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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. Recruits RecA protein - inhibited by LexA - results in mutagenesis
phosphatase
cAMP
biotin
SOS repair
2. Gene has multiple effects
isocitrate dehydrogenase and a-ketogluterase
pleiotropic
phosphorolysis
F' (F-prime) bacteria
3. Circular and double stranded
mitochondria
nondisjunction
mtDNA and chDNA
alternative splicing
4. Makes Acetyl-CoA from pyruvate
aconitase
pyruvate dehydrogenase
kinase
PFK2
5. RNA protein-complex
SRP - signal recognition particle
[A][B]
2D gel electrophoresis
Thiamine Pyrophosphate (TPP)
6. Triglycerides - cholesterols - and phospholipids
VLDL
[B]=[A] - ratio = 1
Hfr bacteria
2 -4 DNP
7. Repeated replication w/o cell division
chymotrypsin
epinephrine
F' (F-prime) bacteria
Polytene chromosome
8. 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
pH
epinephrine
Polar AAs
Thiamine Pyrophosphate (TPP)
9. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
[A][B]
SOS repair
PFK2
microtubules
10. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
biotin
phosphorolysis
microfiliments
SRP - signal recognition particle
11. Operon 1/2 - gene 1/6
gene conversion
phosphorolysis
F- bacteria
chance of in frame fusion for operon? and gene?
12. 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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13. 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
phosphatase
PFK1
phosphorolysis
SRP - signal recognition particle
14. Gene duplication
[A][B]
catalase
origin of multi gene families
Signal recognition particle (SRP)
15. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
PFK2
eEF-1 and eEF-2
origin of multi gene families
[B]=[A] - ratio = 1
16. Only one carbon center is changed
Steroid Hormones
epimers
Charged AAs
cis and trans golgi network
17. Irreversible reaction that require ATP first part of glycolosis
Hfr bacteria
Hexokinase and PFK1
VLDL
mtDNA and chDNA
18. (His - Arg - Lys +) - (Glu - Asp -)
kb
Thiamine Pyrophosphate (TPP)
microfiliments
Charged AAs
19. MRNA
tyrosine kinase
microtubules
northern blot
cis and trans golgi network
20. Ser - Cys - Thr - Gln - Asn
gene conversion
Hexokinase and PFK1
Polar AAs
[B]=[A] - ratio = 1
21. 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
SOS repair
Hfr bacteria
cAMP
22. Neutralizes H2O2 - found in lysosomes
catalase
alternative splicing
Pyridoxal-phosphate (PLP)
3' terminal -OH
23. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
[A][B]
cis and trans golgi network
euchromatin
heterochromatin
24. 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 -
epinephrine
Thiamine Pyrophosphate (TPP)
kinase
chance of in frame fusion for operon? and gene?
25. It uncouples oxidative phosphorylation by carrying protons across the mitochondrial membrane - leading to a rapid consumption of energy without generation of ATP.
cell plate
Aromatic/Achiral AAs
nondisjunction
2 -4 DNP
26. 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.
origin of multi gene families
phosphorolysis
F+ bacteria
F' (F-prime) bacteria
27. PKa = pH
northern blot
heterochromatin
[B]=[A] - ratio = 1
origin of multi gene families
28. = pKa+ log(B/A) - -log(Ka)
phosphorolysis
pH
pyruvate dehydrogenase
biotin
29. Measures physical base pair distance
kb
SOS repair
Non Polar AAs
microfiliments
30. Donates electrons to form a bond such as N in amines and O in alcohols
nucleophile
pleiotropic
Pyruvate carboxylase
epimers
31. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
Polar AAs
Thiamine Pyrophosphate (TPP)
tyrosine kinase
temperate bacteriophage
32. Contain their own DNA - mRNA - and proteins to synthesize more
pyruvate dehydrogenase
mitochondria
Polar AAs
isocitrate dehydrogenase and a-ketogluterase
33. Dynins and kinesins (movement) - cilia and flagella
microtubules
phosphorolysis
SRP - signal recognition particle
Thiamine Pyrophosphate (TPP)
34. Cis faces the ER and trans faces the plasma membrane
cis and trans golgi network
Pyruvate carboxylase
FAD and NADP ATP equivalents
trypsin
35. Krebs cycle enzyme
[B]=[A] - ratio = 1
aconitase
cofactors
tyrosine kinase
36. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
[A][B]
PFK2
Pyruvate carboxylase
2 -4 DNP
37. An enzyme that removes a phosphate group from its substrate
chymotrypsin
Signal recognition particle (SRP)
isocitrate dehydrogenase and a-ketogluterase
phosphatase
38. 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)
Polar AAs
FAD and NADP ATP equivalents
F+ bacteria
39. Val - Leu - Ile - Ala - Met
Non Polar AAs
kinase
cAMP
origin of multi gene families
40. 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
SOS repair
PFK1
F+ bacteria
41. Nuclear lamins - desmins - keratins - internexins (structure)
trypsin
cell plate
intermediate filiments
pyruvate dehydrogenase
42. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
Acetyl-CoA carboxylase
SRP - signal recognition particle
Steroid Hormones
Thiamine Pyrophosphate (TPP)
43. Phe - Trp - Tyr - Gly - Pro
gene conversion
3' terminal -OH
kinase
Aromatic/Achiral AAs
44. Enter cells freely
Thiamine Pyrophosphate (TPP)
mtDNA and chDNA
catalase
Steroid Hormones
45. FAD-2 - NADP-3
FAD and NADP ATP equivalents
PEP carboxykinase
origin of multi gene families
Hexokinase and PFK1
46. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
cofactors
Aromatic/Achiral AAs
F+ bacteria
SRP - signal recognition particle
47. Failure of chromosome pairs to separate during meiosis
2 -4 DNP
biotin
heterochromatin
nondisjunction
48. Serine protease that cleaves on c terminal side of aromatics
origin of multi gene families
F+ bacteria
phosphorolysis
chymotrypsin
49. Can undergo both lytic and lysogenic cycle
PFK2
temperate bacteriophage
Steroid Hormones
alternative splicing
50. Do not contain F factor
Steroid Hormones
pleiotropic
Signal recognition particle (SRP)
F- bacteria