The Bond Angles About the Carbon Atom in the Formaldehyde

question 4

Multiple Choice

The bond angles about the carbon atom in the formaldehyde molecule,H₂C=O,are about:

• A)120°
• B)60°
• C)109°
• D)180°
• E)90°

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Definitions:

IgD

A class of antibodies that play a role in the immune system's response to antigens, mainly found on the surface of B cells.

Secondary Immune Response

The enhanced immune response elicited upon a second or subsequent exposure to a specific antigen, providing quicker and more effective protection.

Memory Cells

Long-lived immune cells that "remember" past infections, allowing for a faster and stronger response upon re-exposure to the same pathogen.

Latent Period

The time interval between exposure to a pathogen or initiating event and the onset of symptoms or disease.