DnaA-ATP binds cooperatively to form a helical central core around which oriC DNA is wrapped.

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#Id: 7478

#Unit 4. Cell Communication and Cell Signaling

IgM antibodies are produced first in a humoral immune response and tend to be of low affinity.

IgM molecules form pentamers that are stabilized by a single J-chain molecule.

This higher avidity of the pentamer compensates for the low affinity

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#Id: 9517

#Unit 6. System Physiology – Plant

During infection, most bacteria remain in extracellular spaces and use a specialized mechanism, the type III secretion system (T3SS), to deliver bacterial effector proteins into the plant cell

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#Id: 1259

#Unit 7. System Physiology – Animal

Central diabetes insipidus – No ADH Nephrogenic diabetes insipidus - principal cells are unresponsive to ADH

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#Id: 469

#Unit 2. Cellular Organization

Introns evolve or accumulate mutations/changes much more rapidly than exons

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#Id: 4026

#Unit 7. System Physiology – Animal

Potassium channels remain open for another few tenths of a second, with resultant excess negativity inside the fiber; this process is called hyperpolarization.