The Two Strands of DNA in the DNA Double Helix

question 63

Multiple Choice

The two strands of DNA in the DNA double helix are held together by _____ bonds between nucleotides.

• A) hydrogen
• B) phosphodiester
• C) amide
• D) ionic
• E) glycosidic

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Definitions:

Initial Segment

The first portion of a nerve cell axon nearest to the cell body, critical for the initiation of neural signals.

Voltage-Regulated Channels

Ion channels in the cell membranes that open or close in response to changes in membrane potential, crucial for the transmission of electrical signals.

Hyperpolarization

A rise in the membrane potential of a cell, resulting in it becoming more negatively charged and reducing its chances of initiating an action potential.

Neuron Plasma Membrane

The membrane surrounding a neuron, controlling the entry and exit of substances, thus maintaining the cell's environment.