Practice Questions

TLS Online TPP Program

#Question id: 2110

According to the fluid mosaic model of cell membranes, phospholipids:

#Section 3: Genetics, Cellular and Molecular Biology

can move laterally along the plane of the membrane
frequently flip-flop from one side of the membrane to the other
occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane
have hydrophilic tails in the interior of the membrane

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TLS Online TPP Program

#Question id: 365

#Section 4: Fundamentals of Biological Engineering

Water is a polar molecule: the oxygen atom with its unshared electrons carries a partial negative charge (δ−) of ___________, and the hydrogen atoms each carry a partial positive charge (δ+) of __________, where e is the charge of the electron.

TLS Online TPP Program

#Question id: 20266

#Section 4: Fundamentals of Biological Engineering

Which of the following disaccharide is linked with β -1,4- glycosidic linkage-

TLS Online TPP Program

#Question id: 14250

#Section 5: Bioprocess Engineering and Process Biotechnology

A stirred-tank reactor is to be scaled down from 10 m3 to 0.1 m3. The dimensions of the large tank are: Dt = 2 m; Di = 0.5 m; N = 100 rpm. What would be the required rotational speed of the impeller in the small tank if impeller Re number is constant?

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TLS Online TPP Program

#Question id: 15179

#Section 6: Plant, Animal and Microbial Biotechnology