chromosome
33. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
PFK2
chance of in frame fusion for operon? and gene?
nucleophile
pleiotropic
34. Isoelectric point and MW
Charged AAs
catalase
microfiliments
2D gel electrophoresis
35. Phe - Trp - Tyr - Gly - Pro
Aromatic/Achiral AAs
aconitase
Pyruvate carboxylase
2 -4 DNP
36. Repeated replication w/o cell division
Polytene chromosome
northern blot
euchromatin
FAD and NADP ATP equivalents
37. Dynins and kinesins (movement) - cilia and flagella
mtDNA and chDNA
nondisjunction
Signal recognition particle (SRP)
microtubules
38. Do not contain F factor
FAD and NADP ATP equivalents
cAMP
Pyridoxal-phosphate (PLP)
F- bacteria
39. Derived from golgi vesicles
Thiamine Pyrophosphate (TPP)
cell plate
mtDNA and chDNA
temperate bacteriophage
40. Circular and double stranded
Charged AAs
mtDNA and chDNA
PEP carboxykinase
eEF-1 and eEF-2
41. Nuclear lamins - desmins - keratins - internexins (structure)
intermediate filiments
Signal recognition particle (SRP)
kb
pleiotropic
42. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
Charged AAs
Pyruvate carboxylase
biotin
PEP carboxylase
43. Vitamin B1 - cofactor that aids in dehydrogenase mostly
Thiamine Pyrophosphate (TPP)
Pyruvate carboxylase
PEP carboxylase
temperate bacteriophage
44. An enzyme that removes a phosphate group from its substrate
phosphatase
chance of in frame fusion for operon? and gene?
Hfr bacteria
SRP - signal recognition particle
45. Donates electrons to form a bond such as N in amines and O in alcohols
nucleophile
Pyruvate carboxylase
microfiliments
pH
46. 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
SOS repair
biotin
tyrosine kinase
47. 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
FAD and NADP ATP equivalents
eEF-1 and eEF-2
heterochromatin
PFK1
48. Can result in allele differences - suce as 3:1 and 1:3
cell plate
phosphorolysis
Polar AAs
gene conversion
49. FAD-2 - NADP-3
PEP carboxykinase
eEF-1 and eEF-2
pyruvate dehydrogenase
FAD and NADP ATP equivalents
50. Krebs cycle enzyme
F' (F-prime) bacteria
aconitase
Signal recognition particle (SRP)
Polytene chromosome