Practice Questions

TLS Online TPP Program

#Question id: 5844

In homologous genetic recombination, RecA protein is involved in:

#8. Inheritance Biology

formation of Holliday intermediates and branch migration.
introduction of negative supercoils into the recombination products.
nicking the two duplex DNA molecules to initiate the reaction.
pairing a DNA strand from one duplex DNA molecule with sequences in another duplex, regardless of complementarity.

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TLS Online TPP Program

#Question id: 566

#1. Molecules and their Interaction Relevant to Biology

The role of the metal ion (Mg2+) in catalysis by enolase is to

TLS Online TPP Program

#Question id: 2652

#2. Cellular Organization

Which of these acts as an inducer of the lac operon?

TLS Online TPP Program

#Question id: 10574

#10. Ecological Principles

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

TLS Online TPP Program

#Question id: 583

#1. Molecules and their Interaction Relevant to Biology

When there are two substrates in a reaction, the reaction is said to be second order if ________.

TLS Online TPP Program

#Question id: 4570

#11. Evolution and Behavior

Which pair would probably have agreed with the process that is depicted by this tree?