The Current Model for the Nucleation of Microtubules Is That

question 43

Multiple Choice

The current model for the nucleation of microtubules is that a helical array of gamma-tubulin subunit forms an open,ring-shaped template on which the first row of alphabeta-tubulin dimers assembles.How does this model account for the polarity of microtubules?

• A)Only the alpha-tubulin of a heterodimer can bind to the ring of gamma-subunits.
• B)Only the beta-tubulin of a heterodimer can bind to the ring of gamma-subunits.
• C)The ring structure straightens out the microtubule.
• D)The ring structure interacts with a homodimer instead of a heterodimer.
• E)Only the alpha-tubulin of a heterodimer can bind to the ring of gamma-subunits.and the ring structure straightens out the microtubule.

Discuss the evaluation process of stressful events according to Lazarus and Folkman.

Understand the influence of optimism and locus of control on stress experience.

Analyze the effects of identification and projection on individual behavior.

Appreciate the complexities of psychological adjustment in adverse conditions.

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Definitions:

Half Siblings

Children who share only one parent in common, either the same mother or the same father, making them genetically related by 25% under typical circumstances.

Bond

A strong connection, emotional tie or relationship between individuals or groups.

Abortion

The expulsion of an embryo or fetus from the uterus.

African American

A racial or ethnic group in the United States with ancestry from any of the black populations of Africa.