BSCS Biology: A Molecular Approach

Chapter 23: Immune Systems

Chapter Test

1.
What is an example of a nonspecific defense mechanism in animals?
A)antibody-mediated immune response
B)cell-mediated immune response
C)helper T cells
D)phagocytosis
2.
Some pathogens can change their____ to evade their hosts' immune responses.
A)antibodies
B)cell walls
C)macrophages
D)surface antigens
3.
When T cells and B cells migrate throughout the body seeking out and destroying foreign cells and substances, they are performing____.
A)immune surveillance
B)cell-mediated immune response
C)antibody-mediated immune response
D)phagocytosis
4.
During clonal selection, antigens bind to antibodies on a lymphocyte, causing the lymphocyte to ____.
A)swell
B)secrete antibodies
C)divide
D)die
5.
Which statement about B cells is not true?
A)Each B cell is covered by thousands of identical antibodies.
B)B cells can differentiate into plasma cells.
C)B cells recognize antigens that are bound to major histocampatibility complex proteins.
D)The main role of B cells is to produce antibodies.
6.
What kind of cells account for the speed of the secondary immune response?
A)macrophages
B)helper T cells
C)memory B cells
D)cytotoxic T lymphocytes
7.
What is true about the structure of antibodies?
A)Each antibody molecule has one antigen binding site.
B)The amino acid sequence of the polypeptides is constant for all antibodies.
C)Each antibody is made of two polypeptide chains.
D)The structure of the antibody is complementary to the antigen it binds.
8.
How do helper T cells control the immune response?
A)They release cytokines that activate T cells and B cells.
B)They engulf and destroy invading pathogens.
C)They produce and secrete antibodies.
D)They divide to become memory cytotoxic T lymphocytes.
9.
HIV primarily destroys ____, leading to weakening of the immune system.
A)phagocytes
B)helper T cells
C)cytotoxic T lymphocytes
D)memory B cells
10.
What is an example of a disease in which autoimmunity occurs?
A)rheumatoid arthritis
B)AIDS
C)asthma
D)allergies
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe