In multiple sclerosis, the myelin sheaths around the axons of the brain and spinal cord are damaged and demyelination results. How does this disease manifest at the level of the action potential?

 I) Action potentials move in the opposite direction on the axon.

 II) Action potentials move more slowly along the axon.

 III) No action potentials are transmitted.

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#Question id: 32324

#Unit 1. Molecules and their Interaction Relevant to Biology

If malate is converted to fumarate with standard free change 3 kJ/mol then this reaction is

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#Question id: 3945

#Unit 3. Fundamental Processes

About 30% of point mutations (substitutions) that occur in coding regions of DNA are harmless. Why?

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#Question id: 27681

#Unit 1. Molecules and their Interaction Relevant to Biology

The structural database for the Structural Classification of Proteins is

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#Question id: 14825

#Unit 2. Cellular Organization

Actinomycetes characteristically form long multinucleate filaments or hyphae that may branch to produce a network called a 

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#Question id: 718

#Unit 1. Molecules and their Interaction Relevant to Biology

Poly- L -leucine in an organic solvent such as dioxane is a helical, whereas poly- L isoleucine is not. Why do these amino acids with the same number and kinds of atoms have different helix-forming tendencies?