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TLS Online TPP Program

#Question id: 5841

How are the BRCA proteins and their genes implicated in breast cancer?

#Section 3: Genetics, Cellular and Molecular Biology

  1. The BRCA proteins damage DNA by generating double-stranded breaks which can lead to cancer.

  2. Cells become more susceptible to damage if the genes for these proteins are damaged.

  3. BRCA proteins inhibit excision repair mechanisms.

  4. BRCA proteins initiate recombination between non-homologous DNA sequences.

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TLS Online TPP Program

#Question id: 15643

#Section 4: Fundamentals of Biological Engineering

The decrease in apparent viscosity of a liquid with increasing shear rate, is known as
TLS Online TPP Program

#Question id: 15644

#Section 4: Fundamentals of Biological Engineering

Based on the flow behavior of fluids depicted in the following figure. choose the correct option.
TLS Online TPP Program

#Question id: 15645

#Section 4: Fundamentals of Biological Engineering

An aluminium pot contains water that is kept steadily boiling (100 °C). The bottom surface of the pot, which is 0.012 m thick and 1.5 x 104 mm2 in area, is maintained at a temperature of 102 °C by an electric heating unit. Find the rate at which heat is transferred through the bottom surface. Given k= 235 W.m-1.K-1
TLS Online TPP Program

#Question id: 15646

#Section 4: Fundamentals of Biological Engineering

The quantity of heat required to evaporate 1 kg of a saturated liquid is called
TLS Online TPP Program

#Question id: 15647

#Section 4: Fundamentals of Biological Engineering

A liquid stream is cooled from 80°C to 30°C in a double pipe heat exchanger as illustrated below: 

Fluid flowing counter currently with this stream is heated from 15°C to 30°C. Calculate the log mean temperature difference. 
TLS Online TPP Program

#Question id: 15648

#Section 4: Fundamentals of Biological Engineering

The main function of baffles in a bioreactor are
P. to prevent a vortex
Q. to increase aeration
R. to reduce interfacial area of oxygen transfer
S. to reduce aeration rate