An Isolate of Streptococcus Pneumoniae from a Patient with Meningitis

question 152

Multiple Choice

An isolate of Streptococcus pneumoniae from a patient with meningitis is incubated with low-dose radiolabeled ceftriaxone and then subjected to protein electrophoresis.  Five distinct bands are detected by radioautography.
These bands most likely represent radiolabeled ceftriaxone that is bound to which of the following?

• A)Cell wall glycoproteins
• B)DNA replication proteins
• C)Porins
• D)Ribosomal proteins
• E)Transpeptidases

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Definitions:

Operant Conditioning

A method of learning that uses rewards and punishments to increase or decrease the likelihood of a behavior.

Behaviour Modification

A process of changing maladaptive or undesired behaviors through reinforcement strategies, punishment, or other learning techniques.

Classical Conditioning

A mode of learning through which two stimuli are systematically associated; a reaction that is initially provoked by the second stimulus soon gets provoked by the first stimulus.

Observational Learning

A learning process where individuals observe and mimic the behavior of others, acquiring new skills or behaviors without direct experience.