Practice Questions

TLS Online TPP Program

#Question id: 10574

Which of the following statements about the evolution of life histories is correct?

#SCPH06 I Botany

Stable environments with limited resources favor r-selected populations.
K-selected populations are most often found in environments where density-independent factors are important regulators of population size.
Most populations have both r- and K-selected characteristics that vary under different environmental conditions.
The reproductive efforts of r-selected populations are directed at producing just a few offspring with good competitive abilities

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TLS Online TPP Program

#Question id: 14296

#SCPH05 I Biotechnology

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 cell concentrations entering the second reactor.

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TLS Online TPP Program

#Question id: 1651

#SCPH01 Biochemistry

Ig idiotypes are found:

TLS Online TPP Program

#Question id: 1595

#I Life Science/ Life Sciences Group – I-V

The EBV antigen fragments will be presented by the virus-infected cells along with which of the following?

TLS Online TPP Program

#Question id: 14521

#SCPH01 Biochemistry