Glucokinase Has a K_m value of 10

question 40

Multiple Choice

Glucokinase has a K_m value of 10.0 mM,whereas hexokinase has a K_m value of 0.1 mM.Which of the following is this consistent with?

• A)Glucokinase acts on glucose only at high glucose concentrations.
• B)Glucokinase acts on glucose at low concentrations.
• C)Hexokinase acts on glucose only at high levels of glucose.
• D)Hexokinase acts at about half-maximal velocity at glucose concentrations of 4-5 mM.

---

Definitions:

Defence Mechanisms

Psychological strategies brought into play by individuals or the ego to protect against anxiety or social sanctions and to provide a refuge from a situation with which one cannot currently cope.

Skinner

B.F. Skinner, an influential American psychologist known for his work in behaviorism and the development of the theory of operant conditioning.

Psychosexual Stages

A series of developmental stages proposed by Freud, through which a child's personality develops, each characterized by the focus of libido on a different area of the body.

Freud

Sigmund Freud was an Austrian neurologist who founded psychoanalysis, a method for treating psychopathology through dialogue between a patient and a psychoanalyst.