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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. Ser - Cys - Thr - Gln - Asn
biotin
temperate bacteriophage
Polar AAs
eEF-1 and eEF-2
2. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
EF-G
chymotrypsin
tyrosine kinase
centimorgans
3. Circular and double stranded
mtDNA and chDNA
EF-G
[B]=[A] - ratio = 1
alternative splicing
4. Measures physical base pair distance
gene conversion
kb
pH
Charged AAs
5. Do not contain F factor
F- bacteria
temperate bacteriophage
EF-G
alternative splicing
6. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
Polar AAs
Charged AAs
heterochromatin
temperate bacteriophage
7. 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.
intermediate filiments
Aromatic/Achiral AAs
mtDNA and chDNA
Hfr bacteria
8. Nuclear lamins - desmins - keratins - internexins (structure)
Hfr bacteria
chymotrypsin
Steroid Hormones
intermediate filiments
9. When exons are arranged in multiple orders after removal of introns
alternative splicing
eEF-1 and eEF-2
SRP - signal recognition particle
cell plate
10. Can result in allele differences - suce as 3:1 and 1:3
gene conversion
Thiamine Pyrophosphate (TPP)
PFK2
PEP carboxykinase
11. An enzyme that removes a phosphate group from its substrate
Charged AAs
phosphatase
epimers
FAD and NADP ATP equivalents
12. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
[A][B]
PEP carboxykinase
F- bacteria
Polar AAs
13. 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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14. Enzymes in Krebs cycle that produce NADH
SOS repair
epimers
isocitrate dehydrogenase and a-ketogluterase
intermediate filiments
15. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
pyruvate dehydrogenase
SOS repair
eEF-1 and eEF-2
[B]=[A] - ratio = 1
16. 1e-14
Pyruvate carboxylase
epimers
alternative splicing
[A][B]
17. Gene duplication
pleiotropic
origin of multi gene families
F+ bacteria
cis and trans golgi network
18. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
EF-G
tyrosine kinase
VLDL
catalase
19. Neutralizes H2O2 - found in lysosomes
catalase
EF-G
Charged AAs
northern blot
20. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
2 -4 DNP
Charged AAs
isocitrate dehydrogenase and a-ketogluterase
cofactors
21. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
biotin
pleiotropic
pH
trypsin
22. Isoelectric point and MW
phosphatase
F- bacteria
temperate bacteriophage
2D gel electrophoresis
23. Phe - Trp - Tyr - Gly - Pro
cell plate
northern blot
Aromatic/Achiral AAs
Pyruvate carboxylase
24. Operon 1/2 - gene 1/6
euchromatin
Pyruvate carboxylase
gene conversion
chance of in frame fusion for operon? and gene?
25. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
tyrosine kinase
PEP carboxykinase
3' terminal -OH
SOS repair
26. 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
Pyruvate carboxylase
euchromatin
VLDL
Pyridoxal-phosphate (PLP)
27. 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
microtubules
epinephrine
F- bacteria
Hfr bacteria
28. Recruits RecA protein - inhibited by LexA - results in mutagenesis
VLDL
PEP carboxykinase
northern blot
SOS repair
29. Repeated replication w/o cell division
Thiamine Pyrophosphate (TPP)
aconitase
Polytene chromosome
PFK2
30. 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
mitochondria
[A][B]
PFK1
pyruvate dehydrogenase
31. Triglycerides - cholesterols - and phospholipids
heterochromatin
eEF-1 and eEF-2
epimers
VLDL
32. RNA protein-complex
SRP - signal recognition particle
kinase
Charged AAs
kb
33. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
origin of multi gene families
Signal recognition particle (SRP)
pleiotropic
cAMP
34. Val - Leu - Ile - Ala - Met
Non Polar AAs
cofactors
Charged AAs
epinephrine
35. MRNA
cofactors
pyruvate dehydrogenase
northern blot
origin of multi gene families
36. (His - Arg - Lys +) - (Glu - Asp -)
cAMP
[A][B]
Charged AAs
Non Polar AAs
37. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
isocitrate dehydrogenase and a-ketogluterase
Acetyl-CoA carboxylase
catalase
microtubules
38. PKa = pH
mitochondria
[B]=[A] - ratio = 1
PFK1
Pyruvate carboxylase
39. Contain their own DNA - mRNA - and proteins to synthesize more
Pyruvate carboxylase
mitochondria
temperate bacteriophage
SOS repair
40. Can undergo both lytic and lysogenic cycle
PFK2
northern blot
2D gel electrophoresis
temperate bacteriophage
41. Actin - myosin - and other muscle proteins
microfiliments
heterochromatin
alternative splicing
[A][B]
42. Vitamin B1 - cofactor that aids in dehydrogenase mostly
chance of in frame fusion for operon? and gene?
Thiamine Pyrophosphate (TPP)
Acetyl-CoA carboxylase
microfiliments
43. 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 -
VLDL
kinase
alternative splicing
chance of in frame fusion for operon? and gene?
44. Can serve as a primer
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45. 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
euchromatin
biotin
centimorgans
cAMP
46. Dynins and kinesins (movement) - cilia and flagella
microtubules
biotin
cAMP
FAD and NADP ATP equivalents
47. Only one carbon center is changed
epimers
F' (F-prime) bacteria
Aromatic/Achiral AAs
FAD and NADP ATP equivalents
48. 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.
Acetyl-CoA carboxylase
Thiamine Pyrophosphate (TPP)
F+ bacteria
Polar AAs
49. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
PEP carboxylase
catalase
PFK2
alternative splicing
50. Derived from golgi vesicles
cell plate
Non Polar AAs
mitochondria
SOS repair