Figure 6.3 In the Accompanying Figure, Why Does the Curve Sharply Drop

question 78

Multiple Choice

Figure 6.3
In the accompanying figure, why does the curve sharply drop after approximately 45°C instead of mirroring the slope of the line going from 0-40°C?

• A) At high temperatures, the reactions proceed so quickly that enzymes are no longer helpful or required.
• B) This is true of all catalysts and is not due to any special features of enzymes.
• C) The kinetic energy of the reactants is so great that it destabilizes the enzyme and diminishes the enzyme's activity.
• D) The kinetic energy of the reactants is lower than that of the products, forcing a change in enzyme activity.
• E) The enzyme begins to denature above a certain temperature, eliminating all catalytic activity of the protein.

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Definitions:

Reaction Formation

Psychological defense mechanism in which a person forms an opposite emotional or behavioral reaction to the way he or she really feels to keep those true feelings hidden from self and others.

Freud

Sigmund Freud, an Austrian neurologist and the founder of psychoanalysis, a clinical method for treating psychopathology through dialogue between a patient and a psychoanalyst.

External Locus of Control

A belief that one's successes or failures result from external factors beyond one's control.

Rotter

Julian B. Rotter, a psychologist known for his work on locus of control, a theory about how people perceive the source of life events and outcomes as either within themselves or externally.