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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. Enter cells freely
biotin
EF-G
Aromatic/Achiral AAs
Steroid Hormones
2. Failure of chromosome pairs to separate during meiosis
nondisjunction
Polar AAs
euchromatin
Signal recognition particle (SRP)
3. 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.
phosphorolysis
F+ bacteria
Polar AAs
Hexokinase and PFK1
4. Neutralizes H2O2 - found in lysosomes
cofactors
Hfr bacteria
FAD and NADP ATP equivalents
catalase
5. 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.
Hexokinase and PFK1
Hfr bacteria
eEF-1 and eEF-2
PEP carboxykinase
6. Contain their own DNA - mRNA - and proteins to synthesize more
pleiotropic
PFK1
mitochondria
heterochromatin
7. Donates electrons to form a bond such as N in amines and O in alcohols
northern blot
Hfr bacteria
Steroid Hormones
nucleophile
8. 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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9. 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
cis and trans golgi network
F+ bacteria
eEF-1 and eEF-2
10. Recruits RecA protein - inhibited by LexA - results in mutagenesis
SOS repair
cAMP
Non Polar AAs
2 -4 DNP
11. 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.
cofactors
phosphorolysis
Hexokinase and PFK1
FAD and NADP ATP equivalents
12. 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
SRP - signal recognition particle
Pyridoxal-phosphate (PLP)
Thiamine Pyrophosphate (TPP)
[A][B]
13. Do not contain F factor
tyrosine kinase
F- bacteria
Acetyl-CoA carboxylase
temperate bacteriophage
14. Dynins and kinesins (movement) - cilia and flagella
centimorgans
Thiamine Pyrophosphate (TPP)
microtubules
epinephrine
15. = pKa+ log(B/A) - -log(Ka)
phosphorolysis
pyruvate dehydrogenase
F+ bacteria
pH
16. Serine protease that cleaves on c terminal side of aromatics
cell plate
trypsin
chymotrypsin
PEP carboxykinase
17. (His - Arg - Lys +) - (Glu - Asp -)
gene conversion
Charged AAs
F- bacteria
Non Polar AAs
18. Circular and double stranded
mtDNA and chDNA
alternative splicing
Thiamine Pyrophosphate (TPP)
chymotrypsin
19. Actin - myosin - and other muscle proteins
Polar AAs
epinephrine
eEF-1 and eEF-2
microfiliments
20. Operon 1/2 - gene 1/6
Thiamine Pyrophosphate (TPP)
cell plate
pH
chance of in frame fusion for operon? and gene?
21. Tightly packed form of DNA - less accessible to protein factors that usually bind DNA
heterochromatin
Charged AAs
Acetyl-CoA carboxylase
northern blot
22. Can result in allele differences - suce as 3:1 and 1:3
EF-G
PFK1
chymotrypsin
gene conversion
23. Catalyzes the transport of tRNA and mRNA down the ribosome in prokaryotes
microfiliments
kinase
EF-G
euchromatin
24. Makes Acetyl-CoA from pyruvate
phosphorolysis
pyruvate dehydrogenase
F- bacteria
cell plate
25. Can serve as a primer
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26. Can undergo both lytic and lysogenic cycle
temperate bacteriophage
nondisjunction
2 -4 DNP
Hfr bacteria
27. Catalyzes the irreversible carboxylation of pyruvate to oxaloacetate (OAA).
Pyruvate carboxylase
Pyridoxal-phosphate (PLP)
Non Polar AAs
VLDL
28. FAD-2 - NADP-3
Steroid Hormones
EF-G
centimorgans
FAD and NADP ATP equivalents
29. Krebs cycle enzyme
temperate bacteriophage
aconitase
intermediate filiments
centimorgans
30. 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
cofactors
epinephrine
PFK2
phosphatase
31. Cis faces the ER and trans faces the plasma membrane
origin of multi gene families
cis and trans golgi network
pleiotropic
heterochromatin
32. Acetyl-CoA to malonyl-CoA - rate limiting step in fatty acid synthesis
SRP - signal recognition particle
Acetyl-CoA carboxylase
tyrosine kinase
Hfr bacteria
33. Val - Leu - Ile - Ala - Met
Pyruvate carboxylase
Non Polar AAs
microtubules
Hfr bacteria
34. 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
kinase
Steroid Hormones
catalase
35. Regulator of glycolysis when glucose is low by cleaving 2;6 BPG lowering PFK1 - opposite effect when glucose is high
isocitrate dehydrogenase and a-ketogluterase
centimorgans
PEP carboxylase
PFK2
36. PKa = pH
microfiliments
northern blot
[B]=[A] - ratio = 1
2 -4 DNP
37. Only one carbon center is changed
Hexokinase and PFK1
F' (F-prime) bacteria
epimers
pyruvate dehydrogenase
38. 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
Charged AAs
Aromatic/Achiral AAs
pH
PFK1
39. Vitamin B1 - cofactor that aids in dehydrogenase mostly
Pyridoxal-phosphate (PLP)
Thiamine Pyrophosphate (TPP)
chymotrypsin
Charged AAs
40. Unwound - participates in the active transcription of DNA to mRNA products - site of RNA Pol II regulation
euchromatin
pH
phosphorolysis
EF-G
41. Nuclear lamins - desmins - keratins - internexins (structure)
tyrosine kinase
intermediate filiments
temperate bacteriophage
3' terminal -OH
42. Gene duplication
cofactors
origin of multi gene families
Acetyl-CoA carboxylase
microtubules
43. MRNA
Steroid Hormones
northern blot
nucleophile
2 -4 DNP
44. 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
SOS repair
Polytene chromosome
kinase
cAMP
45. Non-protein chemical compound that is bound to a protein and is required for the protein'S biological activity
Hfr bacteria
cofactors
gene conversion
eEF-1 and eEF-2
46. Isoelectric point and MW
alternative splicing
nucleophile
2D gel electrophoresis
temperate bacteriophage
47. Triglycerides - cholesterols - and phospholipids
phosphatase
VLDL
SOS repair
kb
48. Cleaves on C terminal side of lysine and arginine
mtDNA and chDNA
kinase
trypsin
pH
49. Irreversible reaction that require ATP first part of glycolosis
Polytene chromosome
heterochromatin
Hexokinase and PFK1
chance of in frame fusion for operon? and gene?
50. Catalyzes the transport of tRNA and mRNA down the ribosome in eukaryotes
Aromatic/Achiral AAs
eEF-1 and eEF-2
pleiotropic
F' (F-prime) bacteria