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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. Failure of chromosome pairs to separate during meiosis
chymotrypsin
nondisjunction
catalase
cis and trans golgi network
2. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
Acetyl-CoA carboxylase
SOS repair
tyrosine kinase
Charged AAs
3. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
PEP carboxykinase
northern blot
catalase
F- bacteria
4. Only one carbon center is changed
microfiliments
epimers
cell plate
Pyruvate carboxylase
5. 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
catalase
FAD and NADP ATP equivalents
Pyridoxal-phosphate (PLP)
6. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
tyrosine kinase
2 -4 DNP
Non Polar AAs
PEP carboxylase
7. Enzymes in Krebs cycle that produce NADH
pleiotropic
chance of in frame fusion for operon? and gene?
PFK1
isocitrate dehydrogenase and a-ketogluterase
8. 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.
Charged AAs
Non Polar AAs
phosphorolysis
cell plate
9. 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
microfiliments
northern blot
PFK1
phosphatase
10. Repeated replication w/o cell division
F' (F-prime) bacteria
Polytene chromosome
cAMP
FAD and NADP ATP equivalents
11. Can serve as a primer
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12. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
2D gel electrophoresis
chymotrypsin
heterochromatin
biotin
13. Vitamin B1 - cofactor that aids in dehydrogenase mostly
origin of multi gene families
isocitrate dehydrogenase and a-ketogluterase
catalase
Thiamine Pyrophosphate (TPP)
14. Do not contain F factor
F- bacteria
phosphorolysis
phosphatase
pyruvate dehydrogenase
15. FAD-2 - NADP-3
Polar AAs
isocitrate dehydrogenase and a-ketogluterase
PEP carboxykinase
FAD and NADP ATP equivalents
16. Makes Acetyl-CoA from pyruvate
pyruvate dehydrogenase
FAD and NADP ATP equivalents
EF-G
[A][B]
17. 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
centimorgans
alternative splicing
epinephrine
3' terminal -OH
18. Ser - Cys - Thr - Gln - Asn
pH
temperate bacteriophage
Polar AAs
origin of multi gene families
19. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
Polar AAs
Acetyl-CoA carboxylase
cofactors
nucleophile
20. RNA protein-complex
F- bacteria
VLDL
Hexokinase and PFK1
SRP - signal recognition particle
21. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
3' terminal -OH
eEF-1 and eEF-2
EF-G
alternative splicing
22. = pKa+ log(B/A) - -log(Ka)
VLDL
Charged AAs
pH
F' (F-prime) bacteria
23. Can undergo both lytic and lysogenic cycle
biotin
temperate bacteriophage
Non Polar AAs
euchromatin
24. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
euchromatin
cAMP
Non Polar AAs
Signal recognition particle (SRP)
25. Krebs cycle enzyme
FAD and NADP ATP equivalents
tyrosine kinase
microtubules
aconitase
26. Dynins and kinesins (movement) - cilia and flagella
microtubules
kb
Hfr bacteria
2D gel electrophoresis
27. PKa = pH
phosphorolysis
2D gel electrophoresis
mitochondria
[B]=[A] - ratio = 1
28. Actin - myosin - and other muscle proteins
VLDL
2D gel electrophoresis
intermediate filiments
microfiliments
29. Enter cells freely
alternative splicing
Steroid Hormones
3' terminal -OH
gene conversion
30. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
cis and trans golgi network
eEF-1 and eEF-2
F- bacteria
aconitase
31. 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
EF-G
biotin
epimers
Pyridoxal-phosphate (PLP)
32. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
Polytene chromosome
euchromatin
pyruvate dehydrogenase
PFK2
33. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
heterochromatin
origin of multi gene families
isocitrate dehydrogenase and a-ketogluterase
SRP - signal recognition particle
34. Gene has multiple effects
pleiotropic
Hexokinase and PFK1
Non Polar AAs
Polytene chromosome
35. Gene duplication
cAMP
origin of multi gene families
mitochondria
northern blot
36. Can result in allele differences - suce as 3:1 and 1:3
gene conversion
alternative splicing
F- bacteria
epinephrine
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. 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
F+ bacteria
mtDNA and chDNA
39. Triglycerides - cholesterols - and phospholipids
epimers
phosphorolysis
euchromatin
VLDL
40. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
gene conversion
centimorgans
epinephrine
mitochondria
41. Recruits RecA protein - inhibited by LexA - results in mutagenesis
cAMP
nucleophile
PFK2
SOS repair
42. MRNA
euchromatin
intermediate filiments
pyruvate dehydrogenase
northern blot
43. Derived from golgi vesicles
microtubules
Polar AAs
cell plate
microfiliments
44. Circular and double stranded
cis and trans golgi network
2 -4 DNP
biotin
mtDNA and chDNA
45. 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.
F+ bacteria
tyrosine kinase
cofactors
Hfr bacteria
46. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
3' terminal -OH
tyrosine kinase
cofactors
microfiliments
47. Irreversible reaction that require ATP first part of glycolosis
F' (F-prime) bacteria
Hexokinase and PFK1
cofactors
alternative splicing
48. Phe - Trp - Tyr - Gly - Pro
PEP carboxykinase
Aromatic/Achiral AAs
chymotrypsin
Polar AAs
49. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
2D gel electrophoresis
2 -4 DNP
alternative splicing
pH
50. (His - Arg - Lys +) - (Glu - Asp -)
Charged AAs
chymotrypsin
F- bacteria
SRP - signal recognition particle