Which of the Following Is True About the Structure of the Microtubule

question 14

Multiple Choice

Which of the following is true about the structure of the microtubule wall?

• A)α-β-tubulin heterodimers are arranged with mixed orientation in each protofilament,and protofilaments are arranged with mixed polarity in the microtubule wall.
• B)α-β-tubulin heterodimers are arranged with the same orientation in each protofilament,and protofilaments are arranged with mixed polarity in the microtubule wall.
• C)α-β-tubulin heterodimers are arranged with the mixed orientation in each protofilament,and protofilaments are arranged with same polarity in the microtubule wall.
• D)α-β-tubulin heterodimers are arranged with the same orientation in each protofilament,and protofilaments are arranged with same polarity in the microtubule wall.
• E)Orientation of the α-β-tubulin heterodimers is completely random and depends on which end of the dimer first hits the end of the microtubule when it assembles.

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Definitions:

Multiple Coefficient

A broader term potentially indicating coefficients in multiple regression that represent the relationship between explanatory variables and the response variable.

Determination

Often associated with the coefficient of determination (R-squared), it measures the proportion of variance in the dependent variable predictable from the independent variable(s).

Degrees of Freedom

The number of independent values or quantities that can vary in an analysis without breaking any constraints.

Critical Value

A value that is compared with the test statistic to determine whether H0 should be rejected.