For a G Protein to Play Its Part in Moving

question 22

Multiple Choice

For a G protein to play its part in moving events forward in a signal pathway,

• A) GDP must be released, and a GTP must occupy the nucleotide-binding site.
• B) GTP must be released, and a GDP must occupy the nucleotide-binding site.
• C) cGMP must occupy the otherwise empty nucleotide-binding site.
• D) cGMP must leave the otherwise occupied nucleotide-binding site.
• E) None of the above

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Definitions:

Closed System

A theoretical concept in various sciences referring to a system that does not interact with others systems or its environment, exchanging neither matter nor energy.

Open System

A social system in which status is based on achieved attributes.

Social Stratification

The hierarchical arrangement of individuals or groups in society based on wealth, power, race, education, etc., which affects their access to resources and opportunities.

Caste

A form of social stratification characterized by hereditary status, endogamy, and social barriers sanctioned by custom or law.