TLS Online TPP Program

#Question id: 12587


The most plausible  hypothesis to  explain why  species richness is  higher in  tropical  than in  temperate regions is that

#Unit 10. Ecological Principles
  1. Tropical communities are younger.
  2. Tropical regions generally have more available water and higher levels of solar radiation. 
  3. Higher temperatures cause more rapid speciation.
  4. Biodiversity increases as evapotranspiration decreases.
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TLS Online TPP Program

#Question id: 599

#Unit 1. Molecules and their Interaction Relevant to Biology

In a certain enzyme-catalyzed reaction the following steps occur:

1. A phosphate group on substrate A is transferred to a side chain of an active site residue of the enzyme.

2. The dephosphorylated form of substrate A dissociates from the enzyme.

3. Substrate B enters the active site and is phosphorylated with simultaneous regeneration of the enzyme in its original form.

What kind of kinetic mechanism is described?

TLS Online TPP Program

#Question id: 600

#Unit 1. Molecules and their Interaction Relevant to Biology

Two substances are used to produce a certain biological product in an enzyme-catalyzed reaction. It is found that both substrates must bind to the enzyme, first one, then the other before the product is produced. This is an example of a/an ________.

TLS Online TPP Program

#Question id: 601

#Unit 1. Molecules and their Interaction Relevant to Biology

In a ping-pong reaction which does not occur?

TLS Online TPP Program

#Question id: 602

#Unit 1. Molecules and their Interaction Relevant to Biology

An inhibitor binds to a site other than the active site of the enzyme. Which statement below correlates with this observation?

TLS Online TPP Program

#Question id: 603

#Unit 1. Molecules and their Interaction Relevant to Biology

Nonclassical competitive inhibition involves ________.

TLS Online TPP Program

#Question id: 604

#Unit 1. Molecules and their Interaction Relevant to Biology

An enzyme is irreversibly inhibited by diisopropylfluorophosphate (DFP). What does this show?