Practice Questions

TLS Online TPP Program

#Question id: 11656

What is the assumption of Clements in colonizing successional species?

#Unit 10. Ecological Principles

possession of space is all-important and that the colonists that get there first determine subsequent community structure, such as facilitation
Early colonists may exclude subsequent colonists such as
Any species can start the succession, but the eventual climax community is reached in a somewhat orderly fashion, such as tolerance
Each colonizing species made the environment a little different, such as facilitation

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TLS Online TPP Program

#Question id: 28059

#Unit 1. Molecules and their Interaction Relevant to Biology

Treatment of RNaseA with 8M urea, but without adding mercaptoethanol would

TLS Online TPP Program

#Question id: 28060

#Unit 1. Molecules and their Interaction Relevant to Biology

The peptide bond in proteins is

TLS Online TPP Program

#Question id: 28061

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following force/Bonds contributes to protein stability

a. van der Waals interactions

b. Ionic interaction

c. Hydrogen bond

d. Di-sulphide bond

TLS Online TPP Program

#Question id: 28062

#Unit 1. Molecules and their Interaction Relevant to Biology

Thermostable proteins are stable at high temperature due to

a. Vander Waals interaction

b. Ionic bond only

c. High protein’s hydrophobic core

d. high incidence of salt bridges

Which of the following is correct

TLS Online TPP Program

#Question id: 28063

#Unit 1. Molecules and their Interaction Relevant to Biology

Characteristics of Thermostable proteins are

a. loosely packed core as evidenced by a high surface-to-volume ratio.

b. High amounts of Arg

c. High amount of Ala in helices

d. Stable at high temperature due to High protein’s hydrophobic core and high incidence of salt bridges

TLS Online TPP Program

#Question id: 28064

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following Techniques can be used to for Measuring Stability of protein

a. DSC (calorimetry)

b. Urea gradient gels

Which of the following is correct