Use the word bank to identify the labeled structures of the antibody in the diagram: antigen, antigen-binding site, variable region, constant region, light chain, heavy chain. Briefly describe the structure.
What will be an ideal response?
A - Variable region: regions of the light and heavy chain that have a variable amino acid sequence. This region forms the antigen-binding site.
B - Constant region: regions of the light and heavy chain where the amino acid sequence is set, or constant. This region determines the class of the antibody.
C - Antigen: foreign substance that elicits an immune response
D - Light chain: shorter polypeptide chains of an antibody
E - Heavy chain: long polypeptide chains of an antibody
F - Antigen-binding site: the variable regions of the heavy and light chain that have a shape specific to a particular antigen.
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Which of the following statements about bone and its structure is NOT correct?
A. Bone contains an extracellular matrix of collagen fibers and inorganic calcium phosphate crystals. B. Bone tissue is not living because it contains inorganic calcium phosphate crystals. C. Bone tissue is a special form of connective tissue. D. Bone tissue serves as a reservoir for calcium and phosphate ions. E. Bone marrow is a reservoir for blood stem cells
The ____ components of blood are involved in the formation of clots
a. albumin and fibrinogen b. albumin and leukocytes c. fibrinogen and erythrocytes d. fibrinogen and platelets e. platelets and albumin
The process whereby one species gives rise to several others that exploit different features of the environment is known as
A) exponential growth. B) coevolution. C) adaptive radiation. D) competition.
Fossil evidence shows that all modern human populations evolved from human ancestors in Africa
Indicate whether the statement is true or false