Biotechnology HW 52.2

What is the primary characteristic of adaptive immunity?

• It is innate and non-specific.

• It is acquired and specific.

• It is temporary and non-specific.

• It is inherited and specific.

How do B lymphocytes acquire receptors?

• Through genetic inheritance.

• By exposure to antigens.

• By random mutation.

• Through environmental factors.

What is the difference between humoral and cellular forms of immunity?

• Humoral immunity involves antibodies, while cellular immunity involves T cells.

• Humoral immunity involves T cells, while cellular immunity involves antibodies.

• Both involve antibodies.

• Both involve T cells.

What was Edward Jenner's contribution to immunology?

• He discovered the smallpox virus.

• He developed the first vaccine using cowpox.

• He invented antibiotics.

• He discovered the chickenpox virus.

What is an antigen?

• A type of white blood cell.

• A molecule that provokes a specific immune response.

• A type of bacteria.

• A type of virus.

What is the function of a Helper T cell in the immune system?

• Specifically recognizes and kills "altered-self" cells

• Binds specific soluble antigens with its membrane-bound antibody

• Specifically recognizes foreign peptides on antigen-presenting cells

• Rapidly recognizes and kills virally infected or tumor cells

Which cell type is a precursor of macrophages and is located in blood?

• Plasma cell

• Monocyte

• Eosinophil

• Basophil

What is the role of dendritic cells in the immune system?

• Important in the elimination of parasites

• Important antigen-presenting cell to naive T_H cells

• Circulating cell that releases mediators such as histamine

• Phagocytic tissue cell that is a component of the body's first cellular line of defense

Which of the following is NOT a characteristic of the adaptive immune system?

• Specificity of recognition of antigen

• Wide diversity of antigens can be specifically recognized

• Ability to distinguish self-antigens from nonself

• Immediate response to pathogens

What is the role of B cells in the immune response?

• Secreting antibodies

• Engulfing pathogens

• Producing histamines

• Destroying infected cells directly