A two-stage chemostat system is used for production of secondary metabolite. The volume of each reactor is 0.5 m³; the flow rate of feed is 50 l h^{- 1}. Mycelial growth occurs in the first reactor; the second reactor is used for product synthesis. The concentration of substrate in the feed is 10 gl^-1. Kinetic and yield parameters for the organism are:

                                                            

Assume that product synthesis is negligible in the first reactor and growth is negligible in the second reactor. Determine substrate concentrations entering the second reactor.

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#Question id: 2506

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following is not typical of the “cargo” moved by molecular motors?

#Question id: 2508

#Section 3: Genetics, Cellular and Molecular Biology

If you treated cells with a drug that interferes with microtubules, such as colchicine, which of the following would result?

A. Cell shape would be disrupted.

B. Mitosis and meiosis would not occur.

C. The intracellular location of organelles would be disrupted.

#Question id: 2509

#Section 3: Genetics, Cellular and Molecular Biology

Which of the molecular motor proteins is associated with microtubules?

#Question id: 2510

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following cytoskeletal components is not found in all eukaryotic cells?

#Question id: 2527

#Section 3: Genetics, Cellular and Molecular Biology

Transpirational water flow in the xylem requires a mechanically strong wall that resists from,

#Question id: 2531

#Section 3: Genetics, Cellular and Molecular Biology

The specific linkages between sugar rings, including the specific carbons that are linked together and the configuration of the linkage, are important for the properties of the polysaccharide;

 I) Amylose                             a)β(1,3)-linkages                                  

 II) Cellulose                            b) β (1,4)-linkages

  III) Callose                             c) α(1,4)-linked

                                                 d) α (1,3)-linkages

Which of the following linkage combination is correct linkages of the polysaccharides?