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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 eukaryotes
eEF-1 and eEF-2
kinase
chymotrypsin
Hfr bacteria
2. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
VLDL
cofactors
Hfr bacteria
Pyruvate carboxylase
3. 1e-14
cofactors
heterochromatin
Hfr bacteria
[A][B]
4. Cleaves on C terminal side of lysine and arginine
Non Polar AAs
trypsin
SRP - signal recognition particle
Thiamine Pyrophosphate (TPP)
5. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
pyruvate dehydrogenase
PEP carboxylase
nondisjunction
Polar AAs
6. 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 -
cofactors
kinase
Hfr bacteria
pleiotropic
7. Can undergo both lytic and lysogenic cycle
2D gel electrophoresis
intermediate filiments
temperate bacteriophage
Hfr bacteria
8. Isoelectric point and MW
2D gel electrophoresis
microtubules
SOS repair
Polytene chromosome
9. RNA protein-complex
Steroid Hormones
SRP - signal recognition particle
nucleophile
pH
10. Gene duplication
tyrosine kinase
F' (F-prime) bacteria
origin of multi gene families
2D gel electrophoresis
11. (His - Arg - Lys +) - (Glu - Asp -)
chymotrypsin
Hexokinase and PFK1
intermediate filiments
Charged AAs
12. Actin - myosin - and other muscle proteins
chymotrypsin
catalase
microfiliments
mtDNA and chDNA
13. Dynins and kinesins (movement) - cilia and flagella
pyruvate dehydrogenase
microtubules
phosphatase
origin of multi gene families
14. Circular and double stranded
Polar AAs
chymotrypsin
catalase
mtDNA and chDNA
15. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
tyrosine kinase
centimorgans
PEP carboxylase
VLDL
16. 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.
2 -4 DNP
phosphorolysis
Steroid Hormones
kb
17. Contain their own DNA - mRNA - and proteins to synthesize more
centimorgans
mitochondria
phosphorolysis
kb
18. Operon 1/2 - gene 1/6
chance of in frame fusion for operon? and gene?
SOS repair
Aromatic/Achiral AAs
alternative splicing
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.
Hfr bacteria
heterochromatin
Hexokinase and PFK1
phosphorolysis
20. 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
epimers
pleiotropic
epinephrine
2 -4 DNP
21. 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
kb
PFK1
Acetyl-CoA carboxylase
epinephrine
22. An enzyme that removes a phosphate group from its substrate
phosphatase
F+ bacteria
SOS repair
cell plate
23. Only one carbon center is changed
intermediate filiments
Steroid Hormones
aconitase
epimers
24. Failure of chromosome pairs to separate during meiosis
nondisjunction
centimorgans
PEP carboxykinase
alternative splicing
25. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
euchromatin
Hfr bacteria
Non Polar AAs
EF-G
26. Nuclear lamins - desmins - keratins - internexins (structure)
cofactors
intermediate filiments
microfiliments
nucleophile
27. Can result in allele differences - suce as 3:1 and 1:3
2 -4 DNP
[B]=[A] - ratio = 1
PEP carboxylase
gene conversion
28. Val - Leu - Ile - Ala - Met
gene conversion
Non Polar AAs
cell plate
Hfr bacteria
29. Enter cells freely
Polar AAs
Steroid Hormones
epimers
FAD and NADP ATP equivalents
30. Krebs cycle enzyme
[B]=[A] - ratio = 1
aconitase
isocitrate dehydrogenase and a-ketogluterase
Charged AAs
31. Vitamin B1 - cofactor that aids in dehydrogenase mostly
Thiamine Pyrophosphate (TPP)
nucleophile
PFK1
microfiliments
32. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
PFK2
cell plate
Charged AAs
heterochromatin
33. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
heterochromatin
eEF-1 and eEF-2
F' (F-prime) bacteria
epinephrine
34. 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
epinephrine
PEP carboxykinase
35. MRNA
northern blot
Thiamine Pyrophosphate (TPP)
VLDL
Polar AAs
36. Serine protease that cleaves on c terminal side of aromatics
heterochromatin
chymotrypsin
pH
aconitase
37. 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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38. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
SRP - signal recognition particle
PEP carboxykinase
Steroid Hormones
cofactors
39. Neutralizes H2O2 - found in lysosomes
temperate bacteriophage
2D gel electrophoresis
eEF-1 and eEF-2
catalase
40. Recruits RecA protein - inhibited by LexA - results in mutagenesis
catalase
epinephrine
eEF-1 and eEF-2
SOS repair
41. PKa = pH
pH
[B]=[A] - ratio = 1
Non Polar AAs
chymotrypsin
42. Enzymes in Krebs cycle that produce NADH
Non Polar AAs
isocitrate dehydrogenase and a-ketogluterase
SRP - signal recognition particle
heterochromatin
43. Measures physical base pair distance
2D gel electrophoresis
Hfr bacteria
kb
Charged AAs
44. Gene has multiple effects
cis and trans golgi network
phosphatase
mitochondria
pleiotropic
45. FAD-2 - NADP-3
Acetyl-CoA carboxylase
cis and trans golgi network
PFK1
FAD and NADP ATP equivalents
46. Ser - Cys - Thr - Gln - Asn
Polar AAs
Aromatic/Achiral AAs
Non Polar AAs
microfiliments
47. 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.
Polytene chromosome
origin of multi gene families
F+ bacteria
aconitase
48. Phe - Trp - Tyr - Gly - Pro
chance of in frame fusion for operon? and gene?
F+ bacteria
Aromatic/Achiral AAs
Steroid Hormones
49. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
alternative splicing
gene conversion
2 -4 DNP
Signal recognition particle (SRP)
50. Do not contain F factor
F- bacteria
PFK2
Charged AAs
epinephrine