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An observer at rest near the source of the sound with f = 784 Hz. Another source of sound with 775 Hz is moving toward the observer at 2 m/s. If the v of the sound waves in air is 340 m/s, what is the beat f heard by the observer?
Assume that đź is increasing on [đ, đ]. Note that if đ â đ (đź) on [đ, đ], then đ
A company manufactures two products X and Y. Each product has to be processed in three departments: welding, assembly and painting. Each unit of X spends 2 hours in the welding department, 3 hours in assembly and 1 hour in painting. The corresponding times for a unit of Y are 3, 2 and 1 respectively. The man-hours available in a month are 1500 for the welding department, 1500 in assembly and 550 in painting. The contribution to profits are $100 for product X and $120 for product Y.
Formulate the appropriate linear programming problem
Solve it graphically to obtain the optimal solution for the maximum contribution
The following statements apply to natural higher unsaturated fatty acids: (select one or more)Â
a. they usually contain an even number of carbon atomsÂ
b. are cis-isomers Â
c. some representatives cannot be synthesized in the human bodyÂ
d. are broken down into separate pathways that are not related to the β-oxidation of saturated fatsÂ
e. contain conjugated double bondsÂ
The Michaelis-Menten hypothesis: (select one or more)Â
a. postulates the formation of an enzyme-substrate complexÂ
b. shows that the reaction rate depends on the substrate concentrationÂ
c. allows to determine the pl of the enzymeÂ
d. shows that the rate of the chemical reaction can be independent of the substrate concentrationÂ
The enzyme through which the pentose phosphate pathway is linked to glycolysis is: (select one)Â
a. glucanase
b. xylanase
c. acetalase
d. transcarbomylase
e. transketomylase
f. metallaseÂ
Which of the following statements is valid for the enzyme complexes of electron transport chains? (select one or more)Â
a. they are integral membrane proteins localized in the inner mitochondrial membraneÂ
b. they cannot be isolated from each other in a functional formÂ
c. have similar absorption spectra of visible lightÂ
d. interact with each other via mobile electronic carriersÂ
The sequence of post-synthetic mRNA changes in eukaryotes is: (select one)Â
a. 5-terminal cap formation, RNA splicing, 3-terminal polyadenylation, core exportÂ
b. RNA splicing, core export, 5-terminal cap formation, 3-terminal polyadenylationÂ
c. 5-terminal cap formation, 3-terminal polyadenylation, RNA splicing, core exportÂ
d. 5-terminal cap formation, core export, 3-terminal polyadenylation, RNA splicingÂ
e. RNA splicing, 5-terminal cap formation, 3-terminal polyadenylation, core exportÂ
What do glycogen breakdown and synthesis have in common? (select one or more)Â
a. both processes require uridine diphosphate glucoseÂ
b. both processes produce pyrophosphateÂ
c. both processes involve glucose 1-phosphateÂ
d. both are performed in the cytoplasmic glycogen granulesÂ
e. the same enzyme is used to introduce branches into the chain and to remove the branchesÂ
Which of the following reactions is unique to gluconeogenesis (select one)Â
a. lactate-pyruvateÂ
b. oxaloacetate-phosphoenolpyruvateÂ
c. phosphoenolpyruvate-2-phosphoglycerateÂ
d. glucose-6-phosphate-fructose-6-phosphateÂ
e. phosphoenolpyruvateÂ
