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The Michaelis-Menten hypothesis: (select one or more)
a. postulates the formation of an enzyme-substrate complex
b. shows that the reaction rate depends on the substrate concentration
c. allows to determine the pl of the enzyme
d. shows that the rate of the chemical reaction can be independent of the substrate concentration
The enzyme through which the pentose phosphate pathway is linked to glycolysis is: (select one)
a. glucanase
b. xylanase
c. acetalase
d. transcarbomylase
e. transketomylase
f. metallase
Which of the following statements is valid for the enzyme complexes of electron transport chains? (select one or more)
a. they are integral membrane proteins localized in the inner mitochondrial membrane
b. they cannot be isolated from each other in a functional form
c. have similar absorption spectra of visible light
d. interact with each other via mobile electronic carriers
The sequence of post-synthetic mRNA changes in eukaryotes is: (select one)
a. 5-terminal cap formation, RNA splicing, 3-terminal polyadenylation, core export
b. RNA splicing, core export, 5-terminal cap formation, 3-terminal polyadenylation
c. 5-terminal cap formation, 3-terminal polyadenylation, RNA splicing, core export
d. 5-terminal cap formation, core export, 3-terminal polyadenylation, RNA splicing
e. RNA splicing, 5-terminal cap formation, 3-terminal polyadenylation, core export
What do glycogen breakdown and synthesis have in common? (select one or more)
a. both processes require uridine diphosphate glucose
b. both processes produce pyrophosphate
c. both processes involve glucose 1-phosphate
d. both are performed in the cytoplasmic glycogen granules
e. the same enzyme is used to introduce branches into the chain and to remove the branches
Which of the following reactions is unique to gluconeogenesis (select one)
a. lactate-pyruvate
b. oxaloacetate-phosphoenolpyruvate
c. phosphoenolpyruvate-2-phosphoglycerate
d. glucose-6-phosphate-fructose-6-phosphate
e. phosphoenolpyruvate
The glyoxalate cycle allows the synthesis of glucose from (1)............ and is an example of gluconeogenesis in (2)..................
(1) a. citrate b. acetyl-CoA c. fructose-6-phosphate d. succinate e. fumarate
(2) a. plants, yeast, some microorganisms b.mammals, amphibian c. amphibians, birds
Which of the following compounds is not a precursor or intermediate in the synthesis of sphingomyelin (select one)
a. acetyl-CoA
b. palmitoyl-CoA
c. Serine
d. Lysophosphatidate
e. cytidine diphosphate-choline
If a chemical is insoluble in water,insoluble in lipid, only soluble in organic solvents, how can the human body absorb it. Many nutritional supplements fit into this category. Thank You.
1. You were informed that the oil spill that took place in the Kalba sea reached water desalination plants in the Fujairah area.
Formulate a hypothesis to state whether these bacteria will be able to thrive and function properly if they were to be used to treat oil spills in freshwater environments like the Fujairah desalination plants. Support your claim with scientific reasoning explaining why or why not.
