Practice Questions

TLS Online TPP Program

#Question id: 584

The non-enzymatic hydrolysis of sucrose into glucose and fructose is an example of a pseudo first-order reaction because

#Section 2: General Biology

no enzymes are involved.
water has no role in the reaction.
water is of such high concentration as to be considered constant.
water is present at concentrations proportional to the sucrose.

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TLS Online TPP Program

#Question id: 4903

#Section 3: Genetics, Cellular and Molecular Biology

In genetic maternal effect

TLS Online TPP Program

#Question id: 12995

#Section 2: General Biology

Which of the following constraints affect the stability α-helix,

a) the intrinsic propensity of an amino acid residue to form an α-helix.

b) the interactions between R groups.

c) the bulkiness of adjacent R groups.

d) the occurrence of Pro and Gly residues.

TLS Online TPP Program

#Question id: 383

#Section 4: Fundamentals of Biological Engineering

Three buffers are made by combining a 1 M solution of acetic acid with a 1 M solution of sodium acetate in the ratios shown below

1 M acetic acid	1 M sodium acetate
Buffer 1: 10 mL	90 mL
Buffer 2: 50 mL	50 mL
Buffer 3: 90 mL	10 mL

Which of these statements is true of the resulting buffers?

TLS Online TPP Program

#Question id: 359

#Section 4: Fundamentals of Biological Engineering

What is the concentration of OH− in a solution with an H+ concentration of 1.3 × 10^−4 M?

TLS Online TPP Program

#Question id: 14302

#Section 5: Bioprocess Engineering and Process Biotechnology

Pseudomonas sp. has a mass doubling time of 2.4 h when grown on acetate. The saturation constant using this substrate is 1.3 g/l (which is unusually high), and cell yield on acetate is 0.46 g cell/g acetate. If we operate a chemostat on a feed stream containing 38 g/l acetate, find the Substrate concentration when the dilution rate is 0.8Dmax?

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