In the Pathway Leading from Threonine to Isoleucine, Threonine Dehydratase

question 95

Multiple Choice

In the pathway leading from threonine to isoleucine, threonine dehydratase is _____ by the presence of threonine.

• A)activated
• B)inhibited
• C)degraded
• D)caused to increase in number
• E)caused to decrease in number

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Definitions:

Uranium-238

A naturally occurring isotope of uranium, accounting for 99% of natural uranium, which is weakly radioactive and used as a source of nuclear fuel.

Plutonium-239

A radioactive isotope of plutonium, used as a key component in nuclear weapons and as a fuel in some types of nuclear reactors.

Fast-moving Neutrons

Neutrons with high kinetic energy, often associated with nuclear reactions, that can initiate fission in certain materials.

High-level Wastes

Radioactive waste produced by nuclear reactors, reprocessing plants, and from the decommissioning of nuclear facilities, presenting serious hazards due to its high radiation levels.