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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. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
eEF-1 and eEF-2
cofactors
F' (F-prime) bacteria
trypsin
2. Ser - Cys - Thr - Gln - Asn
trypsin
Charged AAs
nucleophile
Polar AAs
3. FAD-2 - NADP-3
FAD and NADP ATP equivalents
SOS repair
epimers
pyruvate dehydrogenase
4. Isoelectric point and MW
mitochondria
kinase
phosphatase
2D gel electrophoresis
5. Gene has multiple effects
pleiotropic
[A][B]
2 -4 DNP
phosphorolysis
6. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
F+ bacteria
FAD and NADP ATP equivalents
Signal recognition particle (SRP)
Pyruvate carboxylase
7. Enter cells freely
SOS repair
kinase
VLDL
Steroid Hormones
8. Derived from golgi vesicles
cell plate
F- bacteria
FAD and NADP ATP equivalents
Charged AAs
9. 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
origin of multi gene families
microfiliments
[B]=[A] - ratio = 1
epinephrine
10. Contain their own DNA - mRNA - and proteins to synthesize more
pyruvate dehydrogenase
mitochondria
Hexokinase and PFK1
microfiliments
11. 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
2D gel electrophoresis
trypsin
Pyruvate carboxylase
12. Catalyze the phosphorylation of tyrosine residues in proteins - involved in signal cascades
nucleophile
centimorgans
tyrosine kinase
Non Polar AAs
13. = pKa+ log(B/A) - -log(Ka)
pH
PFK1
pleiotropic
trypsin
14. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
SOS repair
PFK1
nucleophile
euchromatin
15. 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
PEP carboxylase
Hexokinase and PFK1
cofactors
cAMP
16. RNA protein-complex
tyrosine kinase
mitochondria
nucleophile
SRP - signal recognition particle
17. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
PFK2
Hfr bacteria
mitochondria
SOS repair
18. 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 -
F- bacteria
PFK2
catalase
kinase
19. Neutralizes H2O2 - found in lysosomes
F- bacteria
2 -4 DNP
Hexokinase and PFK1
catalase
20. 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
PFK1
chymotrypsin
Signal recognition particle (SRP)
tyrosine kinase
21. Enzymes in Krebs cycle that produce NADH
[A][B]
isocitrate dehydrogenase and a-ketogluterase
epimers
chymotrypsin
22. Actin - myosin - and other muscle proteins
microfiliments
F' (F-prime) bacteria
F+ bacteria
Hfr bacteria
23. 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.
Pyruvate carboxylase
Aromatic/Achiral AAs
Hfr bacteria
aconitase
24. MRNA
Charged AAs
F+ bacteria
SRP - signal recognition particle
northern blot
25. Vitamin B1 - cofactor that aids in dehydrogenase mostly
Thiamine Pyrophosphate (TPP)
Non Polar AAs
microtubules
FAD and NADP ATP equivalents
26. When exons are arranged in multiple orders after removal of introns
alternative splicing
[B]=[A] - ratio = 1
centimorgans
euchromatin
27. Repeated replication w/o cell division
Polytene chromosome
microtubules
F+ bacteria
kb
28. Triglycerides - cholesterols - and phospholipids
PEP carboxylase
VLDL
aconitase
epinephrine
29. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
EF-G
catalase
nondisjunction
mtDNA and chDNA
30. Gene duplication
origin of multi gene families
cis and trans golgi network
euchromatin
2 -4 DNP
31. Recognizes and targets specific proteins to the endoplasmic reticulum in eukaryotes and the plasma membrane in prokaryotes
Acetyl-CoA carboxylase
Signal recognition particle (SRP)
centimorgans
gene conversion
32. Measures physical base pair distance
[B]=[A] - ratio = 1
kb
trypsin
Polytene chromosome
33. Can serve as a primer
34. 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
gene conversion
Polytene chromosome
Hfr bacteria
35. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
phosphatase
EF-G
isocitrate dehydrogenase and a-ketogluterase
Acetyl-CoA carboxylase
36. Recruits RecA protein - inhibited by LexA - results in mutagenesis
EF-G
SOS repair
Pyridoxal-phosphate (PLP)
mitochondria
37. PKa = pH
gene conversion
Charged AAs
[B]=[A] - ratio = 1
Acetyl-CoA carboxylase
38. Catalyzes the addition of bicarbonate to phosphoenolpyruvate (PEP) to form the four-carbon compound oxaloacetate
2 -4 DNP
PEP carboxylase
Steroid Hormones
3' terminal -OH
39. Circular and double stranded
cofactors
microfiliments
pH
mtDNA and chDNA
40. (His - Arg - Lys +) - (Glu - Asp -)
northern blot
epinephrine
F' (F-prime) bacteria
Charged AAs
41. An enzyme that removes a phosphate group from its substrate
Polytene chromosome
phosphatase
EF-G
chance of in frame fusion for operon? and gene?
42. Can undergo both lytic and lysogenic cycle
3' terminal -OH
centimorgans
temperate bacteriophage
pyruvate dehydrogenase
43. Only one carbon center is changed
Charged AAs
epimers
Acetyl-CoA carboxylase
Hfr bacteria
44. Operon 1/2 - gene 1/6
cofactors
mitochondria
chance of in frame fusion for operon? and gene?
pyruvate dehydrogenase
45. Converts oxaloacetate into phosphoenolpyruvate and carbon dioxide.
PEP carboxykinase
nucleophile
Pyridoxal-phosphate (PLP)
2 -4 DNP
46. Can result in allele differences - suce as 3:1 and 1:3
pH
Polar AAs
SOS repair
gene conversion
47. Vitamin B7 - cofactor that aids in CO2 transfer (carboxylase)
tyrosine kinase
phosphatase
biotin
Hexokinase and PFK1
48. Measure tendency for recombination (frequency) 1cM = 1% chance of being separated
centimorgans
pH
phosphorolysis
kinase
49. Serine protease that cleaves on c terminal side of aromatics
Charged AAs
aconitase
FAD and NADP ATP equivalents
chymotrypsin
50. Possess an F plasmid that also includes some DNA taken from the bacterial genome. Sometimes it is formed by incorrect excision from the chromosome