Actinomyces Spp

question 21

Multiple Choice

Actinomyces spp. ,Bifidobacterium spp. ,and Clostridium spp.can be described as:

• A)aerotolerant organisms that can grow in the presence of either reduced or atmospheric oxygen but grow best under microaerobic conditions.
• B)strictly anaerobic organisms that cannot grow in the presence of either reduced or atmospheric oxygen but grow only under anaerobic conditions.
• C)aerotolerant organisms that can grow in the presence of either reduced or atmospheric oxygen but grow best under anaerobic conditions.
• D)facultatively anaerobic organisms that grow in the presence or absence of atmospheric oxygen.

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Definitions:

HOMO

Highest Occupied Molecular Orbital; the electron orbital with the highest energy level that is occupied by electrons in a molecule under ground state conditions.

Mechanism

A detailed description of the step-by-step process by which chemical reactions occur, including the breaking and formation of bonds.

Endo Rule

A guideline in Diels-Alder reactions predicting that the endo product is preferred for thermodynamic or kinetic reasons.

Diels-Alder

A synthetic chemical reaction between a conjugated diene and a substituted alkene, known as the dienophile, to form a cyclic product.