Practice Questions

TLS Online TPP Program

#Question id: 570

Which of the following is true for allosteric enzymes

#Unit 1. Molecules and their Interaction Relevant to Biology

Allosteric enzymes regulated primarily by covalent modification.
Allosteric enzymes usually catalyze several different reactions within a metabolic pathway.
Allosteric enzymes usually have more than one polypeptide chain.
Allosteric enzymes usually have only one active site.

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TLS Online TPP Program

#Question id: 11990

#Unit 10. Ecological Principles

Imagine that you are designing an experiment aimed at determining whether the initiation of migratory behavior is largely under genetic control. Of the following options, the best way to proceed is to

TLS Online TPP Program

#Question id: 11991

#Unit 10. Ecological Principles

The success with which plants extend their range northward following glacial retreat is best determined by

TLS Online TPP Program

#Question id: 11992

#Unit 10. Ecological Principles

Which of the following abiotic factors has the greatest influence on the metabolic rates of plants and animals?

TLS Online TPP Program

#Question id: 11993

#Unit 10. Ecological Principles

Which of the following statements about light in aquatic environments is correct?

TLS Online TPP Program

#Question id: 11994

#Unit 10. Ecological Principles

In mountainous areas of western North America, north-facing slopes would be expected to

TLS Online TPP Program

#Question id: 11995

#Unit 10. Ecological Principles

You are working for the Environmental Protection Agency and researching the effect of a potentially toxic chemical in drinking water. There is no documented scientific evidence showing that the chemical is toxic, but many suspect it to be a health hazard. Using the precautionary principle, what would be a reasonable environmental policy?