In Which of the Following Would the Rate of Impulse

question 137

Multiple Choice

In which of the following would the rate of impulse conduction be the greatest?

• A) a nonmyelinated fiber of 10- µm diameter
• B) a myelinated fiber of 1- µm diameter
• C) a nonmyelinated fiber of 20- µm diameter
• D) a myelinated fiber of 10- µm diameter
• E) the same in all because of the all- or- none principle

Grasp the sequence of events in the excision repair of DNA and its importance in maintaining genetic integrity.

Identify and differentiate between the structural and functional aspects of DNA replication.

Recognize the role and mechanism of action of antiviral drugs like acyclovir in the treatment of viral infections.

Explain the stability features of the DNA double helix and factors contributing to its structural integrity.

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Definitions:

Axial Positions

Locations on a molecule, especially in cyclic compounds like cyclohexane, that are perpendicular to the plane of the ring, typically leading to higher steric strain.

Cis-1,3-Dimethylcyclohexane

An isomer of dimethylcyclohexane where the two methyl groups are located on the same side of the cyclohexane ring.

Hydrogen Atoms

The simplest type of atom, consisting of one proton and one electron, fundamental to the structure of organic molecules.

Cis-1-T-Butyl-4-Methylcyclohexane

A specific isomer of a chemical compound characterized by the cis configuration of 1-tert-butyl and 4-methyl groups on a cyclohexane ring.