Biotechnology HW 52.4

What are the two identical short polypeptides in an immunoglobulin molecule called?

• Heavy chains

• Light chains

• Fab region

• Fe region

What type of bonds hold the chains in an immunoglobulin molecule together?

• Hydrogen bonds

• Ionic bonds

• Disulfide bonds

• Peptide bonds

Tags

NGSS.HS-LS1-1

Which region of the immunoglobulin molecule is referred to as the "stem"?

• Fab region

• Fe region

• Variable region

• Constant region

What is the role of helper T cells in the immune response?

• They produce antibodies directly.

• They activate B cells and promote clonal expansion.

• They destroy antigens directly.

• They secrete hormones to regulate metabolism.

What are the two main types of chains in an immunoglobulin molecule?

• Heavy and light chains

• Alpha and beta chains

• Gamma and delta chains

• Mu and epsilon chains

What is the function of the Fc region in immunoglobulins?

• To bind to antigens

• To activate cells with Fc receptors

• To form disulfide bonds

• To determine the variable region

How many amino acids are typically found in each domain of an immunoglobulin fold?

• 50 amino acids

• 75 amino acids

• 110 amino acids

• 150 amino acids

Which regions of the immunoglobulin molecule are responsible for antigen binding?

• Fc regions

• Fab regions

• Constant regions

• Variable regions

Which class of immunoglobulin is the first type of antibody to be secreted during an immune response?

• IgG

• IgA

• IgM

• IgE

What is the function of IgG according to the table?

• Serves as an antigen receptor

• Promotes agglutination and precipitation reactions

• Neutralizes antigens and promotes their phagocytosis

• Triggers allergic reactions