You Add an Unknown Phage to a Mixture of F⁺

question 52

Multiple Choice

You add an unknown phage to a mixture of F⁺ and F^- cells of E. coli and plate out the bacteria. The bacterial colonies that grow are all F^-. How can you explain this phenomenon?

• A) The phage bound to a receptor on the sex pilus, and therefore only infected the F⁺ cells (leaving the F^- cells alone).
• B) The phage bound to a receptor on the F^- cells, leaving only them alive and allowing the F⁺ cells to die off.
• C) The phage integrated (lysogenized) the F^- cells, giving them a selective advantage over the F⁺ cells.
• D) F⁺ cells are uniquely susceptible to phage attack for unknown reasons.

Analyze examples of defense mechanisms in response to anxiety and internal conflicts.

Understand the concept of defense mechanisms and their examples in everyday situations.

Grasp Freud's theory of dreams, including the distinction between manifest content and latent content.

Recognize the use of projective tests in assessing unconscious motives and themes, such as the Rorschach inkblot test and the Thematic Apperception Test.

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Definitions:

Cognitive-Behavioral Therapy

A type of therapy aimed at enhancing well-being and solving issues through the alteration of ineffective emotions, actions, and thought processes.

Drug Therapy

The treatment of diseases and disorders with medications designed to target specific symptoms or causes of the condition.

Brain Stimulation Treatments

Medical treatments using electrical impulses, magnetic fields, or direct stimulation to alter brain activity and treat neurological or mental health conditions.

Adolescents

Young people in the phase of life transitioning from childhood to adulthood, typically ranging from puberty to legal adulthood.